GoodWe error codes explained

A problem was detected with a connected generator input (voltage, frequency, wiring or start-up).

What you can do

• Check the generator itself (fuel, its own alarms)
• Call us to check the generator integration

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

A problem was detected with a connected generator input (voltage, frequency, wiring or start-up).

What you can do

• Check the generator itself (fuel, its own alarms)
• Call us to check the generator integration

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter has detected an AC wiring problem, for example active and neutral swapped or a connection made the wrong way round.

What you can do

• Do not touch any wiring
• Leave the system as it is and book a licensed electrician (or call us)

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter is running too hot, so it has reduced output or paused to protect itself.

What you can do

• Make sure nothing is stacked against or in front of the inverter, and leave the manufacturer's clearances around it
• Gently clear dust or leaves from the outside of the vents, without opening the unit or spraying water
• Let it cool. It normally resumes by itself
• If it keeps happening on mild days, call us

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The DC voltage coming from the solar panels is higher than the inverter is rated for. Over-voltage can damage the inverter.

What you can do

• Do not touch the DC isolator or cables unless the manufacturer's owner shutdown tells you to
• Call us. The string design needs to be checked by a licensed installer

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

A problem was detected with a connected generator input (voltage, frequency, wiring or start-up).

What you can do

• Check the generator itself (fuel, its own alarms)
• Call us to check the generator integration

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter's arc-fault detection has picked up a pattern that looks like electrical arcing on the DC (solar) side, which can be a fire risk. The inverter shuts down DC power flow as a precaution.

What you can do

• Do not reset it repeatedly and do not touch DC cables or isolators
• If you see smoke or flames or smell burning, keep clear and call 000
• Call us or a licensed electrician to inspect the DC wiring before the system is restarted

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter saw something abnormal about the grid supply (for example phase loss, imbalance, waveform distortion or loss of mains), so it disconnected as a safety measure.

What you can do

• Check whether you have a partial power outage (some circuits or phases off)
• Wait for automatic reconnection after the grid returns to normal
• If it persists or started after electrical work, call us

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter saw something abnormal about the grid supply (for example phase loss, imbalance, waveform distortion or loss of mains), so it disconnected as a safety measure.

What you can do

• Check whether you have a partial power outage (some circuits or phases off)
• Wait for automatic reconnection after the grid returns to normal
• If it persists or started after electrical work, call us

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter saw something abnormal about the grid supply (for example phase loss, imbalance, waveform distortion or loss of mains), so it disconnected as a safety measure.

What you can do

• Check whether you have a partial power outage (some circuits or phases off)
• Wait for automatic reconnection after the grid returns to normal
• If it persists or started after electrical work, call us

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter saw something abnormal about the grid supply (for example phase loss, imbalance, waveform distortion or loss of mains), so it disconnected as a safety measure.

What you can do

• Check whether you have a partial power outage (some circuits or phases off)
• Wait for automatic reconnection after the grid returns to normal
• If it persists or started after electrical work, call us

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter saw something abnormal about the grid supply (for example phase loss, imbalance, waveform distortion or loss of mains), so it disconnected as a safety measure.

What you can do

• Check whether you have a partial power outage (some circuits or phases off)
• Wait for automatic reconnection after the grid returns to normal
• If it persists or started after electrical work, call us

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter saw something abnormal about the grid supply (for example phase loss, imbalance, waveform distortion or loss of mains), so it disconnected as a safety measure.

What you can do

• Check whether you have a partial power outage (some circuits or phases off)
• Wait for automatic reconnection after the grid returns to normal
• If it persists or started after electrical work, call us

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter detected a problem with the earth (protective earth/PE) or with the neutral-to-earth connection. A sound earth is essential for electrical safety.

What you can do

• Do not touch the inverter, frames or cabling
• Leave the system off if it has shut down. Call a licensed electrician or us to test the earthing

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter detected too much DC current in its AC output, which the grid standards don't allow, so it disconnected.

What you can do

• If it happened once and the system recovered, keep an eye on it
• If it repeats, call us

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter detected too much DC current in its AC output, which the grid standards don't allow, so it disconnected.

What you can do

• If it happened once and the system recovered, keep an eye on it
• If it repeats, call us

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter measured leakage (residual) current flowing to earth above its safety limit and disconnected. This can indicate damaged insulation somewhere in the system.

What you can do

• Don't touch cabling or equipment
• If it happens repeatedly, or together with an insulation/isolation alarm, call an electrician or us promptly

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter's arc-fault detection has picked up a pattern that looks like electrical arcing on the DC (solar) side, which can be a fire risk. The inverter shuts down DC power flow as a precaution.

What you can do

• Do not reset it repeatedly and do not touch DC cables or isolators
• If you see smoke or flames or smell burning, keep clear and call 000
• Call us or a licensed electrician to inspect the DC wiring before the system is restarted

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

A monitoring or communication accessory (Wi-Fi/4G/data logger, display or clock) is reporting a problem. This usually doesn't stop the system generating.

What you can do

• Restart your home router and check it reaches the inverter location
• If you changed router or Wi-Fi password, the dongle needs reconfiguring (see the manufacturer's app guide or ask us)
• If generation looks normal but the alarm persists, call us

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The backup/EPS (off-grid) output is overloaded or abnormal, so the system has limited or switched off backup power.

What you can do

• Switch off large appliances on backup circuits
• Wait for the system to retry (some models lock out for a period after repeated overloads)
• If it trips with only small loads on, or you suspect a short circuit, call an electrician

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The backup/EPS (off-grid) output is overloaded or abnormal, so the system has limited or switched off backup power.

What you can do

• Switch off large appliances on backup circuits
• Wait for the system to retry (some models lock out for a period after repeated overloads)
• If it trips with only small loads on, or you suspect a short circuit, call an electrician

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter isn't getting correct readings from its energy meter or current sensor (CT). This affects export limiting, battery charging and monitoring accuracy.

What you can do

• Check the app. Generation may still be running normally
• Don't open the switchboard
• Call us to check the meter/CT wiring. If your system has an export limit, this needs fixing promptly

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The backup/EPS (off-grid) output is overloaded or abnormal, so the system has limited or switched off backup power.

What you can do

• Switch off large appliances on backup circuits
• Wait for the system to retry (some models lock out for a period after repeated overloads)
• If it trips with only small loads on, or you suspect a short circuit, call an electrician

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter is running too hot, so it has reduced output or paused to protect itself.

What you can do

• Make sure nothing is stacked against or in front of the inverter, and leave the manufacturer's clearances around it
• Gently clear dust or leaves from the outside of the vents, without opening the unit or spraying water
• Let it cool. It normally resumes by itself
• If it keeps happening on mild days, call us

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter is running too hot, so it has reduced output or paused to protect itself.

What you can do

• Make sure nothing is stacked against or in front of the inverter, and leave the manufacturer's clearances around it
• Gently clear dust or leaves from the outside of the vents, without opening the unit or spraying water
• Let it cool. It normally resumes by itself
• If it keeps happening on mild days, call us

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter is running too hot, so it has reduced output or paused to protect itself.

What you can do

• Make sure nothing is stacked against or in front of the inverter, and leave the manufacturer's clearances around it
• Gently clear dust or leaves from the outside of the vents, without opening the unit or spraying water
• Let it cool. It normally resumes by itself
• If it keeps happening on mild days, call us

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter is running too hot, so it has reduced output or paused to protect itself.

What you can do

• Make sure nothing is stacked against or in front of the inverter, and leave the manufacturer's clearances around it
• Gently clear dust or leaves from the outside of the vents, without opening the unit or spraying water
• Let it cool. It normally resumes by itself
• If it keeps happening on mild days, call us

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

There is a firmware, model or configuration mismatch between parts of the system, so it can't run normally.

What you can do

• Don't try to reflash firmware yourself unless the manufacturer's app tells you to and it's an owner function
• Call us. We can arrange a firmware update or reconfiguration with the manufacturer

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

There is a firmware, model or configuration mismatch between parts of the system, so it can't run normally.

What you can do

• Don't try to reflash firmware yourself unless the manufacturer's app tells you to and it's an owner function
• Call us. We can arrange a firmware update or reconfiguration with the manufacturer

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter has stopped or limited export to stay within the export limit set for your site, usually because meter readings dropped out or power briefly flowed the wrong way.

What you can do

• Check the app. Generation may still be running normally
• Don't open the switchboard
• Call us to check the meter/CT wiring. If your system has an export limit, this needs fixing promptly

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The backup/EPS (off-grid) output is overloaded or abnormal, so the system has limited or switched off backup power.

What you can do

• Switch off large appliances on backup circuits
• Wait for the system to retry (some models lock out for a period after repeated overloads)
• If it trips with only small loads on, or you suspect a short circuit, call an electrician

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The backup/EPS (off-grid) output is overloaded or abnormal, so the system has limited or switched off backup power.

What you can do

• Switch off large appliances on backup circuits
• Wait for the system to retry (some models lock out for a period after repeated overloads)
• If it trips with only small loads on, or you suspect a short circuit, call an electrician

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The backup/EPS (off-grid) output is overloaded or abnormal, so the system has limited or switched off backup power.

What you can do

• Switch off large appliances on backup circuits
• Wait for the system to retry (some models lock out for a period after repeated overloads)
• If it trips with only small loads on, or you suspect a short circuit, call an electrician

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

There is a firmware, model or configuration mismatch between parts of the system, so it can't run normally.

What you can do

• Don't try to reflash firmware yourself unless the manufacturer's app tells you to and it's an owner function
• Call us. We can arrange a firmware update or reconfiguration with the manufacturer

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery (or one of its internal parts) is above its safe temperature, so charging or discharging is limited or stopped to protect it.

What you can do

• Keep clear and do not open or touch the battery
• If you notice smoke, a burning or chemical smell, hissing, swelling or leaking, leave the area, keep others away and call 000
• Otherwise, make sure the space around the battery is clear and shaded, and call us or a licensed electrician to check it

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter temperature is below its operating range.

What you can do

• Wait for temperatures to rise. It should recover by itself
• If it persists in normal weather, call us

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

A surge protection device (SPD) inside or connected to the inverter is reporting a fault, often after a lightning storm or grid surge.

What you can do

• Don't open the inverter
• Call us. SPDs must be replaced by a licensed electrician

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

A surge protection device (SPD) inside or connected to the inverter is reporting a fault, often after a lightning storm or grid surge.

What you can do

• Don't open the inverter
• Call us. SPDs must be replaced by a licensed electrician

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

A cooling fan isn't working properly, which can make the unit run hot and reduce output.

What you can do

• From outside, check that nothing is blocking the vents
• Don't open the unit
• Call us to arrange a fan check or replacement

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

A cooling fan isn't working properly, which can make the unit run hot and reduce output.

What you can do

• From outside, check that nothing is blocking the vents
• Don't open the unit
• Call us to arrange a fan check or replacement

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The system has received a shutdown or control signal, or a protective input has been triggered (for example an emergency stop, demand response or external switch).

What you can do

• Check whether anyone operated an emergency stop or shutdown switch on purpose
• If so, follow the manual to release it only when it is safe
• If nobody did, call us

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter isn't getting correct readings from its energy meter or current sensor (CT). This affects export limiting, battery charging and monitoring accuracy.

What you can do

• Check the app. Generation may still be running normally
• Don't open the switchboard
• Call us to check the meter/CT wiring. If your system has an export limit, this needs fixing promptly

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

One solar string is behaving differently from the others (lower output or current flowing the wrong way), which often points to a panel, connector or configuration issue.

What you can do

• From the ground, check for new shading (trees, new structures) or obvious debris
• Compare string readings in your monitoring app if available
• Book a service check if it continues

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

One solar string is behaving differently from the others (lower output or current flowing the wrong way), which often points to a panel, connector or configuration issue.

What you can do

• From the ground, check for new shading (trees, new structures) or obvious debris
• Compare string readings in your monitoring app if available
• Book a service check if it continues

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter isn't getting correct readings from its energy meter or current sensor (CT). This affects export limiting, battery charging and monitoring accuracy.

What you can do

• Check the app. Generation may still be running normally
• Don't open the switchboard
• Call us to check the meter/CT wiring. If your system has an export limit, this needs fixing promptly

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter isn't getting correct readings from its energy meter or current sensor (CT). This affects export limiting, battery charging and monitoring accuracy.

What you can do

• Check the app. Generation may still be running normally
• Don't open the switchboard
• Call us to check the meter/CT wiring. If your system has an export limit, this needs fixing promptly

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter detected a problem with the earth (protective earth/PE) or with the neutral-to-earth connection. A sound earth is essential for electrical safety.

What you can do

• Do not touch the inverter, frames or cabling
• Leave the system off if it has shut down. Call a licensed electrician or us to test the earthing

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter is running too hot, so it has reduced output or paused to protect itself.

What you can do

• Make sure nothing is stacked against or in front of the inverter, and leave the manufacturer's clearances around it
• Gently clear dust or leaves from the outside of the vents, without opening the unit or spraying water
• Let it cool. It normally resumes by itself
• If it keeps happening on mild days, call us

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter is running too hot, so it has reduced output or paused to protect itself.

What you can do

• Make sure nothing is stacked against or in front of the inverter, and leave the manufacturer's clearances around it
• Gently clear dust or leaves from the outside of the vents, without opening the unit or spraying water
• Let it cool. It normally resumes by itself
• If it keeps happening on mild days, call us

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter is running too hot, so it has reduced output or paused to protect itself.

What you can do

• Make sure nothing is stacked against or in front of the inverter, and leave the manufacturer's clearances around it
• Gently clear dust or leaves from the outside of the vents, without opening the unit or spraying water
• Let it cool. It normally resumes by itself
• If it keeps happening on mild days, call us

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

A solar string or the battery appears to be connected with positive and negative swapped.

What you can do

• Do not touch any DC wiring
• Call us or a licensed electrician

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery's state of charge or voltage is low, so the system has stopped discharging it to protect the cells.

What you can do

• Allow it to recharge from solar (or the grid, if your settings allow)
• Check the app for other alarms that could be stopping charging
• If it stays low for days in good sun, call us. Batteries left flat for long periods can be damaged

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter measured low insulation resistance between the solar/battery DC circuits and earth. In Australia this is treated as an earth fault alarm, and the system must be checked by a licensed electrician.

What you can do

• Do not touch panels, DC cables, rooftop isolators or the inverter's DC connectors
• If it clears by itself after the weather dries out, still report it, because repeated alarms point to a developing fault
• Book an electrician or call us. An insulation test needs specialist equipment
• If you see smoke, burn marks or smell burning, keep clear and call 000

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The backup/EPS (off-grid) output is overloaded or abnormal, so the system has limited or switched off backup power.

What you can do

• Switch off large appliances on backup circuits
• Wait for the system to retry (some models lock out for a period after repeated overloads)
• If it trips with only small loads on, or you suspect a short circuit, call an electrician

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The system has stopped and is waiting for a manual reset. GoodWe gives no further detail in the manual, so treat it as needing a service check.

What you can do

• Note the time and any other alarms in the app
• Call us to arrange a check

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

A problem was detected with a connected generator input (voltage, frequency, wiring or start-up).

What you can do

• Check the generator itself (fuel, its own alarms)
• Call us to check the generator integration

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The backup/EPS (off-grid) output is overloaded or abnormal, so the system has limited or switched off backup power.

What you can do

• Switch off large appliances on backup circuits
• Wait for the system to retry (some models lock out for a period after repeated overloads)
• If it trips with only small loads on, or you suspect a short circuit, call an electrician

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter saw something abnormal about the grid supply (for example phase loss, imbalance, waveform distortion or loss of mains), so it disconnected as a safety measure.

What you can do

• Check whether you have a partial power outage (some circuits or phases off)
• Wait for automatic reconnection after the grid returns to normal
• If it persists or started after electrical work, call us

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter saw something abnormal about the grid supply (for example phase loss, imbalance, waveform distortion or loss of mains), so it disconnected as a safety measure.

What you can do

• Check whether you have a partial power outage (some circuits or phases off)
• Wait for automatic reconnection after the grid returns to normal
• If it persists or started after electrical work, call us

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The rate of change of the grid voltage phase was outside what your local grid standard allows, so the inverter disconnected.

What you can do

• Check whether you have a partial power outage (some circuits or phases off)
• Wait for automatic reconnection after the grid returns to normal
• If it persists or started after electrical work, call us

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery (or one of its internal parts) is above its safe temperature, so charging or discharging is limited or stopped to protect it.

What you can do

• Keep clear and do not open or touch the battery
• If you notice smoke, a burning or chemical smell, hissing, swelling or leaking, leave the area, keep others away and call 000
• Otherwise, make sure the space around the battery is clear and shaded, and call us or a licensed electrician to check it

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery (or one of its internal parts) is above its safe temperature, so charging or discharging is limited or stopped to protect it.

What you can do

• Keep clear and do not open or touch the battery
• If you notice smoke, a burning or chemical smell, hissing, swelling or leaking, leave the area, keep others away and call 000
• Otherwise, make sure the space around the battery is clear and shaded, and call us or a licensed electrician to check it

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery is too cold to charge or discharge safely, so it is pausing until it warms up.

What you can do

• Wait for the battery to warm up. Most systems recover automatically
• If it happens often, ask us whether the location or a heating feature (where the model has one) should be reviewed

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery is too cold to charge or discharge safely, so it is pausing until it warms up.

What you can do

• Wait for the battery to warm up. Most systems recover automatically
• If it happens often, ask us whether the location or a heating feature (where the model has one) should be reviewed

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter measured low insulation resistance between the solar/battery DC circuits and earth. In Australia this is treated as an earth fault alarm, and the system must be checked by a licensed electrician.

What you can do

• Do not touch panels, DC cables, rooftop isolators or the inverter's DC connectors
• If it clears by itself after the weather dries out, still report it, because repeated alarms point to a developing fault
• Book an electrician or call us. An insulation test needs specialist equipment
• If you see smoke, burn marks or smell burning, keep clear and call 000

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery (or one of its internal parts) is above its safe temperature, so charging or discharging is limited or stopped to protect it.

What you can do

• Keep clear and do not open or touch the battery
• If you notice smoke, a burning or chemical smell, hissing, swelling or leaking, leave the area, keep others away and call 000
• Otherwise, make sure the space around the battery is clear and shaded, and call us or a licensed electrician to check it

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter and battery (or parts inside the battery) have stopped talking to each other, so the battery may stop charging or discharging.

What you can do

• Check the battery's indicator lights and your monitoring app for other alarms
• Don't unplug or re-plug cables yourself
• Call us if it does not clear within a few hours

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery (or one of its internal parts) is above its safe temperature, so charging or discharging is limited or stopped to protect it.

What you can do

• Keep clear and do not open or touch the battery
• If you notice smoke, a burning or chemical smell, hissing, swelling or leaking, leave the area, keep others away and call 000
• Otherwise, make sure the space around the battery is clear and shaded, and call us or a licensed electrician to check it

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery (or one of its internal parts) is above its safe temperature, so charging or discharging is limited or stopped to protect it.

What you can do

• Keep clear and do not open or touch the battery
• If you notice smoke, a burning or chemical smell, hissing, swelling or leaking, leave the area, keep others away and call 000
• Otherwise, make sure the space around the battery is clear and shaded, and call us or a licensed electrician to check it

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery is too cold to charge or discharge safely, so it is pausing until it warms up.

What you can do

• Wait for the battery to warm up. Most systems recover automatically
• If it happens often, ask us whether the location or a heating feature (where the model has one) should be reviewed

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery is too cold to charge or discharge safely, so it is pausing until it warms up.

What you can do

• Wait for the battery to warm up. Most systems recover automatically
• If it happens often, ask us whether the location or a heating feature (where the model has one) should be reviewed

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter measured low insulation resistance between the solar/battery DC circuits and earth. In Australia this is treated as an earth fault alarm, and the system must be checked by a licensed electrician.

What you can do

• Do not touch panels, DC cables, rooftop isolators or the inverter's DC connectors
• If it clears by itself after the weather dries out, still report it, because repeated alarms point to a developing fault
• Book an electrician or call us. An insulation test needs specialist equipment
• If you see smoke, burn marks or smell burning, keep clear and call 000

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery (or one of its internal parts) is above its safe temperature, so charging or discharging is limited or stopped to protect it.

What you can do

• Keep clear and do not open or touch the battery
• If you notice smoke, a burning or chemical smell, hissing, swelling or leaking, leave the area, keep others away and call 000
• Otherwise, make sure the space around the battery is clear and shaded, and call us or a licensed electrician to check it

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery (or one of its internal parts) is above its safe temperature, so charging or discharging is limited or stopped to protect it.

What you can do

• Keep clear and do not open or touch the battery
• If you notice smoke, a burning or chemical smell, hissing, swelling or leaking, leave the area, keep others away and call 000
• Otherwise, make sure the space around the battery is clear and shaded, and call us or a licensed electrician to check it

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery (or one of its internal parts) is above its safe temperature, so charging or discharging is limited or stopped to protect it.

What you can do

• Keep clear and do not open or touch the battery
• If you notice smoke, a burning or chemical smell, hissing, swelling or leaking, leave the area, keep others away and call 000
• Otherwise, make sure the space around the battery is clear and shaded, and call us or a licensed electrician to check it

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter and battery (or parts inside the battery) have stopped talking to each other, so the battery may stop charging or discharging.

What you can do

• Check the battery's indicator lights and your monitoring app for other alarms
• Don't unplug or re-plug cables yourself
• Call us if it does not clear within a few hours

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter and battery (or parts inside the battery) have stopped talking to each other, so the battery may stop charging or discharging.

What you can do

• Check the battery's indicator lights and your monitoring app for other alarms
• Don't unplug or re-plug cables yourself
• Call us if it does not clear within a few hours

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery (or one of its internal parts) is above its safe temperature, so charging or discharging is limited or stopped to protect it.

What you can do

• Keep clear and do not open or touch the battery
• If you notice smoke, a burning or chemical smell, hissing, swelling or leaking, leave the area, keep others away and call 000
• Otherwise, make sure the space around the battery is clear and shaded, and call us or a licensed electrician to check it

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. Get help with this code

A solar string or the battery appears to be connected with positive and negative swapped.

What you can do

• Do not touch any DC wiring
• Call us or a licensed electrician

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

Current on one or more solar strings is above the limit, or the string current sensor is reading abnormally.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter sees no input from a string, and GoodWe points to an open string fuse (on models with string fuses).

What you can do

• From the ground, check for new shading (trees, new structures) or obvious debris
• Compare string readings in your monitoring app if available
• Book a service check if it continues

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter has a record that a string was connected with reversed polarity at some point, which caused the trip switch to operate. A technician needs to check the string before the warning is cleared in the app.

What you can do

• Do not touch any DC wiring
• Call us or a licensed electrician

ET/BT G20 hybrid (ESA) incl. GW9.999K-ETA-G20 · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Earlier hybrids: ET, ET Plus+, EH, ES, EM, EHB and BT/BH/SBP (app error codes) · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Earlier hybrids: ET, ET Plus+, EH, ES, EM, EHB and BT/BH/SBP (app error codes) · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter's arc-fault detection has picked up a pattern that looks like electrical arcing on the DC (solar) side, which can be a fire risk. The inverter shuts down DC power flow as a precaution.

What you can do

• Do not reset it repeatedly and do not touch DC cables or isolators
• If you see smoke or flames or smell burning, keep clear and call 000
• Call us or a licensed electrician to inspect the DC wiring before the system is restarted

Earlier hybrids: ET, ET Plus+, EH, ES, EM, EHB and BT/BH/SBP (app error codes) · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Earlier hybrids: ET, ET Plus+, EH, ES, EM, EHB and BT/BH/SBP (app error codes) · Guide only. All work must be done by a licensed electrician. Get help with this code

The internal DC bus voltage of the inverter is too low. GoodWe lists no cause or fix in this guide.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Earlier hybrids: ET, ET Plus+, EH, ES, EM, EHB and BT/BH/SBP (app error codes) · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Earlier hybrids: ET, ET Plus+, EH, ES, EM, EHB and BT/BH/SBP (app error codes) · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Earlier hybrids: ET, ET Plus+, EH, ES, EM, EHB and BT/BH/SBP (app error codes) · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Earlier hybrids: ET, ET Plus+, EH, ES, EM, EHB and BT/BH/SBP (app error codes) · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter cannot see a normal mains supply, so it has stopped exporting to the grid (and a hybrid system may switch to backup).

What you can do

• Check whether the rest of the house (or your neighbours) has power, and check your network operator's outage map
• Check the switchboard for a tripped solar supply main switch or inverter breaker. Only reset it once. If it trips again, leave it off and call an electrician
• Wait. Once normal grid power is back, the inverter normally reconnects by itself after its safety checks (often a few minutes)
• If grid power is normal but the alarm stays, call us

Earlier hybrids: ET, ET Plus+, EH, ES, EM, EHB and BT/BH/SBP (app error codes) · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter measured leakage (residual) current flowing to earth above its safety limit and disconnected. This can indicate damaged insulation somewhere in the system.

What you can do

• Don't touch cabling or equipment
• If it happens repeatedly, or together with an insulation/isolation alarm, call an electrician or us promptly

Earlier hybrids: ET, ET Plus+, EH, ES, EM, EHB and BT/BH/SBP (app error codes) · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Earlier hybrids: ET, ET Plus+, EH, ES, EM, EHB and BT/BH/SBP (app error codes) · Guide only. All work must be done by a licensed electrician. Get help with this code

The backup/EPS (off-grid) output is overloaded or abnormal, so the system has limited or switched off backup power.

What you can do

• Switch off large appliances on backup circuits
• Wait for the system to retry (some models lock out for a period after repeated overloads)
• If it trips with only small loads on, or you suspect a short circuit, call an electrician

Earlier hybrids: ET, ET Plus+, EH, ES, EM, EHB and BT/BH/SBP (app error codes) · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter is running too hot, so it has reduced output or paused to protect itself.

What you can do

• Make sure nothing is stacked against or in front of the inverter, and leave the manufacturer's clearances around it
• Gently clear dust or leaves from the outside of the vents, without opening the unit or spraying water
• Let it cool. It normally resumes by itself
• If it keeps happening on mild days, call us

Earlier hybrids: ET, ET Plus+, EH, ES, EM, EHB and BT/BH/SBP (app error codes) · Guide only. All work must be done by a licensed electrician. Get help with this code

An automatic grid-protection self-test did not pass. GoodWe gives no further detail in this guide.

What you can do

• Note the code
• Call us

Earlier hybrids: ET, ET Plus+, EH, ES, EM, EHB and BT/BH/SBP (app error codes) · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter saw something abnormal about the grid supply (for example phase loss, imbalance, waveform distortion or loss of mains), so it disconnected as a safety measure.

What you can do

• Check whether you have a partial power outage (some circuits or phases off)
• Wait for automatic reconnection after the grid returns to normal
• If it persists or started after electrical work, call us

Earlier hybrids: ET, ET Plus+, EH, ES, EM, EHB and BT/BH/SBP (app error codes) · Guide only. All work must be done by a licensed electrician. Get help with this code

The DC voltage coming from the solar panels is higher than the inverter is rated for. Over-voltage can damage the inverter.

What you can do

• Do not touch the DC isolator or cables unless the manufacturer's owner shutdown tells you to
• Call us. The string design needs to be checked by a licensed installer

Earlier hybrids: ET, ET Plus+, EH, ES, EM, EHB and BT/BH/SBP (app error codes) · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Earlier hybrids: ET, ET Plus+, EH, ES, EM, EHB and BT/BH/SBP (app error codes) · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Earlier hybrids: ET, ET Plus+, EH, ES, EM, EHB and BT/BH/SBP (app error codes) · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Earlier hybrids: ET, ET Plus+, EH, ES, EM, EHB and BT/BH/SBP (app error codes) · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Earlier hybrids: ET, ET Plus+, EH, ES, EM, EHB and BT/BH/SBP (app error codes) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery licence/activation code entered for the inverter is incorrect, so battery functions are blocked.

What you can do

• Call us to re-enter the correct activation code

Earlier hybrids: ET, ET Plus+, EH, ES, EM, EHB and BT/BH/SBP (app error codes) · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter saw something abnormal about the grid supply (for example phase loss, imbalance, waveform distortion or loss of mains), so it disconnected as a safety measure.

What you can do

• Check whether you have a partial power outage (some circuits or phases off)
• Wait for automatic reconnection after the grid returns to normal
• If it persists or started after electrical work, call us

Earlier hybrids: ET, ET Plus+, EH, ES, EM, EHB and BT/BH/SBP (app error codes) · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Earlier hybrids: ET, ET Plus+, EH, ES, EM, EHB and BT/BH/SBP (app error codes) · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Earlier hybrids: ET, ET Plus+, EH, ES, EM, EHB and BT/BH/SBP (app error codes) · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Earlier hybrids: ET, ET Plus+, EH, ES, EM, EHB and BT/BH/SBP (app error codes) · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Earlier hybrids: ET, ET Plus+, EH, ES, EM, EHB and BT/BH/SBP (app error codes) · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter detected too much DC current in its AC output, which the grid standards don't allow, so it disconnected.

What you can do

• If it happened once and the system recovered, keep an eye on it
• If it repeats, call us

Earlier hybrids: ET, ET Plus+, EH, ES, EM, EHB and BT/BH/SBP (app error codes) · Guide only. All work must be done by a licensed electrician. Get help with this code

The DC voltage coming from the solar panels is higher than the inverter is rated for. Over-voltage can damage the inverter.

What you can do

• Do not touch the DC isolator or cables unless the manufacturer's owner shutdown tells you to
• Call us. The string design needs to be checked by a licensed installer

Earlier hybrids: ET, ET Plus+, EH, ES, EM, EHB and BT/BH/SBP (app error codes) · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter measured low insulation resistance between the solar/battery DC circuits and earth. In Australia this is treated as an earth fault alarm, and the system must be checked by a licensed electrician.

What you can do

• Do not touch panels, DC cables, rooftop isolators or the inverter's DC connectors
• If it clears by itself after the weather dries out, still report it, because repeated alarms point to a developing fault
• Book an electrician or call us. An insulation test needs specialist equipment
• If you see smoke, burn marks or smell burning, keep clear and call 000

Earlier hybrids: ET, ET Plus+, EH, ES, EM, EHB and BT/BH/SBP (app error codes) · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Earlier hybrids: ET, ET Plus+, EH, ES, EM, EHB and BT/BH/SBP (app error codes) · Guide only. All work must be done by a licensed electrician. Get help with this code

Grid frequency out of permissible range

What you can do

• This is caused by the mains frequency moving outside the allowed range, usually briefly
• The inverter reconnects by itself once the grid is stable
• If it keeps happening, note the times and call your installer

XS series single-phase string (GW700-3000-XS) · Guide only. All work must be done by a licensed electrician. Get help with this code

Ground insulation impedance is too low

What you can do

• Do not touch the panels, rooftop isolators or DC cables
• Note the code and whether it appears in wet weather or early morning - this helps the electrician
• If it clears by itself once things dry out, still let us know if it keeps returning
• Call a licensed electrician or Total Solar - insulation and earth faults need testing with proper equipment

XS series single-phase string (GW700-3000-XS) · Guide only. All work must be done by a licensed electrician. Get help with this code

Grid voltage out of permissible range

What you can do

• This is usually caused by the mains supply, not the solar system
• The inverter normally reconnects by itself once grid voltage is back in range
• If it happens often (especially on sunny afternoons), note the times and call your installer - they can check the voltage and settings and talk to the network if needed

XS series single-phase string (GW700-3000-XS) · Guide only. All work must be done by a licensed electrician. Get help with this code

Overvoltage at DC input

What you can do

• Do not touch the DC isolators or cables
• Note the time - this often shows on cold, very sunny mornings
• Call your installer - the panel strings may need to be checked against the inverter's limits

XS series single-phase string (GW700-3000-XS) · Guide only. All work must be done by a licensed electrician. Get help with this code

Over Temperature on the case

What you can do

• Check from a safe distance that the inverter is shaded, has clear space around it and that nothing is blocking the vents
• It usually recovers once it cools down
• If it repeats often or you can hear a noisy/failed fan, call your installer

XS series single-phase string (GW700-3000-XS) · Guide only. All work must be done by a licensed electrician. Get help with this code

Utility is unavailable

What you can do

• Check whether the rest of your house or street has power, and check your network operator's outage map
• Check the switchboard for a tripped solar/inverter breaker - reset it once only; if it trips again, leave it off and call an electrician
• Once normal power is back the inverter usually reconnects on its own within a few minutes
• If the power is normal but the alarm stays, call your installer

XS series single-phase string (GW700-3000-XS) · Guide only. All work must be done by a licensed electrician. Get help with this code

E Of Fault Isolation Failure

What you can do

• Do not touch the panels, rooftop isolators or DC cables
• Note the code and whether it appears in wet weather or early morning - this helps the electrician
• If it clears by itself once things dry out, still let us know if it keeps returning
• Call a licensed electrician or Total Solar - insulation and earth faults need testing with proper equipment

XS series single-phase string (GW700-3000-XS) · Guide only. All work must be done by a licensed electrician. Get help with this code

Ground I Failure

What you can do

• Do not touch the panels, rooftop isolators or DC cables
• Note the code and whether it appears in wet weather or early morning - this helps the electrician
• If it clears by itself once things dry out, still let us know if it keeps returning
• Call a licensed electrician or Total Solar - insulation and earth faults need testing with proper equipment

XS series single-phase string (GW700-3000-XS) · Guide only. All work must be done by a licensed electrician. Get help with this code

Fac Failure

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

XS series single-phase string (GW700-3000-XS) · Guide only. All work must be done by a licensed electrician. Get help with this code

The Default Value (Australia & New Zealand) （ ）

What you can do

• Check that your home Wi-Fi/internet is working and restart your router
• Wait an hour - monitoring often reconnects by itself
• If the inverter screen also shows a fault, or the alarm stays for more than a day, call your installer

XS series single-phase string (GW700-3000-XS) · Guide only. All work must be done by a licensed electrician. Get help with this code

Relay-Check Failure

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

XS series single-phase string (GW700-3000-XS) · Guide only. All work must be done by a licensed electrician. Get help with this code

No Display

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

XS series single-phase string (GW700-3000-XS) · Guide only. All work must be done by a licensed electrician. Get help with this code

Wi-Fi Module Fail To Connect To Network

What you can do

• Check that your home Wi-Fi/internet is working and restart your router
• Wait an hour - monitoring often reconnects by itself
• If the inverter screen also shows a fault, or the alarm stays for more than a day, call your installer

XS series single-phase string (GW700-3000-XS) · Guide only. All work must be done by a licensed electrician. Get help with this code

Isolation Failure

What you can do

• Do not touch the panels, rooftop isolators or DC cables
• Note the code and whether it appears in wet weather or early morning - this helps the electrician
• If it clears by itself once things dry out, still let us know if it keeps returning
• Call a licensed electrician or Total Solar - insulation and earth faults need testing with proper equipment

DNS series single-phase string · Guide only. All work must be done by a licensed electrician. Get help with this code

Ground I Failure

What you can do

• Do not touch the panels, rooftop isolators or DC cables
• Note the code and whether it appears in wet weather or early morning - this helps the electrician
• If it clears by itself once things dry out, still let us know if it keeps returning
• Call a licensed electrician or Total Solar - insulation and earth faults need testing with proper equipment

DNS series single-phase string · Guide only. All work must be done by a licensed electrician. Get help with this code

Vac Failure

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

DNS series single-phase string · Guide only. All work must be done by a licensed electrician. Get help with this code

Fac Failure

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

DNS series single-phase string · Guide only. All work must be done by a licensed electrician. Get help with this code

Utility Loss

What you can do

• Check whether the rest of your house or street has power, and check your network operator's outage map
• Check the switchboard for a tripped solar/inverter breaker - reset it once only; if it trips again, leave it off and call an electrician
• Once normal power is back the inverter usually reconnects on its own within a few minutes
• If the power is normal but the alarm stays, call your installer

DNS series single-phase string · Guide only. All work must be done by a licensed electrician. Get help with this code

Pv Over Voltage

What you can do

• Do not touch the DC isolators or cables
• Note the time - this often shows on cold, very sunny mornings
• Call your installer - the panel strings may need to be checked against the inverter's limits

DNS series single-phase string · Guide only. All work must be done by a licensed electrician. Get help with this code

Over Temperature

What you can do

• Check from a safe distance that the inverter is shaded, has clear space around it and that nothing is blocking the vents
• It usually recovers once it cools down
• If it repeats often or you can hear a noisy/failed fan, call your installer

DNS series single-phase string · Guide only. All work must be done by a licensed electrician. Get help with this code

Steady yellow

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

SDT G2 three-phase string (4-25kW) · Guide only. All work must be done by a licensed electrician. Get help with this code

Single yellow blinking

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

SDT G2 three-phase string (4-25kW) · Guide only. All work must be done by a licensed electrician. Get help with this code

Double yellow blinking

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

SDT G2 three-phase string (4-25kW) · Guide only. All work must be done by a licensed electrician. Get help with this code

Quadruple yellow blinking

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

SDT G2 three-phase string (4-25kW) · Guide only. All work must be done by a licensed electrician. Get help with this code

Yellow blinking

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

SDT G2 three-phase string (4-25kW) · Guide only. All work must be done by a licensed electrician. Get help with this code

Off

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

SDT G2 three-phase string (4-25kW) · Guide only. All work must be done by a licensed electrician. Get help with this code

Single Green Slow Blinking

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

SDT G2 three-phase string (4-25kW) · Guide only. All work must be done by a licensed electrician. Get help with this code

Steady green

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

SDT G2 three-phase string (4-25kW) · Guide only. All work must be done by a licensed electrician. Get help with this code

Power Limit

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

SDT G2 three-phase string (4-25kW) · Guide only. All work must be done by a licensed electrician. Get help with this code

LVRT

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

SDT G2 three-phase string (4-25kW) · Guide only. All work must be done by a licensed electrician. Get help with this code

HVRT

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

SDT G2 three-phase string (4-25kW) · Guide only. All work must be done by a licensed electrician. Get help with this code

Self Check

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

SDT G2 three-phase string (4-25kW) · Guide only. All work must be done by a licensed electrician. Get help with this code

1. The PV system is short-circuited to the ground. 2. The PV system is in a moist environment and the circuit is not well insulated to the ground.

What you can do

• Do not touch the panels, rooftop isolators or DC cables
• Note the code and whether it appears in wet weather or early morning - this helps the electrician
• If it clears by itself once things dry out, still let us know if it keeps returning
• Call a licensed electrician or Total Solar - insulation and earth faults need testing with proper equipment

SDT G2 three-phase string (4-25kW) · Guide only. All work must be done by a licensed electrician. Get help with this code

DC injection exceeds the allowed range.

What you can do

• Restart the system once using the owner shutdown/start-up steps in your manual
• If it comes back, call your installer

SDT G2 three-phase string (4-25kW) · Guide only. All work must be done by a licensed electrician. Get help with this code

The input insulation impedance to the ground decreases when the inverter is operating.

What you can do

• Do not touch the panels, rooftop isolators or DC cables
• Note the code and whether it appears in wet weather or early morning - this helps the electrician
• If it clears by itself once things dry out, still let us know if it keeps returning
• Call a licensed electrician or Total Solar - insulation and earth faults need testing with proper equipment

SDT G2 three-phase string (4-25kW) · Guide only. All work must be done by a licensed electrician. Get help with this code

Excess PV modules are connected in the series, and the open-circuit voltage is higher than the operating voltage.

What you can do

• Do not touch the DC isolators or cables
• Note the time - this often shows on cold, very sunny mornings
• Call your installer - the panel strings may need to be checked against the inverter's limits

SDT G2 three-phase string (4-25kW) · Guide only. All work must be done by a licensed electrician. Get help with this code

1. The inverter is installed in a place with poor ventilation. 2. The ambient temperature is too high. 3. The inverter is working improperly.

What you can do

• Check from a safe distance that the inverter is shaded, has clear space around it and that nothing is blocking the vents
• It usually recovers once it cools down
• If it repeats often or you can hear a noisy/failed fan, call your installer

SDT G2 three-phase string (4-25kW) · Guide only. All work must be done by a licensed electrician. Get help with this code

A fault occurs in all fans of the inverter.

What you can do

• Check from a safe distance that the inverter is shaded, has clear space around it and that nothing is blocking the vents
• It usually recovers once it cools down
• If it repeats often or you can hear a noisy/failed fan, call your installer

SDT G2 three-phase string (4-25kW) · Guide only. All work must be done by a licensed electrician. Get help with this code

EFan Fail

What you can do

• Check from a safe distance that the inverter is shaded, has clear space around it and that nothing is blocking the vents
• It usually recovers once it cools down
• If it repeats often or you can hear a noisy/failed fan, call your installer

SDT G2 three-phase string (4-25kW) · Guide only. All work must be done by a licensed electrician. Get help with this code

A fault occurs in the internal fan of the inverter.

What you can do

• Check from a safe distance that the inverter is shaded, has clear space around it and that nothing is blocking the vents
• It usually recovers once it cools down
• If it repeats often or you can hear a noisy/failed fan, call your installer

SDT G2 three-phase string (4-25kW) · Guide only. All work must be done by a licensed electrician. Get help with this code

The PV string cables arc or are in poor contact.

What you can do

• Keep clear of the inverter, panels and DC cables, and do not touch any isolators
• Note the code, date and time, and check whether the alarm is still showing in the app
• If you smell burning or see smoke, get everyone out and call 000
• Call a licensed electrician or Total Solar - an arc fault means a DC wiring or connector problem that must be inspected

SDT G2 three-phase string (4-25kW) · Guide only. All work must be done by a licensed electrician. Get help with this code

Inverter internal fault.

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

SDT G2 three-phase string (4-25kW) · Guide only. All work must be done by a licensed electrician. Get help with this code

SPI Fail

What you can do

• Check that your home Wi-Fi/internet is working and restart your router
• Wait an hour - monitoring often reconnects by itself
• If the inverter screen also shows a fault, or the alarm stays for more than a day, call your installer

SDT G2 three-phase string (4-25kW) · Guide only. All work must be done by a licensed electrician. Get help with this code

Ref 1.5V Fail

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

SDT G2 three-phase string (4-25kW) · Guide only. All work must be done by a licensed electrician. Get help with this code

AC HCT Fail

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

SDT G2 three-phase string (4-25kW) · Guide only. All work must be done by a licensed electrician. Get help with this code

GFCI Fail

What you can do

• Keep clear and do not touch the inverter or cabling
• Note the code, date and time
• Call a licensed electrician or Total Solar - this alarm means current may be leaking to earth

SDT G2 three-phase string (4-25kW) · Guide only. All work must be done by a licensed electrician. Get help with this code

Relay Check Fail

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

SDT G2 three-phase string (4-25kW) · Guide only. All work must be done by a licensed electrician. Get help with this code

EEPROM R/W Fail

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

SDT G2 three-phase string (4-25kW) · Guide only. All work must be done by a licensed electrician. Get help with this code

Communication terminal (COM)

What you can do

• Check that your home Wi-Fi/internet is working and restart your router
• Wait an hour - monitoring often reconnects by itself
• If the inverter screen also shows a fault, or the alarm stays for more than a day, call your installer

Lynx Home F G2 (HV) battery · Guide only. All work must be done by a licensed electrician. Get help with this code

SOC indicator

What you can do

• This normally means the battery is low or has reached its reserve level
• Let the system recharge from solar or the grid - check the state of charge in the app
• If the battery never charges or stays at 0% for more than a day of sunshine, call your installer

Lynx Home F G2 (HV) battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Battery system alarm

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

Lynx Home F G2 (HV) battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Battery system fault

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

Lynx Home F G2 (HV) battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Battery Overvoltage

What you can do

• Note the code and the battery state of charge shown in the app
• Let the system run - some battery voltage protections clear by themselves after charging or discharging
• If the alarm stays or keeps returning, call your installer - don't open or disconnect the battery yourself

Lynx Home F G2 (HV) battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Battery Undervoltage

What you can do

• Note the code and the battery state of charge shown in the app
• Let the system run - some battery voltage protections clear by themselves after charging or discharging
• If the alarm stays or keeps returning, call your installer - don't open or disconnect the battery yourself

Lynx Home F G2 (HV) battery · Guide only. All work must be done by a licensed electrician. Get help with this code

High Cell Temperature

What you can do

• Check from a safe distance for heat, swelling, hissing, a burning smell or smoke - if you notice any, keep everyone away and call 000
• If nothing looks wrong, make sure the battery area is shaded and ventilated and nothing is stacked against it
• Let the battery cool; most units recover by themselves
• If the alarm keeps returning, call your installer

Lynx Home F G2 (HV) battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Low Charging Temperature

What you can do

• Check from a safe distance that the inverter is shaded, has clear space around it and that nothing is blocking the vents
• It usually recovers once it cools down
• If it repeats often or you can hear a noisy/failed fan, call your installer

Lynx Home F G2 (HV) battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Overcurrent When Charging - alert shown by green button light blinking for 3 s

What you can do

• Turn off any very large loads that were running when the alarm appeared
• Wait - many over-current protections reset automatically
• If it keeps happening, call your installer

Lynx Home U (LX U5.4-L) battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Overcurrent When Discharging - alert shown by green button light blinking for 3 s

What you can do

• Turn off any very large loads that were running when the alarm appeared
• Wait - many over-current protections reset automatically
• If it keeps happening, call your installer

Lynx Home U (LX U5.4-L) battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Overvoltage - alert shown by green button light blinking for 3 s

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

Lynx Home U (LX U5.4-L) battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Under voltage - alert shown by green button light blinking for 3 s

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

Lynx Home U (LX U5.4-L) battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Low Temperature Charging - alert shown by green button light blinking for 3 s

What you can do

• Check from a safe distance that the inverter is shaded, has clear space around it and that nothing is blocking the vents
• It usually recovers once it cools down
• If it repeats often or you can hear a noisy/failed fan, call your installer

Lynx Home U (LX U5.4-L) battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Cell voltage difference extremely high - alert shown by green button light blinking for 3 s

What you can do

• Note the code and the battery state of charge shown in the app
• Let the system run - some battery voltage protections clear by themselves after charging or discharging
• If the alarm stays or keeps returning, call your installer - don't open or disconnect the battery yourself

Lynx Home U (LX U5.4-L) battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Temp. sensor failure - fault shown by red button light blinking for 3 s

What you can do

• Check from a safe distance that the inverter is shaded, has clear space around it and that nothing is blocking the vents
• It usually recovers once it cools down
• If it repeats often or you can hear a noisy/failed fan, call your installer

Lynx Home U (LX U5.4-L) battery · Guide only. All work must be done by a licensed electrician. Get help with this code

MOS Failure - fault shown by red button light blinking for 3 s

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

Lynx Home U (LX U5.4-L) battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Circuit-Breaker Failure - fault shown by red button light blinking for 3 s

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

Lynx Home U (LX U5.4-L) battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Slaver Control Communication Lost - fault shown by red button light blinking for 3 s

What you can do

• Check that your home Wi-Fi/internet is working and restart your router
• Wait an hour - monitoring often reconnects by itself
• If the inverter screen also shows a fault, or the alarm stays for more than a day, call your installer

Lynx Home U (LX U5.4-L) battery · Guide only. All work must be done by a licensed electrician. Get help with this code

SN Failure - fault shown by red button light blinking for 3 s

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

Lynx Home U (LX U5.4-L) battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Master Control Communication Lost - fault shown by red button light blinking for 3 s

What you can do

• Check that your home Wi-Fi/internet is working and restart your router
• Wait an hour - monitoring often reconnects by itself
• If the inverter screen also shows a fault, or the alarm stays for more than a day, call your installer

Lynx Home U (LX U5.4-L) battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Inconsistent Software Version - fault shown by red button light blinking for 3 s

What you can do

• Make sure the system is online so it can receive updates
• Restart the system once using the owner steps in your manual
• If the alarm stays, call your installer - settings and firmware must be fixed by them or the manufacturer

Lynx Home U (LX U5.4-L) battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Multi Master Control Failure - fault shown by red button light blinking for 3 s

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

Lynx Home U (LX U5.4-L) battery · Guide only. All work must be done by a licensed electrician. Get help with this code

MOS Overtemperature - fault shown by red button light blinking for 3 s

What you can do

• Check from a safe distance that the inverter is shaded, has clear space around it and that nothing is blocking the vents
• It usually recovers once it cools down
• If it repeats often or you can hear a noisy/failed fan, call your installer

Lynx Home U (LX U5.4-L) battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Communication Failure - fault shown by red button light blinking for 3 s

What you can do

• Check that your home Wi-Fi/internet is working and restart your router
• Wait an hour - monitoring often reconnects by itself
• If the inverter screen also shows a fault, or the alarm stays for more than a day, call your installer

Lynx Home U (LX U5.4-L) battery · Guide only. All work must be done by a licensed electrician. Get help with this code