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Error codes by brand

Koyoe error codes

13 codes documented in Koyoe's inverter and battery manuals. Pick yours to see what it means, what you can safely check, and when to call your installer.

WattMate is not affiliated with Koyoe. This page summarises Koyoe's own published documentation; your installer and Koyoe are the authority on your system. WattMate doesn't repair systems or make site visits.

Battery codes

  • Battery Over Temperature FaultBattery temperature exceeds safe ranges
  • Battery Voltage Low FaultVoltage of the battery pack is below threshold
  • BMS Communication FaultCommunication failure between the battery pack and the inverter
  • Bus Voltage HighInternal bus voltage exceeds limits
  • GFCI FaultGround Fault Circuit Interrupter fault due to high grounding current
  • Grid Frequency FaultGrid frequency is out of acceptable range
  • Grid Voltage FaultGrid voltage is out of acceptable range
  • Inverter Module Over Temperature FaultTemperature of inverter module is high
  • Isolation FaultFault in inverter isolation; potential grounding issue
  • Low Ambient Temperature WarnAmbient temperature is too low for operations
  • Off Grid Over Voltage FaultExcessive voltage from off-grid output
  • PV Overvoltage FaultPV input voltage exceeds allowable maximum
  • SPI Communication FaultMaster-slave DSP communication failure

Find the Koyoe manual for your model

When to call your installer or the warranty line

Your installer is your first warranty contact. If they've gone, the manufacturer's warranty line still covers the hardware. Don't open the inverter or battery case yourself: work inside it is for a licensed electrician.

If you see smoke, scorch marks or smell burning, switch the system off at the AC and PV isolators and call your installer. If anyone is in danger, call 000.

We don't have a warranty line on file for Koyoe yet. See the manufacturer contacts we do hold, or ask your installer.

  1. Try the free fixes first

    Most faults are an isolator, a WiFi drop or a known error code. Start with the lookup and guides above.

  2. Then call the people who are responsible for it

    Your installer is your first warranty contact. If they've gone, the manufacturer's warranty line still covers the hardware.

    Find the manufacturer's warranty line

  3. If it's near the end of its life, see what replacing it would do

    A free energy audit report sizes a new system for your actual bills and shows what a replacement would do. Your first results need no details; your details only reach installers if you ask for the full report.

    Get your free energy audit report