Inverters error codes

61 codes from 10 manufacturers, each with its meaning and the document it comes from. Open a code for the details, or search every system.

Magnum (22)

• High BatteryHVDC — High DC battery voltage. External charge source has driven battery voltage above the inverter's…
• Low BatteryLVDC — Low DC battery voltage. Inverter shut down to protect battery.
• OvertempHigh temperature. Thermal protection has shut the inverter down.
• AC OverloadOver-current. AC load draw exceeds inverter rating.
• High Volts ACHigh Volts AC - a very high AC input voltage (>150 VAC) was detected on the AC input; the charger is disabled…
• Stuck RelayStuck relay — transfer switch relay welded or failed.
• Internal Charger1Charger fault — charger section internal fault.
• No Inverter CommNo Inverter Comm - the remote is not receiving any communication data from the inverter via the Magnum…
• AC BackfeedAC voltage from an external AC source was detected on the inverter's AC output - the inverter shut down; an…
• Breaker TrippedThe AC input breaker on the inverter/charger opened due to excess current flow through the inverter to the AC…
• Dead Battery ChargeThe unit is trying to enter Charge mode but detected a very discharged bank (below 9 V on 12 V; 18 V / 36 V…
• FET OverloadThe inverter/charger shut down because the internal FET temperature rose abnormally fast; a manual restart is…
• High Batt TempThe inverter/charger shut down because the Battery Temperature Sensor (BTS) read above 54 degC / 129 degF.
• Internal Bridge1Internal fault: the FET bridge shut down after inverting because the output circuit can no longer detect AC…
• Internal NTC1Internal fault: the internal NTC temperature sensor detected a very large, unexpected temperature change.
• Internal Relay1The internal AC transfer relay is not closed while the unit is charging.
• OvercurrentThe inverter shut down to protect internal power components, typically from an excessive load on the AC…
• StackClock FaultStacking fault: a stacker cable problem, or one inverter is losing synchronization with the other inverter…
• Stack Mode FaultStacking fault: this unit detected a problem with the other stacked inverter - check that unit for a fault.
• StackPhase FaultStacking / AC-input fault: incorrect AC input wiring, a lost AC input phase, a bad internal transfer relay…
• Tfmr OvertempThe transformer Temperature Cut-Out (TCO) opened, shutting the inverter down to protect the power…
• Unknown FaultThe inverter sent a fault code the remote cannot identify (the remote shows 'Unknown Fault ##' where ## is…

Magnum MS Series (7)

• NO OUTPUT LED OFFMultiple causes: switched off, low battery, high battery, over-temp, AC overload, or internal fault.
• NO OUTPUT GREEN FLASHInverter is in Search mode — load is too small (<5W) for Search circuit detection.
• LOW OUTPUTLoose/corroded battery cables, low batteries, loose AC output connections, or wrong cable size/length.
• LOW CHARGE ACCharge rate set too low OR low AC voltage (<90 VAC).
• LOW CHARGE GENGenerator output too low to power both load and charger.
• NO CHARGELoose/corroded cables, defective batteries, wrong charger settings, or wrong AC input voltage.
• DC VOLT DRIFTBattery Temperature Sensor (BTS) adjusts charging voltage based on temperature. This is normal behavior when…

Renogy / generic (1)

• OLOverload

Renogy 1000W/2000W Inverter/Charger (9)

• Low Bat Volt (beep every 1 sec)Battery voltage dropped below 10.5 V DC low-voltage alarm threshold
• High Bat Volt (beep every 5 sec)Battery voltage exceeded 16 V DC limit
• Over-Load (red Over-Load LED on, green Inverter LED on, beep every 1 sec)Load exceeds 1000W (1000W model) or 2000W (2000W model)
• Over-Temp (red Over-Temp LED on, green Inverter LED on, beep every 1 sec)Internal temperature exceeded safe limit during inverter operation
• Over-Temp AC Source (red Over-Temp LED, yellow Charger-in-Boost, green AC Source, beep every 1 sec)Internal temperature exceeded during CHARGING (shore/generator in)
• Over Charge (yellow Charger-in-Boost LED on, green AC Source, beep every 1 sec)Charge output exceeded expected value (algorithm issue or sensor fault)
• Fan Lock (continuous beep, no other LEDs)Cooling fan mechanically stuck or motor failed
• Output Short (red Over-Load LED, continuous beep)Short circuit detected on AC output
• Back Feed Short (continuous beep, no other LEDs)Incorrect AC source connection causing feedback into inverter output

Victron Energy (1)

• VE.Bus error 15VE.Bus combination error — VE.Bus products or firmware versions are incompatible

Victron VE.Bus (MultiPlus / Quattro) (7)

• 3Not all, or more than, the expected devices were found in the system
• 4No other device found
• 5Overvoltage on AC out
• 6Error in DDC Program
• 7External device connected, assistant required
• 8Ground relay test failed
• 11Relay Test Fault - Installation error or possibly relay failure

WFCO WF-5110 / WF-5118 / WF-5120 (4)

• No 110 V on shore power (green LED off)Inverter does not pass through shore power to output wires
• No 110 V on battery only (green LED off)Inverter won't produce 110 V from 12 V battery
• Yellow LED on (battery backup mode - normal)The YELLOW LED indicates battery backup status - the inverter is supplying AC power from the 12 V battery (no…
• Red LED on (error code on display)The RED Fault LED indicates an inverter FAILURE - over-temperature, overload, or short-circuit shutdown; the…

Xantrex / generic inverter (1)

• E04 / E4Thermal shutdown (overheat)

Xantrex Freedom HF / similar (2)

• E02 / E2High DC input voltage
• E03 / E3Overload or AC output short

Xantrex Freedom HF / similar inverters (7)

• E01 / E1Low DC input voltage (battery sagging below cutoff)
• E05Low battery voltage warning (detected depending on the low-voltage setting) - AC output is still available…
• E06AC output overload warning - the AC load is approaching the overload-shutdown limit; AC output is still…
• E07Over-temperature warning - the internal temperature is approaching the thermal-shutdown limit; AC output is…
• E10High battery voltage (> 15.5 V) detected while in AC shore-power mode - the unit stops charging but AC…
• E11Over-temperature detected on the AC transfer relay (in AC shore-power mode) - the unit stops charging but AC…
• E12Battery is bad, or an external DC load is connected to the battery (in AC shore-power mode) - the unit stops…