Where can I find the official Felicity IVEM8048-II error code manual?

Each code on this page lists the official source manual filename and page number at the bottom. The manuals are published by Felicity on their website; we compile the codes here so you can search across all of them at once instead of opening each PDF.

Is the IVEM8048-II the same as other Felicity models?

Some Felicity units share firmware across a family of variants — the same fault codes apply to multiple model numbers. Look at the "also covers" chips below the title to see which other model numbers this page applies to.

What's the most critical code on a Felicity IVEM8048-II?

Critical-severity codes (red dot) are the ones that trip the unit offline immediately — typically short-circuit, IGBT, or BMS hardware failures. These are listed first when you filter by severity. Do not bypass them; they indicate a hardware or safety condition that requires service.

What does F02 mean on IVEM8048-II?

Fault: Bus voltage is too low. Cause: Internal bus voltage abnormally low. Fix: Restart the unit, if the error persists, contact the repair center.

What does F03 mean on IVEM8048-II?

Fault: Bus soft start fail. Cause: Internal components failed. Fix: Restart the unit, if the error persists, contact the repair center.

What does F04 mean on IVEM8048-II?

Fault: Inverter soft start fail. Cause: Internal components failed. Fix: Restart the unit, if the error persists, contact the repair center.

What does F05 mean on IVEM8048-II?

Fault: Over current or surge detected by Software. Cause: Software-detected over current or surge condition. Fix: Restart the unit, if the error persists, contact the repair center.

What does F06 mean on IVEM8048-II?

Fault: Over current or surge detected by hardware. Cause: Hardware-detected over current or surge condition. Fix: Restart the unit, if the error persists, contact the repair center.

What does F07 mean on IVEM8048-II?

Fault: Output voltage is too low. Cause: Output voltage below acceptable range, possibly due to overload. Fix: Reduce the connected load. Restart the unit, if the error persists, contact the repair center.

What does F08 mean on IVEM8048-II?

Fault: Output voltage is too high. Cause: Output voltage exceeds acceptable range. Fix: Restart the unit, if the error persists, contact the repair center.

What does F09 mean on IVEM8048-II?

Fault: Output short circuited. Cause: Short circuit on AC output wiring or connected load. Fix: Check if wiring is connected well and remove abnormal load.

What does F10 mean on IVEM8048-II?

Fault: Overload time out. Cause: Connected load has exceeded the inverter's overload capacity for too long. Fix: Reduce the connected load by switching off some equipment.

What does F11 mean on IVEM8048-II?

Fault: Battery voltage is too high. Cause: Battery voltage exceeds the inverter's allowed maximum. Fix: Check if spec and quantity of batteries are meet requirements.

What does F12 mean on IVEM8048-II?

Fault: Over current happen at DC/DC circuit. Cause: Over current detected in the DC/DC converter circuit. Fix: Restart the unit, if the error persists, contact the repair center.

What does F16 mean on IVEM8048-II?

Fault: Over current happen at PV port. Cause: Over current detected at the PV input port. Fix: Restart the unit, if the error persists, contact the repair center.

What does F17 mean on IVEM8048-II?

Fault: Fan is locked. Cause: Fan wiring not connected well or fan failure. Fix: Check if wiring is connected well. Replace the fan.

What does F18 mean on IVEM8048-II?

Fault: Over temperature happen at PV circuit. Cause: The temperature of internal PV component is over the limitation. Fix: Check whether the air flow of the unit is blocked or whether the ambient temperature is too high.

What does F19 mean on IVEM8048-II?

Fault: Over temperature happen at Convert L circuit. Cause: The temperature of Convert L battery converter component is over the limitation. Fix: Check whether the air flow of the unit is blocked or whether the ambient temperature is too high.

What does F20 mean on IVEM8048-II?

Fault: Over temperature happen at INV circuit. Cause: The temperature of internal INV component is over the limitation. Fix: Check whether the air flow of the unit is blocked or whether the ambient temperature is too high.

What does F21 mean on IVEM8048-II?

Fault: The inner temperature over. Cause: The inner temperature is over the limitation. Fix: Check whether the air flow of the unit is blocked or whether the ambient temperature is too high.

What does F22 mean on IVEM8048-II?

Fault: DCDC current sensor failed. Cause: DCDC current sensor failure. Fix: Restart the unit, if the error persists, contact the repair center.

What does F23 mean on IVEM8048-II?

Fault: No.2 DCDC current sensor failed. Cause: Second DCDC current sensor failure. Fix: Restart the unit, if the error persists, contact the repair center.

What does F24 mean on IVEM8048-II?

Fault: Inverter current sensor failed. Cause: Inverter current sensor failure. Fix: Restart the unit, if the error persists, contact the repair center.

What does F25 mean on IVEM8048-II?

Fault: OP current sensor failed. Cause: Output current sensor failure. Fix: Restart the unit, if the error persists, contact the repair center.

What does F26 mean on IVEM8048-II?

Fault: Sharing current sensor failed. Cause: Current-sharing sensor failure (parallel system). Fix: Restart the unit, if the error persists, contact the repair center.

What does F29 mean on IVEM8048-II?

Fault: DC/DC soft start fail. Cause: DC/DC converter soft start failure. Fix: Restart the unit, if the error persists, contact the repair center.

What does F31 mean on IVEM8048-II?

Fault: Over temperature happen at convert H circuit. Cause: The temperature of internal convert H component is over the limitation. Fix: Check whether the air flow of the unit is blocked or whether the ambient temperature is too high.

What does F32 mean on IVEM8048-II?

Fault: Over temperature happen at LLC TX. Cause: The temperature of internal DC/DC TX is over the limitation. Fix: Check whether the air flow of the unit is blocked or whether the ambient temperature is too high.

What does F33 mean on IVEM8048-II?

Fault: Over current happen at LLC circuit. Cause: Over current detected in the LLC circuit. Fix: Restart the unit, if the error persists, contact the repair center.

What does F34 mean on IVEM8048-II?

Fault: DC/DC hardware overflows. Cause: DC/DC converter hardware overflow. Fix: Restart the unit, if the eror happens again, contact the repair center.

What does F35 mean on IVEM8048-II?

Fault: Overvoltage occurs in BUS. Cause: AC surge or PV surge or internal components failed. Fix: Restart the unit, if the error persists, contact the repair center.

What does F42 mean on IVEM8048-II?

Fault: Synchronization data loss. Cause: Synchronization data loss in parallel communication. Fix: 1. Check if communication cables are connected well and restart the inverter. 2. if the problem remains, please contact your installer.

What does F45 mean on IVEM8048-II?

Fault: The output current of each inverter is different. Cause: Output current imbalance between parallel inverters. Fix: 1. Check if sharing cables are connected well and restart the inverter. 2. if the problem remains, please contact your installer.

What does F47 mean on IVEM8048-II?

Fault: Generator current sensor failed. Cause: Generator current sensor failure. Fix: Restart the unit, if the error persists, contact the repair center.

What does W01 mean on IVEM8048-II?

Warning: Fan is locked. Beep three times every second. Cause: Fan wiring not connected well or fan failure. Fix: Check if the Fans wiring connected well. Replace the fan.

What does W03 mean on IVEM8048-II?

Warning: Low battery. Beep once every second. Cause: Battery voltage is too low. Fix: The battery voltage is too low, it should be charging.

What does W04 mean on IVEM8048-II?

Warning: Grid anomaly. Grid icon blinking. Cause: Grid input is over voltage or over frequency. Fix: Check whether the input is overvoltage or overfrequency.

IVEM8048-II

Inverter56 codes

also coversIVEM12048-IIIVEM 8K-12K Series II

42 Fault 14 Warning

About the Felicity IVEM8048-II

The Felicity IVEM8048-II is a Inverter unit covered by a shared firmware family that includes 3 variants. The error codes listed below apply to every variant in this family — IVEM8048-II, IVEM12048-II, IVEM 8K-12K Series II. If your unit's exact model number isn't shown in the title but is listed in the "also covers" tags, this is the correct reference page.

How to use this page

Each row below shows an error code, its severity, and a brief description. Click any row to expand the full cause and the recommended fix. The severity dot tells you whether the unit will keep operating (warning), derate (fault), or trip offline (critical). For codes that require an authorized service partner, the recommended-fix block says so explicitly.

F01Bus voltage is too high.Fault

Description

Fault: Bus voltage is too high. Inverter cuts off output, fault LED solid on, ERROR icon shown on LCD.

Cause

AC Surge or internal components failed.

Recommended fix

Restart the unit, if the error persists, contact the repair center.

Source:IVEM8K-12K-II_compressed.pdf · page 42

F02Bus voltage is too low.Fault

Description

Fault: Bus voltage is too low.

Cause

Internal bus voltage abnormally low.

Recommended fix

Restart the unit, if the error persists, contact the repair center.

Source:IVEM8K-12K-II_compressed.pdf · page 43

F03Bus soft start fail.Fault

Description

Fault: Bus soft start fail.

Cause

Internal components failed.

Recommended fix

Restart the unit, if the error persists, contact the repair center.

Source:IVEM8K-12K-II_compressed.pdf · page 43

F04Inverter soft start fail.Fault

Description

Fault: Inverter soft start fail.

Cause

Internal components failed.

Recommended fix

Restart the unit, if the error persists, contact the repair center.

Source:IVEM8K-12K-II_compressed.pdf · page 43

F05Over current or surge detected by Software.Fault

Description

Fault: Over current or surge detected by Software.

Cause

Software-detected over current or surge condition.

Recommended fix

Restart the unit, if the error persists, contact the repair center.

Source:IVEM8K-12K-II_compressed.pdf · page 43

F06Over current or surge detected by hardware.Fault

Description

Fault: Over current or surge detected by hardware.

Cause

Hardware-detected over current or surge condition.

Recommended fix

Restart the unit, if the error persists, contact the repair center.

Source:IVEM8K-12K-II_compressed.pdf · page 43

F07Output voltage is too low.Fault

Description

Fault: Output voltage is too low.

Cause

Output voltage below acceptable range, possibly due to overload.

Recommended fix

Reduce the connected load. Restart the unit, if the error persists, contact the repair center.

Source:IVEM8K-12K-II_compressed.pdf · page 43

F08Output voltage is too high.Fault

Description

Fault: Output voltage is too high.

Cause

Output voltage exceeds acceptable range.

Recommended fix

Restart the unit, if the error persists, contact the repair center.

Source:IVEM8K-12K-II_compressed.pdf · page 43

F09Output short circuited.Fault

Description

Fault: Output short circuited.

Cause

Short circuit on AC output wiring or connected load.

Recommended fix

Check if wiring is connected well and remove abnormal load.

Source:IVEM8K-12K-II_compressed.pdf · page 43

F10Overload time out.Fault

Description

Fault: Overload time out.

Cause

Connected load has exceeded the inverter's overload capacity for too long.

Recommended fix

Reduce the connected load by switching off some equipment.

Source:IVEM8K-12K-II_compressed.pdf · page 43

F11Battery voltage is too high.Fault

Description

Fault: Battery voltage is too high.

Cause

Battery voltage exceeds the inverter's allowed maximum.

Recommended fix

Check if spec and quantity of batteries are meet requirements.

Source:IVEM8K-12K-II_compressed.pdf · page 43

F12Over current happen at DC/DC circuit.Fault

Description

Fault: Over current happen at DC/DC circuit.

Cause

Over current detected in the DC/DC converter circuit.

Recommended fix

Restart the unit, if the error persists, contact the repair center.

Source:IVEM8K-12K-II_compressed.pdf · page 43

F13PV voltage is too high.Fault

Description

Fault: PV voltage is too high.

Cause

PV array open-circuit voltage exceeds the inverter's maximum input voltage.

Recommended fix

Reduce the number of PV modules in series.

Source:IVEM8K-12K-II_compressed.pdf · page 43

F14Short circuited happen at PV port.Fault

Description

Fault: Short circuited happen at PV port.

Cause

Short circuit detected at the PV input port or wiring.

Recommended fix

Check if wiring is connected well.

Source:IVEM8K-12K-II_compressed.pdf · page 43

F15PV power is abnormal.Fault

Description

Fault: PV power is abnormal.

Cause

PV input power exceeds the inverter's allowed maximum.

Recommended fix

Reduce the number of PV modules.

Source:IVEM8K-12K-II_compressed.pdf · page 43

F16Over current happen at PV port.Fault

Description

Fault: Over current happen at PV port.

Cause

Over current detected at the PV input port.

Recommended fix

Restart the unit, if the error persists, contact the repair center.

Source:IVEM8K-12K-II_compressed.pdf · page 43

F17Fan is locked.Fault

Description

Fault: Fan is locked.

Cause

Fan wiring not connected well or fan failure.

Recommended fix

Check if wiring is connected well. Replace the fan.

Source:IVEM8K-12K-II_compressed.pdf · page 43

F18Over temperature happen at PV circuit.Fault

Description

Fault: Over temperature happen at PV circuit.

Cause

The temperature of internal PV component is over the limitation.

Recommended fix

Check whether the air flow of the unit is blocked or whether the ambient temperature is too high.

Source:IVEM8K-12K-II_compressed.pdf · page 43

F19Over temperature happen at Convert L circuit.Fault

Description

Fault: Over temperature happen at Convert L circuit.

Cause

The temperature of Convert L battery converter component is over the limitation.

Recommended fix

Check whether the air flow of the unit is blocked or whether the ambient temperature is too high.

Source:IVEM8K-12K-II_compressed.pdf · page 43

F20Over temperature happen at INV circuit.Fault

Description

Fault: Over temperature happen at INV circuit.

Cause

The temperature of internal INV component is over the limitation.

Recommended fix

Check whether the air flow of the unit is blocked or whether the ambient temperature is too high.

Source:IVEM8K-12K-II_compressed.pdf · page 43

F21The inner temperature over.Fault

Description

Fault: The inner temperature over.

Cause

The inner temperature is over the limitation.

Recommended fix

Check whether the air flow of the unit is blocked or whether the ambient temperature is too high.

Source:IVEM8K-12K-II_compressed.pdf · page 44

F22DCDC current sensor failed.Fault

Description

Fault: DCDC current sensor failed.

Cause

DCDC current sensor failure.

Recommended fix

Restart the unit, if the error persists, contact the repair center.

Source:IVEM8K-12K-II_compressed.pdf · page 44

F23No.2 DCDC current sensor failed.Fault

Description

Fault: No.2 DCDC current sensor failed.

Cause

Second DCDC current sensor failure.

Recommended fix

Restart the unit, if the error persists, contact the repair center.

Source:IVEM8K-12K-II_compressed.pdf · page 44

F24Inverter current sensor failed.Fault

Description

Fault: Inverter current sensor failed.

Cause

Inverter current sensor failure.

Recommended fix

Restart the unit, if the error persists, contact the repair center.

Source:IVEM8K-12K-II_compressed.pdf · page 44

F25OP current sensor failed.Fault

Description

Fault: OP current sensor failed.

Cause

Output current sensor failure.

Recommended fix

Restart the unit, if the error persists, contact the repair center.

Source:IVEM8K-12K-II_compressed.pdf · page 44

F26Sharing current sensor failed.Fault

Description

Fault: Sharing current sensor failed.

Cause

Current-sharing sensor failure (parallel system).

Recommended fix

Restart the unit, if the error persists, contact the repair center.

Source:IVEM8K-12K-II_compressed.pdf · page 44

F27The AC input and output wires are inversely connected.Fault

Description

Fault: The AC input and output wires are inversely connected.

Cause

AC input and output wires connected reversely.

Recommended fix

1. Please check AC input and output wires are connected correctly. 2. if this error happens during parallel installation, please check wires connection. if they are connected correctly, please funish parallel installation first, and then restart inverters. 3. if the problem remains, please contact your installer.

Source:IVEM8K-12K-II_compressed.pdf · page 44

F28Single unit is installed to parallel system.Fault

Description

Fault: Single unit is installed to parallel system.

Cause

A single unit is detected as installed in a parallel system.

Recommended fix

1. Please check if single unit is installed to parallel system. 2. if this error happens during parallel installation, please check wires connectiotn. if they are connected correctly, please funish parallel installation first, and then restart inverters. 3. if the problem remains, please contact your installer.

Source:IVEM8K-12K-II_compressed.pdf · page 44

F29DC/DC soft start fail.Fault

Description

Fault: DC/DC soft start fail.

Cause

DC/DC converter soft start failure.

Recommended fix

Restart the unit, if the error persists, contact the repair center.

Source:IVEM8K-12K-II_compressed.pdf · page 44

F31Over temperature happen at convert H circuit.Fault

Description

Fault: Over temperature happen at convert H circuit.

Cause

The temperature of internal convert H component is over the limitation.

Recommended fix

Check whether the air flow of the unit is blocked or whether the ambient temperature is too high.

Source:IVEM8K-12K-II_compressed.pdf · page 44

F32Over temperature happen at LLC TX.Fault

Description

Fault: Over temperature happen at LLC TX.

Cause

The temperature of internal DC/DC TX is over the limitation.

Recommended fix

Check whether the air flow of the unit is blocked or whether the ambient temperature is too high.

Source:IVEM8K-12K-II_compressed.pdf · page 44

F33Over current happen at LLC circuit.Fault

Description

Fault: Over current happen at LLC circuit.

Cause

Over current detected in the LLC circuit.

Recommended fix

Restart the unit, if the error persists, contact the repair center.

Source:IVEM8K-12K-II_compressed.pdf · page 44

F34DC/DC hardware overflows.Fault

Description

Fault: DC/DC hardware overflows.

Cause

DC/DC converter hardware overflow.

Recommended fix

Restart the unit, if the eror happens again, contact the repair center.

Source:IVEM8K-12K-II_compressed.pdf · page 44

F35Overvoltage occurs in BUS.Fault

Description

Fault: Overvoltage occurs in BUS.

Cause

AC surge or PV surge or internal components failed.

Recommended fix

Restart the unit, if the error persists, contact the repair center.

Source:IVEM8K-12K-II_compressed.pdf · page 44

F40CAN data loss.Fault

Description

Fault: CAN data loss.

Cause

CAN communication data loss between parallel inverters.

Recommended fix

1. Check if communication cables are connected well and restart the inverter. 2. if the problem remains, please contact your installer.

Source:IVEM8K-12K-II_compressed.pdf · page 44

F41Host data loss.Fault

Description

Fault: Host data loss.

Cause

Host data loss in parallel communication.

Recommended fix

1. Check if communication cables are connected well and restart the inverter. 2. if the problem remains, please contact your installer.

Source:IVEM8K-12K-II_compressed.pdf · page 44

F42Synchronization data loss.Fault

Description

Fault: Synchronization data loss.

Cause

Synchronization data loss in parallel communication.

Recommended fix

1. Check if communication cables are connected well and restart the inverter. 2. if the problem remains, please contact your installer.

Source:IVEM8K-12K-II_compressed.pdf · page 44

F43Current feedback into the inverter is detected.Fault

Description

Fault: Current feedback into the inverter is detected.

Cause

Reverse current feedback detected at the inverter.

Recommended fix

1. Restart the inverter. 2. Check if L/N cables are not connected reversely in all inverters. 3. For parallel system in single phase, make sure the sharing cables are connected in all inverters. For supporting three-phase system, make sure the sharing cables are connected in the inverters in the same phase, and disconnected in the inverters in different phases. 4. if the problem remains, please contact your installer.

Source:IVEM8K-12K-II_compressed.pdf · page 45

F44The firmware version of each inverter is not the same.Fault

Description

Fault: The firmware version of each inverter is not the same.

Cause

Firmware versions on parallel inverters do not match.

Recommended fix

1. Update all inverter firmware to the same version. 2. Check the version of each inverter via LCD setting and make sure the CPU versions are same. if not, please contact your installer to provide the firmware to update. 3. After updating, if the problem still remains, please contact your installer.

Source:IVEM8K-12K-II_compressed.pdf · page 45

F45The output current of each inverter is different.Fault

Description

Fault: The output current of each inverter is different.

Cause

Output current imbalance between parallel inverters.

Recommended fix

1. Check if sharing cables are connected well and restart the inverter. 2. if the problem remains, please contact your installer.

Source:IVEM8K-12K-II_compressed.pdf · page 45

F46AC output mode setting is different.Fault

Description

Fault: AC output mode setting is different.

Cause

AC output mode setting (LCD program 28) does not match across parallel units.

Recommended fix

1. Switch off the inverter and check LCD setting program 28. 2. For parallel system in single phase, make sure no 3P1, 3P2 or 3P3 is set on program 28. For supporting three-phase system, make sure no 'PAL' is set on program 28. 3. if the problem remains, please contact your installer.

Source:IVEM8K-12K-II_compressed.pdf · page 45

F47Generator current sensor failed.Fault

Description

Fault: Generator current sensor failed.

Cause

Generator current sensor failure.

Recommended fix

Restart the unit, if the error persists, contact the repair center.

Source:IVEM8K-12K-II_compressed.pdf · page 45

W01Fan is locked.Warning

Description

Warning: Fan is locked. Beep three times every second.

Cause

Fan wiring not connected well or fan failure.

Recommended fix

Check if the Fans wiring connected well. Replace the fan.

Source:IVEM8K-12K-II_compressed.pdf · page 42

W02Overload.Warning

Description

Warning: Overload. Beep twice every second.

Cause

Connected load exceeds the inverter capacity.

Recommended fix

Reduce the loads.

Source:IVEM8K-12K-II_compressed.pdf · page 42

W03Low battery.Warning

Description

Warning: Low battery. Beep once every second.

Cause

Battery voltage is too low.

Recommended fix

The battery voltage is too low, it should be charging.

Source:IVEM8K-12K-II_compressed.pdf · page 42

W04Grid anomaly.Warning

Description

Warning: Grid anomaly. Grid icon blinking.

Cause

Grid input is over voltage or over frequency.

Recommended fix

Check whether the input is overvoltage or overfrequency.

Source:IVEM8K-12K-II_compressed.pdf · page 42

W05Three-phase input missing phase.Warning

Description

Warning: Three-phase input missing phase. Fault LED flashing.

Cause

Three-phase mains input is not normal (missing phase).

Recommended fix

Check whether the three-phase mains input is normal.

Source:IVEM8K-12K-II_compressed.pdf · page 42

W06The three-phase parallel is abnormal.Warning

Description

Warning: The three-phase parallel is abnormal. Fault LED flashing.

Cause

Three-phase parallel communication is abnormal.

Recommended fix

Verify that the three-phase communication is normal.

Source:IVEM8K-12K-II_compressed.pdf · page 42

W07Generator anomaly.Warning

Description

Warning: Generator anomaly. Generator icon blinking.

Cause

Generator input is over voltage or over frequency.

Recommended fix

Check whether the input is overvoltage or overfrequency.

Source:IVEM8K-12K-II_compressed.pdf · page 42

W08Three-phase parallel generator input phase deficiency.Warning

Description

Warning: Three-phase parallel generator input phase deficiency. Fault LED flashing.

Cause

Three-phase mains input is not normal (missing phase) on generator input.

Recommended fix

Check whether the three-phase mains input is normal.

Source:IVEM8K-12K-II_compressed.pdf · page 42

W50BMS firmware version is not matched.Warning

Description

Warning: BMS firmware version is not matched.

Cause

BMS firmware version mismatch.

Recommended fix

Upgrade the firmware of BMS.

Source:IVEM8K-12K-II_compressed.pdf · page 42

W51BMS doesn't allow inverter to charge battery.Warning

Description

Warning: BMS doesn't allow inverter to charge battery. Inverter will stop charging battery automatically.

Cause

BMS has prohibited charging the battery.

Recommended fix

Inverter will stop charging battery automatically.

Source:IVEM8K-12K-II_compressed.pdf · page 42

W52BMS doesn't allow inverter to discharge battery.Warning

Description

Warning: BMS doesn't allow inverter to discharge battery. Inverter will stop discharging battery automatically.

Cause

BMS has prohibited discharging the battery.

Recommended fix

Inverter will stop discharging battery automatically.

Source:IVEM8K-12K-II_compressed.pdf · page 42

W53BMS require inverter to charge battery.Warning

Description

Warning: BMS require inverter to charge battery. Inverter will charge battery automatically.

Cause

BMS is requesting the inverter to charge the battery.

Recommended fix

Inverter will charge battery automatically.

Source:IVEM8K-12K-II_compressed.pdf · page 42

W54-W65BMS detect something wrongs happened.Warning

Description

Warning: BMS detect something wrongs happened (range covers BMS internal alarm codes 54 through 65).

Cause

BMS has detected an internal fault or abnormal condition.

Recommended fix

If the code is keeping for long time, please contact with your installer.

Source:IVEM8K-12K-II_compressed.pdf · page 42

W80The BMS communication is abnormal.Warning

Description

Warning: The BMS communication is abnormal. Beep once every second.

Cause

BMS communication cable is not properly connected or communication failure.

Recommended fix

Check whether the BMS communication cable is connected.

Source:IVEM8K-12K-II_compressed.pdf · page 42

Step-by-step troubleshooting checklist

1.Note the exact code and timing
Write down the exact code shown on the display, what the unit was doing when it appeared (charging, discharging, idle, grid-tied), and any LEDs or audible alarms. The same code can have different fixes depending on context.
2.Check the recommended fix on this page
Find the code in the list below and read the cause + recommended fix. Most warning-level codes can be cleared by following the listed action — usually reducing load, checking wiring, or restarting the unit.
3.Verify the source manual page
Each code shows the source manual filename and page number. Open that exact page in the official manual to verify model-specific notes (firmware version, parallel-config notes, regional variants) before acting.
4.Disconnect AC, DC, and battery before opening
If a fix requires opening the enclosure or accessing terminals, disconnect AC input, DC PV, and battery in that order. Wait at least 60 seconds for capacitors to discharge before touching any conductors.
5.Escalate critical codes to authorized service
Critical codes (short-circuit, IGBT failure, BMS hardware error) should not be cleared by end users. Note the code, model number, and source manual page, then contact an authorized service partner.

Common questions about IVEM8048-II error codes

Where can I find the official Felicity IVEM8048-II error code manual?: Each code on this page lists the official source manual filename and page number at the bottom. The manuals are published by Felicity on their website; we compile the codes here so you can search across all of them at once instead of opening each PDF.
Is the IVEM8048-II the same as other Felicity models?: Some Felicity units share firmware across a family of variants — the same fault codes apply to multiple model numbers. Look at the "also covers" chips below the title to see which other model numbers this page applies to.
What's the most critical code on a Felicity IVEM8048-II?: Critical-severity codes (red dot) are the ones that trip the unit offline immediately — typically short-circuit, IGBT, or BMS hardware failures. These are listed first when you filter by severity. Do not bypass them; they indicate a hardware or safety condition that requires service.