VFD Fault Codes by Brand: Cross-Reference Table

The short answer

Every drive brand numbers its faults differently, but the same physical problem sits behind them. An overcurrent trip is 2310 on an ABB ACS580, F30001 on a SINAMICS G120, F012 on a PowerFlex 525, oC on a Yaskawa GA500 or V1000, Alarm 13 on a Danfoss FC 302 and OCF on a Schneider ATV320. The table below maps eight fault families across six drives, with every code taken from that maker’s manual, and the sections that follow explain what each fault means and how its timing points to the cause.

DC bus overvoltage: ACS580 3210, G120 F30002, PowerFlex 525 F005, Yaskawa ov, FC 302 Alarm 7, ATV320 ObF; most often caused by deceleration that is too fast for the load.
DC bus undervoltage: ACS580 3220, G120 F30003, PowerFlex 525 F004, Yaskawa Uv1, FC 302 Alarm 8, ATV320 USF; check the supply first.
Ground fault: ACS580 2330, G120 F30021, PowerFlex 525 F013, Yaskawa GF, FC 302 Alarm 14, ATV320 SCF3; test motor and cable insulation with them disconnected from the drive.
Codes were read from the current OEM manuals listed under Sources; firmware revisions can add codes, so check your drive’s own manual.

VFD fault code cross-reference by fault family (from each maker’s manual, read 2026-10-26)
Fault family	ABB ACS580	Siemens SINAMICS G120 (CU240B-2/E-2)	Allen-Bradley PowerFlex 525	Yaskawa GA500 / V1000	Danfoss VLT FC 302	Schneider ATV320
Overcurrent	2310 Overcurrent (2340 Short circuit)	F30001 Overcurrent (F07801 Motor overcurrent)	F012 HW OverCurrent (F041–F043 phase-to-phase short)	oC Overcurrent	Alarm 13 Over current	OCF Overcurrent (SCF1 Motor short circuit)
DC bus overvoltage	3210 DC link overvoltage	F30002 DC-link voltage overvoltage	F005 OverVoltage	ov Overvoltage	Alarm 7 DC overvoltage	ObF DC Bus Overvoltage (OSF Supply mains overvoltage)
DC bus undervoltage	3220 DC link undervoltage	F30003 DC-link voltage undervoltage	F004 UnderVoltage	Uv1 DC Bus Undervoltage	Alarm 8 DC under voltage	USF Supply Mains UnderV
Ground / earth fault	2330 Earth leakage (3181 Wiring or earth fault)	F30021 Ground fault	F013 Ground Fault (F038–F040 Phase U/V/W to Gnd)	GF Ground Fault	Alarm 14 Earth (ground) fault	SCF3 Ground Short Circuit
Motor overload	4981 External temperature 1 (motor thermal protection; source par. 35.11, default estimated temperature)	F07011 Motor overtemperature (alarm A07910 first)	F007 Motor Overload	oL1 Motor Overload	Alarm 10 Motor overload temperature (ETR)	OLF Motor Overload
Drive overtemperature	4210 IGBT overtemperature; 4290 Cooling	F30004 Inverter overtemperature	F008 Heatsink OvrTmp	oH / oH1 Heatsink Overheat	Alarm 29 Heat sink temp	OHF Drive Overheating
Input phase loss	3130 Input phase loss	F30011 Line phase failure	F003 Power Loss (single-phase operation with excessive load)	PF Input Phase Loss	Alarm 4 Mains phase loss	PHF Input Phase Loss
Output (motor) phase loss	3381 Output phase loss	F30015 Motor cable phase failure	F021 Output Ph Loss	LF Output Phase Loss	Alarms 30, 31, 32 Motor phase U/V/W missing	OPF1 Single Output Phase Loss; OPF2 Output Phase Loss
Communication loss	7510 FBA A communication; 6681 EFB comm loss	F01910 Setpoint timeout (fieldbus); F08501 Setpoint timeout (PROFINET)	F081 DSI Comm Loss; F071 DSI Net Loss; F072 Opt Net Loss; F073 EN Net Loss; F082 Opt Comm Loss	CE Modbus Communication Error; bUS Option Communication Error	Alarm 17 Control word timeout; Alarm 34 Fieldbus communication fault	CnF Fieldbus Com Interrupt; SLF1 Modbus Com Interrupt; COF CANopen Com Interrupt

Overcurrent (2310, F30001, F012, oC, Alarm 13, OCF)

The drive measured output current above its hardware or software trip limit and shut off the output transistors to protect them. ABB’s manual notes that 2310 can also be caused by an earth fault or supply phase loss, so an overcurrent code does not always mean a mechanical overload. Use timing to narrow it down:

Trips the instant you press start, even at low speed: shorted motor or cable, a ground fault, a contactor opening or closing in the motor leads, or wrong motor data. Check insulation and wiring first.
Trips during acceleration: ramp too short, torque boost too high, or a heavy or jammed load. Lengthen the acceleration time and check the load turns freely.
Trips at steady speed: a mechanical jam, a failing bearing or a sudden load step. Trend current before the trip.
Trips when a motor is caught spinning: enable the flying start (speed search) function if the application allows.

DC bus overvoltage (3210, F30002, F005, ov, Alarm 7, ObF)

The DC link voltage rose above its limit. Almost always the motor is acting as a generator and pushing energy back into the drive faster than it can be absorbed. Timing is the strongest clue: a trip during deceleration or when stopping points to a deceleration ramp that is too short or an overhauling load (lowering, high-inertia fans). Fixes are a longer deceleration time, the drive’s overvoltage controller (ABB parameter 30.30 Overvoltage control; Siemens DC-link voltage controller p1240/p1280), or a braking chopper and resistor sized per the manual. A trip at standstill or at constant speed points to high or transient supply voltage instead; ATV320 reports supply overvoltage separately as OSF.

DC bus undervoltage (3220, F30003, F004, Uv1, Alarm 8, USF)

The DC link fell below the minimum while the drive was running. The Yaskawa V1000 manual gives the detection level as about 190 V for 200 V class and about 380 V for 400 V class drives. Check in this order: a supply dip or interruption (does it coincide with other equipment starting?), a blown input fuse or missing phase, loose input terminals, then the drive’s rectifier or pre-charge circuit. A trip only at full load points to a weak supply or one missing phase.

Ground fault (2330, F30021, F013, GF, Alarm 14, SCF3)

Current is leaking from an output phase to earth, through damaged motor insulation, a chafed cable, water in a junction box, or a surge suppressor or power-factor capacitor wrongly fitted in the motor leads. A ground fault that appears immediately at start is usually insulation; one that appears after warm-up or in wet weather points to moisture. Confirm with an insulation-resistance test.

Lock out and tag out, wait for the DC bus to discharge per the drive manual, and disconnect the motor cable from the drive output terminals before any megger test. A megger voltage on the drive terminals can destroy the drive.

Motor overload, drive overheat, phase loss and comm loss

Motor overload (4981, F07011, F007, oL1, Alarm 10, OLF): the drive’s thermal model says the motor is too hot. Check that motor current, service factor and cooling settings match the nameplate; long running at low speed on a self-cooled motor is a common cause.
Drive overtemperature (4210/4290, F30004, F008, oH/oH1, Alarm 29, OHF): heat sink too hot. Check the cooling fan, dust on fins, cabinet ventilation and ambient temperature before reducing carrier frequency or load.
Input phase loss (3130, F30011, F003, PF, Alarm 4, PHF): one supply phase missing or badly unbalanced, often a blown fuse; it often shows only under load. Measure all three line voltages under load.
Output phase loss (3381, F30015, F021, LF, Alarms 30–32, OPF1/OPF2): open motor lead, loose terminal or open contactor between drive and motor. Schneider’s ATV320 manual says to set output phase-loss detection (OPL) to no error when an output contactor is used.
Communication loss (7510/6681, F01910/F08501, F071/F081 and related, CE/bUS, Alarm 17/34, CnF/SLF1/COF): the drive stopped receiving its control word. Check cable and connectors, PLC run state, network timeout setting and the drive’s comm-loss action.

For the reasoning behind these five most common trips, see our article on VFD fault codes explained.

Frequently asked questions

What does an overcurrent fault on a VFD mean?

The drive measured output current above its trip limit and switched off to protect its transistors. It is 2310 on ABB ACS580, F30001 on SINAMICS G120, F012 on PowerFlex 525, oC on Yaskawa, Alarm 13 on Danfoss FC 302 and OCF on Schneider ATV320. Timing tells you where to look: at start, suspect wiring or insulation; during acceleration, suspect the ramp or load.

What is fault F004 on a PowerFlex 525?

F004 is UnderVoltage: the DC bus voltage fell below the minimum value. Rockwell’s manual says to monitor the incoming AC line for low voltage or a line power interruption.

Why does my VFD trip on overvoltage when it decelerates?

The motor and load are returning energy to the drive faster than it can absorb. Lengthen the deceleration time, enable the drive’s overvoltage (DC bus) controller, or fit a braking chopper and resistor sized per the drive manual.

Can I megger a motor connected to a VFD?

Not with the drive connected. Lock out the supply, wait for the DC bus to discharge as stated in the manual, disconnect the motor leads from the drive output terminals, then test the motor and cable.

What causes a VFD ground fault?

Leakage from an output phase to earth, usually from damaged motor or cable insulation, moisture, or a capacitor or surge absorber wrongly fitted in the motor leads. Confirm with an insulation test of the disconnected motor and cable.

What causes DC bus undervoltage?

A supply dip or interruption, a blown input fuse or missing phase, loose input terminals, or a fault in the drive’s rectifier or pre-charge circuit. Check the supply under load first.

Is it safe to keep resetting a VFD fault?

No. Repeated resets without finding the cause can damage the drive or motor. Many drives also limit automatic restarts; the PowerFlex 525 trips F033 Auto Rstrt Tries when its programmed restart attempts are used up.