Galt Electric G500 Series VFD Troubleshooting & Error Code

OC - Over Current
(OC 1, OC 2, OC 3)
- Cause by short circuit or overload
- Make sure you mega your motor and cables to make sure it is not short circuit
- Check your parameter group P02 to make sure your motor info is entered according to your motor nameplate
- Getting too much torque from your motor? It means your motor is overloaded; or it is accelerating too quickly. Slow down the acceleration by changing P00.11

OV - Over Voltage
(OV 1, OV 2, OV 3)
- Check your parameter group P02 to make sure your motor info is entered according to your motor nameplate
- Make sure incoming voltage is within required rating of your G500
- Possible cause: power coming back from the motor and it is going to the utility.
- You might be slowing down too fast (eg. a fan), power is pushed back to the line. Slow down your deceleration P00.12.
- If you have a downhill conveyor or elevator, you might need to install resistor on the DC bus or get a regenerative drive.

UV - Under Voltage
(UV)
- Check your parameter group P02 to make sure your motor info is entered according to your motor nameplate
-Measure voltage to make sure it is within the rated voltage of your G500
- Find out what causes the undervoltage

OL - Overload
(OL 1, OL 2)
- Check your parameter group P02 to make sure your motor info is entered according to your motor nameplate, particularly the HP and Volt parameter
- Motor is too small, underrated for your application. Get a bigger motor
- Motor is running too slow, the motor fan is not spinning fast enough to cool the motor. Program the drive to bypass it or increase run speed.

SPI - Input Phase Loss
(SPI)
- Make sure all 3 phases are attached properly. Check if wires are loose or if they are connected to the wrong phase.

SPO - Output Phase Loss
(SPO)
- Check wires to the motor to make sure the connection is tight
- Motor might have failed, test the motor to isolate your issues. Meter each phase to make sure it has the same current

OH - Overheating
(OH 1, OH 2)
- Check if VFD fans are still working
- Check ambient temperature to see if it is too hot (usually over 100°F). Add fan or AC if it is too hot.
- Drive in an enclosure? Make sure there is enough ventilation or cooling.

ETH - Ground Fault
(ETH 1, ETH 2)
- One of your three output phases is going to ground
- Could be cable insulation failing or motor failure
- Check motor conduit box to make sure nothing is touching ground inside
- Disconnect all phases, run a hipot test to see which phase is grounded. Do not run hipot test with phases connected, you will damage the VFD

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