Table 26 Inverter fault codes
Fault code Condition
12 oL2 - Drive overload on page 123
8 ov - Overvoltage
on page 123
7 oC - Overcurrent
on page 124
33 CE - Modbus communication error on page 124
6 GF - Ground fault on page 125
28 LF - Output phase loss on page 125
54 LF2 - Output current imbalance on page 125
27 PF - Input phase loss
on page 125
5 SC - Short circuit/IGBT failure
on page 126
2 or 60000 Uv1 - DC Bus undervoltage on page 126
3 or 60000 Uv2 - Control power undervoltage on page 126
4 or 60000 Uv3 - Soft charge answerback fault on page 126
17 EF3 - External fault(terminal S3) on page 127
59 STO - Safe Torque Off function activated on page 127
For other fault codes, contact us.
Fault oL2 - Drive overload
Cause The load is too large.
Remedy Decrease the load.
Cause The acceleration/deceleration times or cycle times are too short.
Remedy Contact us.
Cause Phase loss in the input power supply is causing the output current to
change.
Remedy Correct errors with the wiring for main circuit drive input power.
Make sure that there is no phase loss and repair problems.
Cause Pump restarted when it is still hot.
Remedy Wait for 60 minutes and restart the pump again. If the pump does not start,
contact us.
Fault ov - Overvoltage
Cause The deceleration time is too short and too much regenerative energy is
flowing back into the drive.
Remedy Contact us.
Cause The acceleration time is too short.
Remedy Contact us.
07/2021 - ©Atlas CopcoPage 1231950840208_A
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