Lenze 8200 Frequency inverters - Manual (Page 238)

Troubleshooting and fault elimination
8200SHB0199 8-3
Display Remedy Cause Fault
OC2 Earth fault Grounded motor phase Check motor; check cable OC2 Earth fault
Excessive capacitive charging current of
the motor cable Use motor cable which is shorter or has a lower
capacitance
OC3 Overload inverter during
acceleration or short circuit Acceleration time too short (C012) - Increase acceleration time
- Check drive selection
Defective motor cable Check wiring
Interturn fault in the motor Check motor
OC4 Overload controller during
deceleration Deceleration time too short (C013) - Increase deceleration time
- Check the selection of the brake resistor or
connect the brake chopper
OC5 I x t overload Frequent and too long acceleration
processes with overcurrent Check drive selection
Permanent overload with
I
motor
> 1.05 x I
rx
OC6 Overload motor Motor is thermally overloaded, for
instance, because of
- impermissible continuous current - Check drive selection
- frequent or too long acceleration
processes - Check the setting under C120
OH Heat sink temperature is
higher than the value set in
the controller Ambient temperature
T
amb
> + 40 •C or +50 •C
- Allow controller to cool and ensure ventilation
- Check the ambient temperature in the control
cabinet
Heat sink very dirty Clean heat sink
Incorrect mounting position Change mounting position
OH3 PTC monitoring Motor too hot because of excessive
currents or frequent and too long
accelerations Check drive selection
PTC not connected Connect PTC or switch-off monitoring
(C0585 = 3)
OH4 Overtemperature unit Inside unit too hot - Reduce controller load
- Improve cooling
- Check fan in the controller
OU Overvoltage Mains voltage too high Check voltage supply OU Overvoltage
Feedback operation
Braking operation - Prolong deceleration times
- For operation with brake choppers:
- Check the selection and connection of the
brake resistor
- Increase the deceleration times
Earth leakage on the motor side Check motor cable and motor for earth fault
(disconnect motor from inverter)
OUE Overvoltage Mains overvoltage longer than 5 s Check mains voltage
Pr Faulty parameter transfer
via the operating module PAR1 and PAR2 are defective
It is absolutely necessary to repeat the data
Pr1 Faulty PAR1 transfer via the
operating module PAR1 is defective
It is absolutely necessary to repeat the data
transfer or load the factory setting before
enabling the controller.
Pr2 Faulty PAR2 transfer via the
operating module PAR2 is defective
enabling the controller.
rSt Faulty auto-TRIP reset More than 8 fault messages in
10 minutes Depends on the fault message
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