Troubleshooting and fault elimination
8-4
820XBA1097
Display Remedy
Cause
Fault
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 current or frequent and
too long acceleration
Check drive dimensioning
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
-
Increase 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
rSt
Faulty auto-TRIP reset
More than 8 fault messages in
10 minutes
Depends on the fault message
Pr
Faulty parameter transfer
via the operating module
PAR1 and PAR2 are defective.
It is absolutely necessary to repeat the
data transfer or load the factory
setting before enabling the controller.
Pr1
Faulty PAR1 transfer via
the operating module
PAR1 is defective.
data transfer or load the factory
setting before enabling the controller.
Pr2
Faulty PAR2 transfer via
the operating module
PAR2 is defective.
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