Lenze SMD 0-25kW-4-0kW Basic I/O - Manual (Page 34)

32 Lenze 13466185 EDBSW03 v5
Troubleshooting and fault elimination
Error Cause Remedy (1)
0C1 Short-circuit or overload Short-circuit Find reason for short-circuit; check
motor cable
Excessive capacitive charging
current of the motor cable
Use shorter motor cables with
lower charging current
Acceleration time (C12) too short • Increase acceleration time
• Check controller selection
Defective motor cable Check wiring
Internal fault in motor Check motor
Frequent and long overload Check controller selection
0C2
Earth fault Grounded motor phase Check motor/motor cable
Excessive capacitive charging
current of the motor cable
Use shorter motor cables with
lower charging current
0C6
Motor overload (I 2 t overload) Motor is thermally overloaded,
due to:
• impermissable continuous
current
• frequent or too long acceleration
processes
• Check controller selection
• Check setting of c20
0H
Controller overtemperature Controller too hot inside • Reduce controller load
• Improve cooling
OU
Overvoltage on DC bus Mains voltage too high Check mains voltage
Excessively short deceleration time
or motor in generator mode
Increase deceleration time or use
dynamic braking option
Earth leakage on the motor side Check motor/motor cable
(separate motor from controller)
rSt
Faulty auto-TRIP reset More than 8 errors in 10 minutes Depends on the error
SF
Single phase fault A mains phase has been lost Check mains voltage
NOTE
In the event of an “OC6” (Motor Overload) failure there is a 3-minute delay before resetting
is possible. This is a requirement of UL508C. This delay is intended to allow time for the
motor to cool.
If power is removed when the drive is in an “OC6” fault state, when the power is restored
the “OC6” fault will still be present and the delay will still be active even if power was
removed for longer than 3 minutes.