Lenze SMD 0-25kW-4-0kW - Manual (Page 21)

Lenze 13435747 EDBSX03 v17 EN, DE, FR, IT, ES 19
Troubleshooting and fault elimination
Error Cause Remedy (1)
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
Sd5 Loss of 4-20 mA reference 4-20 mA signal is below 2 mA
(C34 = 4)
Check signal/signal wire
SF Single phase fault A mains phase has been lost Check mains voltage
(1) The drive can only be restarted if the error message has been reset; see c70
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.