Lenze E931Ex - Manual (Page 41)

Troubleshooting and fault elimination
Error message
7
l
41 GHB 13.0001−EN EN 3.0
Remedy Cause Reaction Red LED is
blinking Remedy Cause
O W h A
Red LED is
blinking
6x þ − − − Overcurrent / short
circuit Check motor cable and motor phases with
regard to a short circuit of the phases or
the drive
5x þ − − − System error Switch off and then reconnect control
voltage. If the error re−occurs, send in the
drive.
4x þ ¨ − − Overtemperature drive
controller l Check correct mounting in the control
cabinet:
– Heatsink has to fit extensively to the
housing of the control cabinet.
– Are further heat sources mounted
near the drive controller, bringing
about an increased ambient
temperature of the inverter?
l Check whether the ventilation slots of
the drive controller are soiled or
blocked. If required, clean.
l Optimise controller settings (bad
settings result in an unnecessary
heating). (
, 931E Software Manual)
l Check resolver adjustment. ( , 931E
Software Manual)
l Reduce load torque of the motor.
3x þ ¨ ¨ ¨ Overtemperature motor l Check whether the motor cooling via
the motor housing is prevented by
deposits, etc.(if required, cleaning of the
motor).
l Are there further heat sources near the
motor, bringing about an additional
increase in the predominant ambient
temperature, and thus contributing to a
diminution of the dissipation of lost
heat?
l Check controller settings, bad settings
result in an unnecessary heating.
(
, 931E Software Manual)
l Reduce load torque of the motor.
l Check setting of the thermal sensor.
l Check resolver cable or encoder cable
with regard to open circuit.
l Check resolver adjustment. ( , 931E
Software Manual)
2x þ ¨ ¨ ¨ Undervoltage in the DC
bus
l Check DC−bus voltage, if required,
adjust undervoltage trigger level.
(
, 931E Software Manual)
1x ¨ ¨ þ ¨ MMC not connected l Check setting of multimedia card
(MMC).
l Connect MMC.
l Change setting of the error tracking
system by means of the
parameterisation software.