M&C MP30 Ex Operating And Installation Instructions page 91

KNF AC Motor M 43 Ex
Fault
Motor Motor is
does too
not warm
ramp up
Translation of original Operating and Installation Instructions, english, KNF 121218-121646 01/13
9. Troubleshooting
DANGER
1. Check the motor (see Tab. 10).
2. Also see the drive-pump operating and installation instructions
for troubleshooting.
Possible Cause
Signifi- Protec-
cant tion
drop-off device
in speed trips
Load moment too high
Mains voltage too low
Phase interruption
Overload
Switches too often
Insufficient ventilation
Ventilation paths dirty
Winding or terminal short
circuited
Tab. 10
Fault cannot be rectified
If you are unable to determine any of the specified causes, send
the motor to KNF Customer Service (see page 1 for the address).
If the motor is attached to a pump, observe the instructions for the
pump.
Extreme danger from electrical shock!
Disconnect the motor power supply before working
on the motor.
Make sure the motor is de-energized and secure.
Troubleshooting
Remedy
Check motor and load
moment
Check mains
Check connection network
Compare output plate
specifications
Verify rated operation
mode
Inspect ventilation paths,
check turn direction
Clean
Measure isolation resis-
tance
16