M&C TechGroup MP47 Ex Operator's manual - Handbuch (Seite 97)

KNF Motor M 56 Ex Troubleshooting
Translation of orignal Operating and Installation Instructions, english, KNF 121220-121648 01/13 17
9. Troubleshooting
DANGER
Extreme danger from electrical shock!
Î Disconnect the motor power supply before working
on the motor.
Î Make sure the motor is de-energized and secure.
1. Check the motor (see Tab. 11).
2. Also see the pump operating and installation instructions for
troubleshooting.
Tab. 8
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.
Fault
Motor
does
not
ramp up
Motor is
too
warm Signifi-
cant
drop-off
in speed Protec-
tion
device
trips
Possible Cause Remedy
Load moment too high Check motor and load
moment
Mains voltage too low Check mains
Phase interruption Check connection network
Faulty connection Note wiring diagram and
motor type-plate
Overload Compare motor type-plate
specifications
Switches too often Verify rated operation
mode
Insufficient ventilation Inspect ventilation paths,
check turn direction
Ventilation paths dirty Clean
Winding or terminal short
circuited Measure isolation resis-
tance
Start time has been ex-
ceeded Check start-up conditions