Troubleshooting - M&C MP47-Z Ex Betriebsanleitung

KNF MOTOR M 56 EX
Fault
Motor Motor is
does too
not warm
ramp up
Translation of Original Operating- and Installation Instructions, english, KNF 121220-121648 09/17
9.

Troubleshooting

DANGER
1. Check the motor (see Tab. 11).
2. Also see the 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
Faulty connection
Overload
Switches too often
Insufficient ventilation
Ventilation paths dirty
Winding or terminal short
circuited
Start time has been exceed-
ed
Tab. 8
Fault cannot be rectified
If you are unable to determine any of the specified causes, send
the pump to KNF Customer Service (see last page for the ad-
dress).
If the motor is attached to a pump, observe the operating and
installation instructions for the pump.
Send the motor, together with completed Health and Safety Clear-
ance and Decontamination Form (Chapter 12), to KNF stating the
nature of the transferred medium.
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
Note wiring diagram and
motor type-plate
Compare motor type-plate
specifications
Verify rated operation
mode
Inspect ventilation paths,
check turn direction
Clean
Measure isolation re-
sistance
Check start-up conditions
18