Emotron EMX-B, Instruction Manual

Page: 45 / 60

CG Drives & Automation 01-6048-01r3
Troubleshooting 41
4. Troubleshooting
4.1 Trip conditions, causes and remedial
action
Check that:
• the equipment has been correctly installed, i.e. the cables are properly
stripped, that there are no loose cables, etc.
• motor and control unit of corresponding type size.
• check that the DIP switches are correctly set before powering the unit on.
Power cables should not be clamped together with e.g. RS485 or analogue
cables to avoid EMI.
It is always possible to test run the drive system using the TEST switch located
on the control board, see Fig. 5, page 16 and Fig. 6, page 17. The switch has
two fixed positions, when it is in the up position, the motor accelerates to its
maximum speed independent of the control signal but dependent on DIP 1-4,
and when it is in the down position the rotation speed is set by the control
signal.
If any of the following is observed, then diagnosis should be performed to
rectify the fault.
• Motor does not reach the intended speed.
• Motor has noisy operation at reduced speed.
• High motor speed and noisy operation.
• Motor does not start to rotate.
• Control unit trips with LEDs indicating overload condition immediately
after power up without heat exchanger wheel connected.
• Control unit trips with LEDs indicating short circuit condition immediately
after power up when no heat exchanger wheel connected.
Diagnosis:
1. Check the cable connections.
2. If the connections are proper, then replace the motor alone and check for
the performance.
3. If performance is not as intended, replace the control unit.
4. Perform a motor diagnosis if the performance is not as intended after
replacing both motor and control unit.