150 Troubleshooting, Diagnoses and Maintenance Emotron AB 01-4429-01r2
Deviation
CRANE board detecting deviation in motor
operation.
NOTE: Only used in Crane Control.
- Check encoder signals
- Check Deviation jumper on Crane option board.
Pump
No master pump can be selected due to error
in feedback signalling.
NOTE: Only used in Pump Control.
-Check cables and wiring for Pump feedback signals
- Check settings with regard to the pump feedback
digital inputs
Over temp
Heatsink temperature too high:
- Too high ambient temperature of the
VSD
- Insufficient cooling
- Too high current
- Blocked or stuffed fans
- Check the cooling of the VSD cabinet.
- Check the functionality of the built-in fans. The fans
must switch on automatically if the heatsink tempera-
ture gets too high. At power up the fans are briefly
switched on.
- Check VSD and motor rating
- Clean fans
Over curr F
Motor current exceeds the peak VSD current:
- Too short acceleration time.
-Too high motor load
- Excessive load change
- Soft short-circuit between phases or
phase to earth
- Poor or loose motor cable connections
- Too high IxR Compensation level
- Check the acceleration time settings and
make them longer if necessary.
- Check the motor load.
- Check on bad motor cable connections
- Check on bad earth cable connection
- Check on water or moisture in the motor housing and
cable connections.
- Lower the level of IxR Compensation [352]
Over volt D(eceleration) Too high DC Link voltage:
- Too short deceleration time with
respect to motor/machine inertia.
- Too small brake resistor malfunctioning
Brake chopper
- Check the deceleration time settings and make them
longer if necessary.
- Check the dimensions of the brake resistor and the
functionality of the Brake chopper (if used)
Over volt G(enerator)
Over volt (Mains)
Too high DC Link voltage, due to too high
mains voltage
- Check the main supply voltage
- Try to take away the interference cause or use other
main supply lines.
O(ver) volt M(ains) cut
Over speed
Motor speed measurement exceeds maxi-
mum level.
Check encoder cables, wiring and setup
Check motor data setup [22x]
Perform short ID-run
Under voltage
Too low DC Link voltage:
- Too low or no supply voltage
- Mains voltage dip due to starting other
major power consuming machines on
the same line.
- Make sure all three phases are properly connected
and that the terminal screws are tightened.
- Check that the mains supply voltage is within the limits
of the VSD.
- Try to use other mains supply lines if dip is caused by
other machinery
- Use the function low voltage override [421]
Power Fault Overload condition in the DC-link:
- Hard short-circuit between phases or
phase to earth
- Saturation of current measurement
circuiting
-Earth fault
- Desaturation of IGBTs
- Peak voltage on DC link
- Check on bad motor cable connections
- Check on bad earth cable connection
- Check on water or moisture in the motor housing and
cable connections
- Check that rating plate data of the motor is correctly
entered
- See overvoltage trips
Desat
Power Fault Error on power board. - Check mains supply voltage
Fan Error Error in fan module
- Check for clogged air inlet filters in panel door and
blocking material in fan module.
HCB Error * Error in controlled rectifier module (HCB) - Check mains supply voltage
Table 31 Trip condition, their possible causes and remedial action
Trip condition Possible Cause Remedy
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