198 Troubleshooting, Diagnoses and Maintenance CG Drives & Automation 01-7492-01r1
Over speed
Motor speed measurement exceeds
maximum level. 110% of max speed (all
parameter sets).
- 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 con-
nected and that the terminal screws are tight-
ened.
- Check that the mains supply voltage is within the
limits of the AC drive.
- Try to use other mains supply lines if dip is caused
by other machinery
- Use the function low voltage override [421]
LC Level
Low liquid cooling level in external reservoir.
External input (DigIn 1-8) active:
- active low function on the input.
NOTE: Only valid for AC drive types with
Liquid Cooling option.
- Check liquid cooling
- Check the equipment and wiring that initiates the
external input
- Check the programming of the digital inputs DigIn
1-8
OPTION If an Option specific trip occurs Check the description of the specific option
Desat
Failure in output stage,
- desaturation of IGBTs
- Hard short circuit between phases or
phase to earth
- Earth fault
- For size B - D also the Brake IGBT
- Check on bad motor cable connections
- Check on bad earth cable connections
- Check on water and moisture in the
motor housing and cable connections
- Check that the rating plate data of the motor is
correctly entered.
- Check the brake resistor, brake IGBT and wiring.
- For size H and up, check the cables from the
PEBBs to the motor, that all are in correct order in
parallel connection
002 -105
Desat U+ *
090 & Up
Desat U- *
Desat V+ *
Desat V- *
Desat W+ *
Desat W- *
Desat BCC *
DC link error
DC link voltage ripple exceeds maximum
level
- Make sure all three phases are properly con-
nected and that the terminal screws are tight-
ened.
- Check that the mains supply voltage is within the
limits of the AC drive.
- Try to use other mains supply lines if dip is caused
by other machinery.
Power Fault
One of the PF (Power Fault) trips below has
occurred, but could not be determined.
- Check the PF errors and try to determine the
cause. The trip history can be helpful.
PF Fan Err * Error in fan module
- Check for clogged air inlet filters in panel door
and blocking material in fan module.
090 & Up
PF HCB Err* Error in controlled rectifier module (HCB) - Check mains supply voltage 060 & Up
PF Curr Err
Error in current balancing:
- between different modules.
- between two phases within one module.
- Check motor.
- Check fuses and line connections
- Check the individual motor current leads with an
clamp on amp meter.
430 & Up
PF Overvolt
Error in voltage balancing, overvoltage
detected in one of the power modules
(PEBB)
- Check motor.
- Check fuses and line connections.
430 & Up
PF Comm Err * Internal communication error Contact service
PF Int Temp * Internal temperature too high Check internal fans
PF Temp Err * Malfunction in temperature sensor Contact service
PF DC Err * DC-link error and mains supply fault
- Check mains supply voltage
- Check fuses and line connections.
060 & Up
PF Sup Err * Mains supply fault
- Check mains supply voltage
- Check fuses and line connections.
PF PBuC*
Powerboard micro controller reset by
watchdog.
Table 45 Trip condition, their possible causes and remedial action
Trip condition Possible Cause Remedy Size**
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