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Appendix A2
A540-55-880 Issue D
Example:
PDT shows the following:
0108 0200
This translates to:
alarm 1 in bit 2 – PWM_TRIP
alarm 8 in bit 4 – OVERT
warning 2 in bit 6 - HIGHTM.
This means the motor overheated and switched the output off.
6 8 HIGHTC Controller temperature above upper limit / Controller
temperature sensor open circuit - check water supply
4 HIGHTS Inverter heat sink temperature above upper limit /
Inverter heat sink temperature sensor open circuit - check
water supply
2 HIGHTM Motor temperature above upper limit / Motor temperature
sensor open circuit - check water supply
1 MISSING_PHASE The loss of one of the three input phases has been
detected - check mains supply to drive or blown fuses
7 8 UTCREG Upper controller temperature regulator active - current
limit reduced - check cooling
4 UTSREG Upper heat sink temperature regulator active - current
limit reduced - check cooling
2 UTMREG Upper motor temperature regulator active - check motor
cooling
1 LVREG Lower voltage regulator active - check mains voltage
8 8 LOWVCC Internal power supply fault - contact Edwards
4 LOWTC Low controller temperature - contact Edwards
2 LOWTS Low heatsink temperature - contact Edwards
1 LOWTM Low motor temperature - contact Edwards
Table A17 - Inverter warnings codes (continued)
Inverter warnings
BIT
Fault Code
Combination
Name Description