DRIVE FAULTS
94
ERROR/FAULT CODE PROBABLE CAUSE/ — CORRECTIVE ACTION
917 REVERSE ARMATURE POLARITY - (DSD power down is required.)
This fault will show up when doing the F998 PCU Diagnostics Test. It
indicates that the polarity of the Armature Voltage Feedback wires is
reversed or missing. Check connections on A1TB5-1 and A1TB5-2 of
the Armature Interface PCB, A2. F909 faults and/or very poor
drive/ride performance may occur if not corrected.
919 LINE VOLTAGE SETTING FAULT (DSD power down is required.)
This fault is declared if a number is entered for the Rated Line Voltage,
#9 that is outside the acceptable range of 150 to 525VAC. If 0 is
entered, the rated line voltage defaults to 230 or 460 VAC depending
on the line voltage sensed.
920 LOAD VOLTAGE SETTING FAULT (DSD power down is required.)
Declared if the Rated Armature Voltage, #7 value is outside the
acceptable range of 150 to 700 VDC.
921 BRIDGE RATING FAULT (DSD power down is required.)
The bridge type is determined by reading a sense resistor on the Cube
ID PCB plugged into the A2 Armature Interface PCB. The resistor
value identifies the ampere rating and current feedback scaling of the
physical hardware. This failure occurs if the computer cannot identify
the drive size. Possible causes:
J14 on Main Control PCB is not seated properly.
Missing or wrong Cube ID PCB.
Wrong PCU software in U13 & 14.
Faulty Armature Interface PCB – replace PCB.
Faulty Drive Control PCB – replace PCB.
923 LOAD CURRENT SETTING FAULT - (DSD power down is required.)
This fault is declared if a number is entered for Rated Armature
Current, #3 that is outside the acceptable range of 0.125 to 2.0 times
the bridge current rating as determined by the bridge sense resistor on
the Cube ID PCB, on the Armature Interface PCB.
924 FIELD CURRENT SETTING FAULT (DSD power down is required.)
This fault is declared if a number is entered for Rated Field Current
#50 that is outside the acceptable range of the Field Interface board,
A3 current rating as determined by the field sense resistor selected by
SW1 on the Field Interface PCB.
925 FIELD SENSE FAULT - (DSD power down is required.)
The field bridge rating is determined by reading a sense resistor on the
Field Interface board selected by SW1. This resistance identifies the
motor field current feedback scaling for the A/D converter. If the
resistance value is not recognized a Field Sense Fault is declared.
This indicates that there is a hardware fault on the Field Interface PCB,
Drive Control PCB, or within the interconnecting cables and hardware.
Check that J13 is seated properly and that the cable is not defective.
926 PCU WATCHDOG - (DSD power down is required.)
This fault is declared when the PCU is reset via its own software
watchdo
timer. It is an indication of a PCB hardware
roblem more
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