Yale MPB045VG Maintenance Manual page 42

Diagnostic Trouble Codes
CAUSE B - TRACTION MOTOR FAULT
PROCEDURE OR ACTION:
1. Measure continuity between the traction motor terminals U and V.
Is continuity present?
YES: Proceed to Step 2.
NO: Repair or replace faulty traction motor.
2. Measure continuity between the traction motor terminals U and W.
Is continuity present?
YES: Proceed to Step 3.
NO: Repair or replace faulty traction motor.
3. Measure continuity between the traction motor terminals W and V.
Is continuity present?
YES: Proceed to CAUSE C.
NO: Repair or replace faulty traction motor.
CAUSE C - FAULTY TRACTION CONTROLLER
PROCEDURE OR ACTION:
1. If no faults are found, replace controller. Make sure to indicate the DTC code(s) on the warranty claim to
include an accurate problem description leading to controller replacement.
END POSSIBLE CAUSES
DIAGRAMS
END FAULT
Check the Service Manual section in Yale Axcess Online for possible updates and check pertinent Bulletins
9030-20-18
Traction Motor
Confidential/Proprietary - Do Not Copy or Duplicate
ELECTRICAL SYSTEM