TCM FB20-8 - Load-Handling System (Orbitrol) Troubleshooting (2;3)

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3. TROUBLESHOOTING GUIDE
(5)
407
35
: Pump motor thermosensor defective
AD input range abnormal
Automatically resets when the input returns to
normal.
① Check the pump motor thermosensor for looseness.
Connect securely.
② Check the voltage between CN2P-6 and CN2P-17
on the pump motor inverter unit.
Repair the pump motor or wiring.
③ Replace the pump motor inverter unit.
(6)
410
73
: Rotation sensor defective
The A or B phase pulse is missing.
The A and B phase pulses are missing.
Automatically resets when the input returns to
normal.
410
74
: Rotation sensor defective
Abnormal bearing (Stall signals detected
continuously)
Automatically resets when the input returns to
normal.
① Check the voltage between the pump motor inverter
unit (CN2P-5, -16, -29) and the speed sensor
Correct the wiring.
② Check the pump motor slit board.
Repair the motor slit board.
③ Check the rotation sensor.
Repair the rotation sensor.
④ Replace the pump motor inverter unit.
(7)
412
06
: Lift potentiometer defective
Automatically resets when the input returns to
normal.
① Check the lift potentiometer connector for looseness.
Connect securely.
② Check the harness between the pump motor inverter
unit (CN2P-8, -20, -32) and the lift potentiometer.
Correct the wiring.
③ Check the lift potentiometer.
Repair the lift potentiometer.
④ Replace the pump motor inverter unit.