TCM FB20-8 - LOAD-HANDLING SYSTEM TROUBLESHOOTING (ORBITROL); Load-Handling System (Orbitrol) Troubleshooting (1;3)

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3. TROUBLESHOOTING GUIDE
2. Load handling system (including trucks with an Orbitrol steering system)
(1)
N点滅
01
: Load-handling system neutral interlock
Resets when the load-handling levers are put in
neutral.
① Put the load-handling levers in neutral.
② Check the lift potentiometer voltage.
Repair the lift potentiometer or wiring.
③ Check the voltage at the CN1P-16, -17, and -18
terminals on the pump motor inverter unit
Repair the switch or wiring.
④ Replace the pump motor inverter unit.
(2)
402
34
: Pump motor inverter unit temp. abnormal
Resets when the temperature drops to less than
109°C [228.2°F].
403
33
: Pump motor inverter unit temp. too high
Resets when the temperature drops to 90°C [194°F]
or below.
① Turn the key switch OFF and allow the controller to
cool down for 30 minutes.
② Check the drive and pump motor inverter units for
loose screws.
Retighten.
③ Replace the pump motor inverter unit.
(3)
404
31
: Pump motor inverter unit thermosensor 1
(TMD1) AD input range abnormal
Automatically resets when the input returns to
normal.
404
32
: Pump motor inverter unit thermosensor 2
(TMD2) AD input range abnormal
Automatically resets when the input returns to
normal.
① Replace the pump motor inverter unit.
(4)
405
37
: Pump motor temp. abnormal
Resets when the temperature drops to less than
155°C [311°F].
406
36
: Pump motor temp. too high
Resets when the temperature drops to 135°C
[275°F] or below.
① Turn the key switch OFF and allow the motor to cool
down for 30 minutes.
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.