MX-C250 TROUBLESHOOTING 7 – 14
U9-00 Communication trouble between the
controller and OPU
U9-81 OPU communication trouble (parity)
U9-82 OPU communication trouble (overrun)
U9-84 OPU communication trouble (flaming)
U9-88 OPU communication trouble (time-
out)
U9-99 OPU language error
UC-02 IPD ASIC (CPT) error
Cause OPU connector connection trouble
Harness trouble between OPU PWB and MCU
PWB
Break connector pin of OPU PWB
Lift unit trouble.
Connection trouble of the connector and the
harness.
PCU PWB trouble
Check & Remedy Check connector connection and harness of OPU
PWB and MCU PWB
Replace OPU PWB or MCU PWB
Check ground point
Power off/on
Cause OPU connector connection trouble
Harness trouble between OPU PWB and MCU
PWB
Break connector pin of OPU PWB
Lift unit trouble.
Connection trouble of the connector and the
harness.
PCU PWB trouble
Check & Remedy Check connector connection and harness of OPU
PWB and MCU PWB
Replace OPU PWB or MCU PWB
Check ground point
Power off/on
Cause Connection error between OPU PWB and MCU
PWB / data corruption
Check & Remedy Check connector connection and harness of OPU
PWB and MCU PWB
Replace OPU PWB or MCU PWB
Check ground point
Power off/on
Cause Connection error between OPU PWB and MCU
PWB / data corruption
Check & Remedy Check connector connection and harness of OPU
PWB and MCU PWB
Replace OPU PWB or MCU PWB
Check ground point
Power off/on
Cause Command size error from MCU to OPU
Check & Remedy Check connector connection and harness of OPU
PWB and MCU PWB
Replace OPU PWB or MCU PWB
Check ground point
Power off/on
Cause Command size error from MCU to OPU
Check & Remedy Check connector connection and harness of OPU
PWB and MCU PWB
Replace OPU PWB or MCU PWB
Check ground point
Power off/on
Cause IPD ASIC (CPT) operation error
MFPC PWB trouble.
Check & Remedy Replace the MFPC PWB.
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