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.