Komatsu PC88MR-10 Shop Manual page 1365

Failure code
879EMC
879FMC
879GKX
DAZ9KQ
DAZQKR
*: Troubleshooting cannot be performed while the controller is mounted on the machine since the connector
cannot be checked.
**: Troubleshooting is not performed by the air conditioner unit but by the machine monitor.
a The air conditioner inner sensor means the inside (air) temperature sensor.
a The air conditioner outer sensor means the outside (air) temperature sensor.
a The ventilating sensor means the evaporator temperature sensor (frost sensor).
a The ventilation damper means the vent (mode) changeover damper (door).
a The air mix damper means the temperature adjustment (air mix) damper (door).
PC88MR-10
Failure (Displayed on screen)
Ventilation Damper Abnormality
Air Mix Damper Abnormality
Refrigerant Abnormality
Air Conditioner Model Selection
Abnormality
CAN2 Disconnection (Air
Conditioner ECU)
80 Appendix
Testing with self-diagnosis function
Remarks
*
*
See Chapter 40, "Troubleshooting
by failure code" **
80-41