Failure Code List Related To Air Conditioner - Komatsu PC88MR-10 Shop Manual

Failure code list related to air conditioner

Failure
Failure (Displayed on screen)
code
A/C Recirc Air Temp Sens
879AKA
Open Circuit
A/C Recirc Air Temp Sens
879AKB
Short
A/C Fresh Air Temp Sens
879BKA
Open Circuit
A/C Fresh Air Temp Sens
879BKB
Short Circuit
Ventilating Sensor Open
879CKA
Circuit
Ventilating Sensor Short
879CKB
Circuit
Sunlight Sensor Open or
879DKZ
Short Circuit
Ventilation Damper
879EMC
Malfunction
879FMC Air Mix Damper Malfunction
Refrigerant Press Input Sig
879GKX
Out of Range
Air Conditioner Model
DAZ9KQ
Selection Abnormality
CAN2 Disconnection (Air
DAZQKR
Conditioner ECU)
**: 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).
a Troubleshooting for the troubles which do not display failure codes
Troubleshooting for power supply system (Air conditioner does not operate)
Troubleshooting for compressor and refrigerant system (Air is not cooled)
Troubleshooting for blower motor system (No air comes out or air flow is abnormal)
Troubleshooting for FRESH/RECIRC air changeover
PC88MR-10
(PC88MR-K500-441-K-00-A)
Applicable
Action
compo-
level
nent
MON
MON
MON
MON
MON
MON
MON
MON L01
MON L01
MON L01
MON
MON L01

Failure code list related to air conditioner

History
Remarks
category
Electrical Troubleshooting cannot be
system performed while the controller
is mounted on the machine
Electrical
since the connector cannot
system
be checked.
Electrical
system
Electrical
system
Electrical Troubleshooting cannot be
system performed while the controller
is mounted on the machine
Electrical
since the connector cannot
system
be checked.
Electrical
system
Electrical Troubleshooting cannot be
system performed while the controller
is mounted on the machine
Electrical
since the connector cannot
system
be checked.
Electrical
system
Electrical
See Chapter 40,
system
"Troubleshooting by failure
Electrical
code" **
system
80 Appendix
80-53