Komatsu PC200-8M0, Shop Manual, Page: 1190 / 1254

100 Air conditioner
Testing with self-diagnosis function
80-100
32
PC200, 200LC, 220, 220LC-8M0
SEN06151-00
2. On the service menu screen, press [F3] (
R
)
twice, and then select "03 Abnormality Record".
3. Press [F6] ( ) to confirm.
4. On the Abnormality Record screen, press [F3]
(
R
) once, and then select "02 Electrical
Systems".
5. Press [F6] ( ) to confirm.
*: Troubleshooting cannot be performed while the
controller is mounted on the machine since the con-
nector cannot be checked.
**: Troubleshooting is not performed by the air con-
ditioner unit but by the machine monitor.
a
The air conditioner inner sensor means the in-
side (air) temperature sensor.
a
The air conditioner outer sensor means the out-
side (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 ad-
justment (air mix) damper (door).
a
For details, see the failure code list related to air
conditioner
Failure
code
Failure (Displayed on
screen)
Remarks
879AKA
A/C Inner Sensor Open
Circuit
*
879AKB
A/C Inner Sensor Short
Circuit
879BKA
A/C Outer Sensor Open
Circuit
879BKB
A/C Outer Sensor Short
Circuit
879CKA
Ventilating Sensor Open
Circuit
*
879CKB
Ventilating Sensor Short
Circuit
879DKZ
Sunlight Sensor Open or
Short Circuit
879EMC
Ventilation Dumper
Abnormality
*
879FMC
Air Mix Dumper Abnor-
mality
*
879GKX Refrigerant Abnormality
DAZ9KQ
A/C Model Selection
Abnormality See Chapter
40, "Trouble-
shooting by fail-
ure code"
**
DAZQKR
CAN2 Discon (Aircon
ECU)