Komatsu Galeo PC138US-8 Shop Manual page 702

40 Troubleshooting
Trouble (13) Air conditioner abnormality record: Refrigerant "Abnormality"
• If "CAN disconnection" is displayed as communication condition, communication cannot be carried
Related out normally. Accordingly, this condition is not displayed.
information • Method of reproducing abnormality record: Turn starting switch ON + Turn air conditioner (A/C)
switch ON.
Insufficient refrigerant (gas)
1
(when system is normal)
Defective high and low pres-
2 sure switches (Internal dis-
connection)
Possible causes
and standard
value in normal
Disconnection in wiring har-
state
ness (Disconnection in wiring
3
or defective contact in con-
nector)
Defective air conditioner con-
4
troller
PC138US, USLC-8
Cause Standard value in normal state/Remarks on troubleshooting
Refrigerant (gas) may be insufficient. Check it directly.
a Prepare with starting switch OFF, then carry out troubleshoot-
a Prepare with starting switch OFF, then carry out troubleshoot-
Wiring harness between AC
(4) – P17 (female) (1)
Wiring harness between P17 (female) (2) –
chassis ground (T08)
If causes 1 – 3 are not detected, air conditioner controller may be
defective. (Since trouble is in system, troubleshooting cannot be
carried out.)
ing without turning starting switch ON.
P17 (male)
Between (1) – (2)
ing without turning starting switch ON.
W
SEN02467-00
Resistance
Max. 1 z
(wiring side) Resis-
tance
Resis-
tance
Max. 1 z
Max. 1 z
49