Komatsu 80001 User Manual

40 Troubleshooting SEN04123-01
PC130-8
45
E-23 Air conditioner does not operate normally (including air
conditioner abnormality record) 1
Trouble (1) When air conditioner switch is operated, air conditioner control screen is not displayed.
Related
information
• Condition of air conditioner switch signal can be checked with monitoring function.
(Code: 04505 Monitor 3rd, 4th line switches, 04506 Monitor 5th line switch)
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
1 Defective machine monitor
Machine monitor may be defective. (Since trouble is in system,
troubleshooting cannot be carried out.)
Trouble (2) When air conditioner switch is operated, air conditioner does not operate at all.
Related
information
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
1 Defective fuse No. 11 If fuse is broken, circuit probably has ground fault. (See cause 4.)
2 Defective fuse in unit
If fuse in unit is broken, circuit in unit probably has ground fault.
(See cause 4.)
3
Disconnection in wiring har-
ness (Disconnection in wiring
or defective contact in con-
nector)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between F01-11 – fuse in
unit – AC
W (wiring side) (6)
Resis-
tance
Max. 1 z
Wiring harness between AC
W (wiring side)
(16) – chassis ground (T07)
Resis-
tance
Max. 1 z
4
Ground fault in wiring har-
ness (Short circuit with GND
circuit)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between F01-11 – fuse in
unit – AC
W (wiring side) (6), – circuit branch
end and chassis ground
Resis-
tance
Min. 1 Mz
5
Defective air conditioner con-
troller
a Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
AC
W (wiring side) Voltage
Between (6) – (16) 20 – 30 V
If above voltage is normal, air conditioner controller may be defec-
tive.
6 Defective machine monitor
If causes 1 – 5 are not detected, machine monitor may be defec-
tive. (Since trouble is in system, troubleshooting cannot be carried
out.)

Komatsu 80001 Specifications

General

Brand	Komatsu
Model	80001
Category	Excavators
Language	English