Komatsu Galeo PC800-8 User Manual

58 PC800, 850-8
SEN00792-02 40 Troubleshooting
Failure code [DY20KA] Wiper Working Abnormality
Action code Failure code
Trouble
Wiper Working Abnormality
(Machine monitor system)
— DY20KA
Contents of
trouble
• When windshield wiper works, W signal of working ends is not input.
Action of
controller
• Turns working output to wiper motor OFF.
Problem that
appears on
machine
• Windshield wiper motor does not operate.
Related
information
• Input of W signal in wiper working area (ON/OFF) can be checked with monitoring function.
(Code 04502 Monitor Input 3)
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
1
Defective wiper motor
(Internal disconnection)
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
M05 (female) Wiper blade Resistance
Between (6) – (5)
Upper operating limit Max. 1 z
Other than upper oper-
ating limit
Min. 1 Mz
2
Disconnection in wiring har-
ness
(Disconnection in wiring or
defective contact in connec-
tor)
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
Wiring harness between CM01 (female) (5) –
M05 (male) (6)
Resistance Max. 1 z
Wiring harness between M05 (male) (5) – chas-
sis ground
Resistance Max. 1 z
3 Defective machine monitor
aPrepare with starting switch OFF, then turn starting switch ON and
carry out troubleshooting.
CM01 Wiper blade Voltage
Between (5) –
chassis ground
Upper operating limit Max. 1 V
Other than upper oper-
ating limit
20 – 30 V

Komatsu Galeo PC800-8 Specifications

General

Brand	Komatsu
Model	Galeo PC800-8
Category	Excavators
Language	English