Komatsu PC58UU-3 User Manual

20-612 PC58UU-3
TROUBLESHOOTING
M-11 Alarm buzzer operates abnormally
a) Buzzer does not sound
b) Buzzer keeps sounding
M-11 a) and b) Related electrical circuit diagram
Cause Remedy
• Connect F27 (female) (15) to
(3).
• Turn starting switch ON.
1
When F27 (female) (15) is connected to
(3), does buzzer sound?
NO
YES
Defective monitor panel Replace
2
Broken fuse or disconnec-
tion or defective contact in
wiring harness between fuse
(2) – F14 (female) (2)
Disconnection or defective
contact in wiring harness
between F14 (female) (1) –
F27 (female) (15) or defec-
tive buzzer
• 10 – 15 V
• Turn starting switch ON.
Is voltage between F14 (female) (2)
and chassis ground normal?
NO
Repair or
replace
YES
Repair or
replace
Cause Remedy
• Turn the starting switch ON.
• Disconnect F27.
1
Contact with chassis ground
in wiring harness between
F27 (female) (15) – F14
(female) (1)
Defective monitor panel
When F27 is disconnected, does
buzzer stop sounding?
NO
Repair or
replace
YES
Replace
M-11
(6)

Komatsu PC58UU-3 Specifications

General

Brand	Komatsu
Model	PC58UU-3
Category	Construction Equipment
Language	English