Komatsu PC200-8M0, Shop Manual

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400 Troubleshooting of electrical system (E-mode)
E-17 Alarm buzzer cannot be canceled
40-400
36
PC200, 200LC, 220, 220LC-8M0
SEN06138-00
E-17 Alarm buzzer cannot be canceled
E-18 When starting switch is turned OFF, service meter is not displayed
E-19 Service mode cannot be selected
Failure
q
Alarm buzzer does not stop sounding.
Related information
q Signal of alarm buzzer cancel switch can be checked with monitoring function.
(Code: 04504 Monitor 1st, 2nd line switches)
Cause Procedure, measuring location, criteria and remarks
1 Defective machine monitor
Machine monitor may be defective. (Since this is an internal defect, trouble-
shooting cannot be performed.)
Failure
q
When starting switch is at OFF position, service meter is not displayed.
Related information
q
While starting switch is at OFF position, if following switches are operated, service meter is
displayed at top center of screen.
Operation of switches: [4] and [1] (Press simultaneously)
Cause Procedure, measuring location, criteria and remarks
1
Defective backup power supply
system
When starting switch is turned to ON position, if machine monitor displays
nothing, backup power supply system may be defective. In this case, perform
troubleshooting for "E-3 When starting switch is turned to ON position,
machine monitor displays nothing".
2 Defective machine monitor
If no failure is found by check on cause 1, machine monitor may be defective.
(Since this is an internal defect, troubleshooting cannot be performed.)
Failure
q
Machine monitor cannot be set in service mode
Related information
q
Following switch operation sets machine monitor in service mode.
Switch operation: [4] and [1]
o
[2]
o
[3] (While pressing [4], press [1], [2], and [3] in order)
Cause Procedure, measuring location, criteria and remarks
1 Defective machine monitor
Machine monitor may be defective. (Since this is an internal defect, trouble-
shooting cannot be performed.)