Komatsu Galeo PC138US-8 Shop Manual page 656

HYDRAULIC EXCAVATOR
PC138US-8
PC138USLC-8
Machine model
PC138US-8
PC138USLC-8
40 Troubleshooting
Troubleshooting of electrical system
(E-mode)
Before carrying out troubleshooting of electrical system ................................................................................ 3
Information in troubleshooting table................................................................................................................ 5
E-1 When starting switch turned ON, machine monitor displays nothing ....................................................... 6
E-2 When starting switch turned ON (before starting engine), basic check item lights up.............................. 8
E-3 Engine does not start (Engine does not turn) ........................................................................................... 9
E-4 Preheater does not operate.................................................................................................................... 12
E-5 Automatic warm-up system does not operate (in cold season).............................................................. 14
E-6 All work equipment, swing, and travel mechanism do not move or cannot be locked ........................... 16
E-7 Precaution lights up while engine is running .......................................................................................... 18
E-8 Emergency stop item lights up while engine is running.......................................................................... 21
E-9 Engine coolant temperature gauge does not indicate normally ............................................................. 22
E-10 Hydraulic oil temperature gauge does not indicate normally................................................................ 23
E-11 Fuel level gauge does not indicate normally ........................................................................................ 25
E-12 Contents of display by machine monitor are different from applicable machine .................................. 27
PC138US, USLC-8
1SHOP MANUAL
Serial number
20001 and up
20001 and up
SEN02467-00
1
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