Komatsu 80001 Shop Manual page 9

SEN03765-03
Failure code [DXE4KA] Service current EPC discon ..................................................................
Failure code [DXE4KB] Service current EPC short.....................................................................
Failure code [DY20KA] Wiper working abnormality .................................................................... 10
Failure code [DY20MA] Wiper parking abnormality .................................................................... 12
Failure code [DY2CKA] Washer drive discon.............................................................................. 14
Failure code [DY2CKB] Washer drive short ................................................................................ 16
Failure code [DY2DKB] Wiper drive (for) short ........................................................................... 18
Failure code [DY2EKB] Wiper drive (rev) short........................................................................... 20
Troubleshooting of electrical system (E-mode)
Before carrying out troubleshooting of electrical system.............................................................
Information in troubleshooting table ............................................................................................
E-1 When starting switch turned ON, machine monitor displays nothing....................................
E-2 When starting switch turned ON (before starting engine), basic check item lights up ..........
E-3 Engine does not start (Engine does not turn) ....................................................................... 11
E-4 Preheater does not operate .................................................................................................. 14
E-5 Automatic warm-up system does not operate (in cold season) ............................................ 16
E-6 All work equipment, swing, and travel mechanism do not move or cannot be locked.......... 18
E-7 Precaution lights up while engine is running......................................................................... 20
E-8 Emergency stop item lights up while engine is running ........................................................ 25
E-9 Engine coolant temperature gauge does not indicate normally............................................ 26
E-10 Hydraulic oil temperature gauge does not indicate normally .............................................. 27
E-11 Fuel level gauge does not indicate normally ....................................................................... 29
E-12 Contents of display by machine monitor are different from applicable machine................. 31
E-13 Machine monitor does not display some items................................................................... 31
E-14 Function switch does not work............................................................................................ 31
E-15 Auto-decelerator does not operate normally....................................................................... 32
E-16 Working mode does not change ......................................................................................... 33
E-17 Travel speed does not change............................................................................................ 34
E-18 Alarm buzzer cannot be stopped ........................................................................................ 35
E-19 Windshield wiper and window washer do not operate........................................................ 36
E-20 Power maximizing function does not operate normally ...................................................... 40
E-21 Swing holding brake does not operate normally................................................................. 42
E-22 Travel alarm does not sound or does not stop sounding .................................................... 44
E-23 Air conditioner does not operate normally (including air conditioner abnormality record) .. 45
E-24 While starting switch is in OFF position, service meter is not displayed............................. 57
E-25 Machine monitor cannot be set in service mode ................................................................ 57
E-26 Monitoring function does not display lever control signal normally..................................... 58
E-27 KOMTRAX system does not operate normally ................................................................... 74
Troubleshooting of hydraulic and mechanical system (H-mode)
Information contained in troubleshooting table............................................................................
System chart for hydraulic and mechanical systems ..................................................................
H-1 Speed or power of all work equipment, swing, and travel are low........................................
H-2 Engine speed sharply drops or engine stalls ........................................................................
H-3 No work equipment, travel and swing move.........................................................................
H-4 Abnormal noise is heard from around hydraulic pump .........................................................
H-5 Fine control mode does not function ....................................................................................
H-6 Speed or power of boom is low ............................................................................................ 10
H-7 Speed or power of arm is low ............................................................................................... 11
H-8 Speed or power of bucket is low........................................................................................... 12
H-9 Work equipment does not move in its single operation ........................................................ 13
H-10 Hydraulic drift of work equipment is large........................................................................... 14
H-11 Time lag of work equipment is large ................................................................................... 15
H-12 Power maximizing function does not operate normally ...................................................... 15
H-13 Work equipment loaded more is slower during compound operation................................. 16
H-14 Boom RAISE speed is low in compound operation of swing + boom RAISE ..................... 16
H-15 Travel speed lowers largely during compound operation of work equipment/swing + travel .. 17
H-16 Machine deviates during travel........................................................................................... 18
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00 Index and foreword
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SEN04123-00
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SEN04124-00
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PC130-8