Failure Code [Da22Kk] Pump Solenoid Power Low Error - Komatsu Galeo PC138US-8 Shop Manual

SEN02464-01

Failure code [DA22KK] Pump solenoid power low error

User code Failure code
E0E DA22KK
Contents of
• Solenoid power supply voltage of controller is below 20 V.
trouble
• While this failure code is displayed, detection of failure codes (disconnection/short circuit) of all the
Action of
solenoid systems is stopped.
controller
• Even if cause of failure disappears, system does not reset itself until starting switch is turned OFF.
Problem that
appears on • Since no solenoid valve is driven normally, machine does not operate normally.
machine
Related
• Method of reproducing failure code: Turn starting switch ON.
information
1 Defective fuse F01
Disconnection in wiring har-
ness (Disconnection in wiring
2
or defective contact in con-
nector)
Possible causes
and standard
value in normal
state
Ground fault in wiring har-
3 ness (Short circuit with GND
circuit)
4 Defective pump controller
38
Lowering of solenoid power supply voltage
Trouble
(Pump controller system)
Cause Standard value in normal state/Remarks on troubleshooting
If fuse is broken, circuit probably has ground fault. (See Cause 3.)
a Prepare with starting switch OFF, then carry out troubleshoot-
Wiring harness between C02 (female) (116),
(118), (121) – F01-2
Wiring harness between F01-1A – F02
(male) (2)
Wiring harness between F02 (male) (1) –
RM
a Prepare with starting switch OFF, then carry out troubleshoot-
Wiring harness between C02 (female) (116),
(118), (121) – F01-2
Wiring harness between F01-1A – F02
(male) (2), – circuit branch end
Wiring harness between F02 (male) (1) –
RM
a Prepare with starting switch OFF, then turn starting switch ON
C01 (female), C02 (female)
Between C02 (116), (118),
ing without turning starting switch ON.
ing without turning starting switch ON.
and carry out troubleshooting.
(121) – C01 (2), (5)
40 Troubleshooting
1
Resis-
Max. 1 z
tance
Resis-
Max. 1 z
tance
Resis-
Max. 1 z
tance
Resis-
Min. 1 Mz
tance
Resis-
Min. 1 Mz
tance
Resis-
Min. 1 Mz
tance
Voltage
20 – 30 V
PC138US, USLC-8