Failure Code [Da22Kk] Pump Solenoid Power Low Error - Komatsu PC130-8 Shop Manual

SEN04120-03

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
40
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-
ing without turning starting switch ON.
Wiring harness between CP02 (female)
(116), (118), (121) – F01-2
Wiring harness between F01-1A – F04
(male) (2)
Wiring harness between F04 (male) (1) –
R03A
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between CP02 (female)
(116), (118), (121) – F01-2 and chassis
ground
Wiring harness between F01-1A – F04
(male) (2), – circuit branch end and chassis
ground
Wiring harness between F04 (male) (1) –
R03A and chassis ground
a Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
CP01 (female), CP02 (female)
Between CP02 (116), (118),
(121) – CP01 (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
PC130-8