TROUBLESHOOTING OF
PUMP CONTROLLER SYSTEM
(C MODE)
Points to remember when troubleshooting pump controller system .................
Action taken be controller when abnormality occurs and problems on machine ........
Judgement table for pump controller and hydraulic related parts ...................
Pump controller system circuit diagram
........................................
Troubleshooting flow charts for each failure mode
c- 1
c-2
c- 3
Abnormality in pump controller power source system (swing brake is not canceled, etc) . . . . . 20-171
c-4
c- 5
C-6
c- 7
C- 8
c- 9
C-l 0
C-l 1
C-l 2
[E2:32]
[E2:36]
[E2:33]
[E2:37]
[E2:03]
[E2:13]
[E2:02]
[E2:04]
[E2:05]
[E2:06]
[E2:12]
[E2:14]
[E2:15]
[E2:16]
[E2:17]
[E2:18]
[E2:22]
[E2:23]
[E2:24]
[E2:25]
C-l 3 [E2:26]
C-l 4 [E2:27]
C-l 5 [E2:28]
. .
. .
. .
. .
. .
. .
. . . 20-I 64
. . 20-I 65
. . 20-169
. . 20-I 70
Short circuit in front pump TVC solenoid system is displayed
Short circuit in rear pump TVC solenoid system is displayed
.........
Disconnection in front pump TVC solenoid system is displayed
Disconnection in rear pump TVC solenoid system is displayed
.......
Short circuit in swing brake solenoid system is displayed
............
Disconnection in swing brake solenoid system is displayed
..........
Short circuit in LS select solenoid system is displayed
Short circuit in pump merge-divider solenoid system is displayed
Short circuit in 2-stage relief solenoid system is displayed
Short circuit in travel speed solenoid system is displayed
............
Disconnection in LS select solenoid system is displayed
Disconnection in pump merge-divider solenoid system is displayed
Disconnection in 2-stage relief solenoid system is displayed
Disconnection in travel speed solenoid system is displayed
..........
Model selection input error is displayed
..........................
Network response overtime error is displayed
.....................
Short circuit in LS control EPC solenoid system is displayed
..........
Disconnection in LS control EPC soleniod system is displayed
........
Abnormality in front pump pressure sensor system is displayed
Abnormality in rear pump pressure sensor system is displayed
.......
Abnormality in pump pressure sensor power source system is displayed
Abnormality in engine speed sensor system is displayed
............
Abnormality in auto-deceleration output system is displayed
.........
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. .
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. .
. .
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. . . . . 20-I 80
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. .
.
. .
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20-I 72
. . . 20-I 74
. . .
20-I 76
. . . 20-I 78
. . . 20-I 82
. . . 20-I 84
. . . 20-I 85
. . 20-I 87
. . 20-I 88
. 20-I 90
. . . 20-I 92
. . 20-I 93
. . . 20-I 94
20-I 63
a
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