—
—
Q Q Q Q Q Q Q Q Q Q Q Q Q Q — — — Q — — — Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q —
— —
— —
—
PC78US-6 —
— —
q q
—
E40
q q
q q
q q
q q q q
q q
q q E41
401 402 404 405 407 408 421 422 423 424 425 426 431 435 1023
—
1021 1026 1060
CC- C- CC- C- C- C- C- C- C- Nor 14 C-15 16 17 18 C-19 20 21 22 23 24 25 26 mal — — — — — — — — — — — —
: Items that can only be checked by monitoring
—
—
—
—
—
—
—
—
— — — — — — — — F-3 F-4 F-2 F-1 F-7 F-5 F-6 — — — — — F-8 —
—
—
—
—
—
—
—
—
Offset LEFT EPC current output
Arm IN EPC current output
Boom RAISE EPC current output
TVC-EPC current output
Offset boom sensor voltage input
Arm angle sensor voltage input
Boom angle sensor voltage input
Engine speed input
Emergency work equipment operation switch input (3)
ATT selection
Model selection and UU/US selection cod
2nd travel speed selection (4)
Self-diagnosis Display By Controller
Swing holding brake (1)
Hydraulic Switch
PPC main pressure (2)
Travel speed selector pedal switch input (4)
Deceleration switch signal input (1)
Air compressor signal input (3)
Swing (4)
Travel (3)
Arm LOWER (5)
Boom RAISE (6)
When emergency stop is applied (Interference prevention)
Disconnection in PPC main pressure solenoid system
Disconnection in offset boom LEFT EPC solenoid system
Short circuit in offset boom LEFT EPC solenoid system
Disconnection in arm IN EPC solenoid system
Short circuit in arm IN EPC solenoid system
Disconnection in boom RAISE EPC solenoid system
Short circuit in boom RAISE EPC solenoid system
Disconnection on power supply side of offset boom angle sensor/Short circuit or disconnection of signal line
Disconnection on power supply side of arm angle sensor/Short circuit or disconnection of signal line Disconnection on GND side of offset boom angle sensor
Disconnection on GND side of arm angle sensor
Disconnection on power supply side of boom angle sensor/Short circuit or disconnection of signal line
Disconnection on GND side of boom angle sensor
TROUBLESHOOTING JUDGEMENT TABLE FOR CONTROLLER (PUMP CONTROL SYSTEM) AND HYDRAULIC EQUIPMENT
State of Solenoid
Items Checked By Monitoring
q q q q q q Diagnosis code displayed when trouble is not detected by monitoring
Monitoring Code
— — — — — — — — 1020 1026 1010 1030 1032 1031 1050 1051 1052 1053
q q C-14 – C-20
C-26
H-1
q q H-3
H-2
H-7
q q H-10
H-8
H-12
H-11
q q H-14
C-39,H-28
H-26
C-38,H-34 H-33
H-39
q
C-27 —
q
—
q
C-28
—
C-29
C-30
Q
C-31
C-32
q q
C-33
C-34
C-35
q
C-36
C-37
q : Items corresponding to service codes
20-357
(12)