2-31
2-31
501135
501135
CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
3.1
3.11
1 Tra
Tracti
ction Mo
on Motor Cu
tor Curre
rrent Se
nt Senso
nsor L.H
r L.H., Fa
., Fault (2
ult (24)
4)
Error code: 24
Error code: 24
Situation
Situation
Display: "24". All
Display: "24". All truck operations inhibited. Line contactor HOLD and ST contactor HOLD.
truck operations inhibited. Line contactor HOLD and ST contactor HOLD.
Traction moto
Traction motor and pump mo
r and pump motor operation
tor operation inhibited. If this fault o
inhibited. If this fault occurs before S
ccurs before ST contactor CLO
T contactor CLOSE, all
SE, all
operations inhibited except mast lowering operation.
operations inhibited except mast lowering operation.
Possible
Possible
cause
cause
Faulty traction inverter. (U, V current sensor in traction inverter)
Faulty traction inverter. (U, V current sensor in traction inverter)
Faulty DSP card of traction inverter.
Faulty DSP card of traction inverter.
Faulty contact or wire breakage of DSP flat
Faulty contact or wire breakage of DSP flat cable in traction inverter.
cable in traction inverter.
Trigger of
Trigger of
the error
the error
code
code
When turning on power, current sensor value is out of -120 A to 120 A .
When turning on power, current sensor value is out of -120 A to 120 A .
Checks
Checks
(2) Follow the inverter testing procedure
(2) Follow the inverter testing procedure
Normal
Abnormal
Normal
Abnormal
(4) Replace traction inverter
(4) Replace traction inverter
(6) Secure DSP flat cable if loose
(6) Secure DSP flat cable if loose
Replace traction inverter if wire breaks
Replace traction inverter if wire breaks
(3) Remove DSP cover of traction inverter
(3) Remove DSP cover of traction inverter
Check DSP Flat cable for looseness or wire breakage
Check DSP Flat cable for looseness or wire breakage
Normal
Abnormal
Normal
Abnormal
(5) Replace DSP card of traction inverter
(5) Replace DSP card of traction inverter
All powe
All powe
r cables
r cables
conne
conne
ct and turning on powe
ct and turning on powe
r
r
If fault (24) remains
If fault (24) remains
(7) Perform inverter discharging work
(7) Perform inverter discharging work
(1) Disconnect battery plug, then perform inverter discharging work
(1) Disconnect battery plug, then perform inverter discharging work
(8) Replace the DSP card with t
(8) Replace the DSP card with t
he original
he original
card again
card again
, then
, then
replace the traction inverter
replace the traction inverter
Please keep the DSP card which is used for inspection
Please keep the DSP card which is used for inspection
at step (5) because the card is normal
at step (5) because the card is normal
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