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