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2-38
2-38
3.14 4 Pu
3.1
Pump M
mp Moto
Error code: 34
Error code: 34
Display: "34". All
Display: "34". All truck operations inhibited. Line contactor HOLD and ST contactor HOLD.
Situation
Situation
Traction motor and pump mot
Traction motor
operations inhibited except mast lowering operation.
operations inhibited except mast lowering operation.
Possible
Possible
Faulty pump inverter. (U, V current sensor in pump inverter)
Faulty pump inverter. (U, V current sensor in pump inverter)
Faulty DSP card of pump i
Faulty DSP card of pump inverter.
cause
cause
Faulty contact or wire breakage of DSP flat cable in pump inverter.
Faulty contact or wire breakage of DSP flat
Trigger of
Trigger of
the error
the error
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 .
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 pump inverter
(3) Remove DSP cover of pump inverter
Check DSP Flat cable for looseness or wire breakage
Check DSP Flat cable for looseness or wire breakage
Normal
Normal
(5) Replace DSP card of pump inverter
(5) Replace DSP card of pump inverter
All
All powe
power cables
r cables
(7) Perform inverter discharging work
(7) Perform inverter discharging work
(8) Replace the DSP card with
(8) Replace the DSP card with
replace the pump inverter
replace the pump 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
otor Cu
r Curre
rrent S
nt Sens
ensor F
or Faul
ault (34
truck operations inhibited. Line contactor HOLD and ST contactor HOLD.
and pump motor operation
or operation inhibited. If this fault
nverter.
Normal
Normal
Abnormal
Abnormal
conne
connect and turning on powe
ct and turning on
power
If fault (34) remains
If fault (34) remains
the origi
the
original card again
nal card
again, then
CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
t (34) )
inhibited. If this fault occurs before
cable in pump inverter.
(4) Replace pump inverter
(4) Replace pump inverter
(6) Secure DSP flat cable if loose
(6) Secure DSP flat cable if loose
r
Replace pump inverter if wire breaks
Replace pump inverter if wire breaks
, then
occurs before ST contactor CL
ST contactor CLOSE, all
OSE, all
Abnormal
Abnormal
501136
501136
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