Mitsubishi FB13PNT, Quick Start Manual

Page: 123 / 292

2-36 2-36
501136 501136
CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
3.1 3.13 3 Tra Tracti ction M on Moto otor L. r L.H., H., Sta Stall T ll Time imer (26 r (26))
Error code: 26 Error code: 26
Situation Situation
Display: “26”. Display: “26”. Traction motor and pump motor oper Traction motor and pump motor operation inhibited. Line contactor HOLD and ST contactor ation inhibited. Line contactor HOLD and ST contactor
HOLD HOLD
Possible Possible
cause cause
Stall current flowed more than 7s right traction motor, faulty Stall current flowed more than 7s right traction motor, faulty right traction inverter current sensor, shorted right traction inverter current sensor, shorted
harness wiring, faulty right traction inverter DSP card, faulty logic harness wiring, faulty right traction inverter DSP card, faulty logic unit. unit.
Trigger of Trigger of
the error the error
code
code
7s is measured while stalling. 7s is measured while stalling.
Checks Checks
(1) Turn off power, then turn on power again (1) Turn off power, then turn on power again
Confirm error code display Confirm error code display
N N o o e e r r r r o o r r , , p p r r o o b b l l e e m m r r e e o o c c c c u u r r s s E E r r r r o o r r c c o o d d e e " " 24 24 " "
(3) See troubleshooting for code "24" (3) See troubleshooting for code "24" (2) Check to see if truck is operated with heavy cargo (2) Check to see if truck is operated with heavy cargo
load or on steps when motor stalls load or on steps when motor stalls
Normal Normal steeps steeps Heavy Heavy load load
(5) Operate under normal (5) Operate under normal cond cond ition ition
(9) Disc (9) Disc onnec onnec t connector E-02 t connector E-02 of logic unit of logic unit
Check continuity between E-02-5 and E-06-3(3) Check continuity between E-02-5 and E-06-3(3)
Check continuity between E-02-6 and E-06-4(4) Check continuity between E-02-6 and E-06-4(4)
Continuity Continuity Abnormal Abnormal and and no no continuity continuity
(4) Disconnect battery plug, then perform inverter (4) Disconnect battery plug, then perform inverter
discharging work discharging work
(6) Dis (6) Dis conne conne ct conne ct conne ctor E-06 ctor E-06 of left of left traction inve traction inve rter rter
and remove DSP cover, then check DSP flat cable for and remove DSP cover, then check DSP flat cable for
looseness or wire breakage looseness or wire breakage
Normal Abnormal Normal Abnormal
(7) Disc (7) Disc onnec onnec t connector E-01 t connector E-01 of logic unit of logic unit
Check continuity between E-01-5 and E-06-16(9) Check continuity between E-01-5 and E-06-16(9)
Check continuity between E-01-6 and E-06-20(12) Check continuity between E-01-6 and E-06-20(12)
Continuity Continuity No No continuity continuity
(8) Secure harness if loose (8) Secure harness if loose
Replac Replac e lefttraction inverter if e lefttraction inverter if wire breaks wire breaks
(14) Replac (14) Replac e DSP c e DSP c ard of left ard of left traction inverter traction inverter
(11) Repair or replace harness (11) Repair or replace harness
(10) Connec (10) Connec t connector E-01 t connector E-01 to logic unit, then turn on to logic unit, then turn on
power again power again
(13) Disconnect battery plug, then perform inverter discharging work (13) Disconnect battery plug, then perform inverter discharging work
(15) Replace power supply card of logic unit (15) Replace power supply card of logic unit
(12) Measure voltage between E-06-16(9) and (12) Measure voltage between E-06-16(9) and
E-06-20(12) E-06-20(12)
Normal Abnormal Normal Abnormal
CAN CAN
Power supply Power supply
Con Con firm valu firm valu e is e is 12 ± 12 ± 1 V 1 V