Mitsubishi FB13PNT, Quick Start Manual

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2-79 2-79
501164 501164
CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
3.3 3.34 4 Att Attach achmen ment 2 Le t 2 Lever ver, Fa , Fault ulty Se y Setti tting (H ng (H4) 4)
Error code: H4 Error code: H4
Situation Situation
Display: "H4" flashes. Display: "H4" flashes. Pump motor and power steering operations inhibited. Pump contactor OPEN if this fault Pump motor and power steering operations inhibited. Pump contactor OPEN if this fault
occurs when turning on power. Pump contactor CLOSE if this fault occurs when turning on power. Pump contactor CLOSE if this fault occurs during pump operation and then occurs during pump operation and then
OPEN if truck stops. OPEN if truck stops.
Possible Possible
cause
cause
Key switch turned on while operating attachment 2 lever, faulty Key switch turned on while operating attachment 2 lever, faulty attachment 2 control lever or attachment 2 attachment 2 control lever or attachment 2
switch, faulty main harness, faulty logic unit, faulty input unit. switch, faulty main harness, faulty logic unit, faulty input unit.
Trigger of Trigger of
the error the error
code
code
Detects attachment 2 control lever signal of CAN when turning on Detects attachment 2 control lever signal of CAN when turning on power (FC specification). Detects power (FC specification). Detects
attachment 2 microswitch when turning on attachment 2 microswitch when turning on power (MC specification). power (MC specification).
Checks Checks
(1) (1)
If If this this fault fault occurred occurred during during If If this this fault fault occurred occurred when when
pump pump motor motor operation operation turning turning on on power power
(2) Sit on seat, then stop pump motor operation (2) Sit on seat, then stop pump motor operation
If If fault fault remains remains Normal Normal
(4) Turn off power. Sit on seat, then turn on power again (4) Turn off power. Sit on seat, then turn on power again
without without attachment attachment 2 2 opera opera tion tion
I I f f f f a a u u l l t t r r e e m m a a i i n n s s E E r r r r o o r c r c o o d d e e " " 54 54 " " or or " " 67 67 " " or or " " (L) (L) " "
(8) Change attachment 2 control lever to other normal (8) Change attachment 2 control lever to other normal
control lever control lever
Not Not changed changed Error Error changed changed
(12) Replace attachment 2 switch (12) Replace attachment 2 switch
(7) Disconnect connector E-36 of microswitch (7) Disconnect connector E-36 of microswitch
Sit on seat, then turn on power again Sit on seat, then turn on power again
If If fault fault remains remains Normal Normal
(11) Disconnect battery plug, then perform inverter (11) Disconnect battery plug, then perform inverter
discharging work discharging work
(9) Repair or replace (9) Repair or replace
FC-IN harness FC-IN harness
(10) Replace attachment (10) Replace attachment
2 2 contro contro l lev l lev er er
(5) Turn off power (5) Turn off power
(6) Refer to error code (6) Refer to error code
"54", "67" or "(L)" "54", "67" or "(L)"
(13) Check continuity between E-04-48 and E-36-5(121) (13) Check continuity between E-04-48 and E-36-5(121)
Chec Chec k shor k shor t circuit between E- t circuit between E- 36-5 36-5 and and E-36-6 E-36-6
Continui Continui ty, ty, Not Not shorted shorted No No continui continui ty, ty, Shorted Shorted
MC MC
specification specification
FC specification FC specification
(3) Fail-sa (3) Fail-sa fe fe function function