Advertisement
CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
3.33 3 Att
3.3
Attach
Error code: H3
Error code: H3
Situation
Situation
Possible
Possible
cause
cause
Trigger of
Trigger of
the error
the error
code
code
Checks
Checks
(1)
(1)
(2) Sit on seat, then stop pump motor operation
(2) Sit on seat, then stop pump motor operation
If
If
fault
fault
(4) Turn off power. Sit on seat, then turn on power
(4) Turn off power. Sit on seat, then turn on power
again without
again without
If
If
fault
fault
(5) Turn off
(5) Turn off
MC
MC
specification
specification
(8) Disconnect connector E-36 of microswitch
(8) 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
(11) Disconnect battery plug, then perform inverter
(11) Disconnect battery plug, then perform inverter
discharging work
discharging work
(13) Check continuity between E-04-49 and E-36-4(83)
(13) Check continuity between E-04-49 and E-36-4(83)
Chec
Check shor
Continuity,
Continui
achmen
ment 1 Le
t 1 Lever
ver, Fa
, Fault
ulty Se
Display: "H3" flashes. Pump motor and power steering operations inhibited. Pump contactor OPEN if this fault
Display: "H3" flashes.
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 during pump operation and then
occurs when turning on power. Pump contactor CLOSE if this fault
OPEN if truck stops.
OPEN if truck stops.
Key switch turned on while operating attachment 1 lever, faulty attachment 1 control lever or attachment 1
Key switch turned on while operating attachment 1 lever, faulty
switch, faulty main harness, faulty logic unit, faulty input unit.
switch, faulty main harness, faulty logic unit, faulty input unit.
Detects attachment 1 control lever signal of CAN when turning on power (FC specification). Detects
Detects attachment 1 control lever signal of CAN when turning on
attachment 1 microswitch when turning on power (MC specification).
attachment 1 microswitch when turning on
If
If
this
this
fault
fault
occurred
occurred
during
during
pump
pump
motor
motor
operation
operation
remains
remains
Normal
Normal
(3) Fail-safe function
(3) Fail-safe function
attachment
attachment
1 operation
1 operation
remains
remains
Error
Error
code
code
"
"
54"
54
power
power
(6) "Refer to error code
(6) "Refer to error code
"54", "67" or "(L)"
"54", "67" or "(L)"
remains
remains
Normal
Normal
k
short circuit between
t circuit between
E-36-4
E-36-4
and
and
ty,
Not
Not
shorted
shorted
No
No
continui
continui
y Setti
tting (H
ng (H3) 3)
power (MC specification).
"
or
or
"
"
67"
67
"
or
or
"
"
(L)"
(L)
"
(7) Change attachment 1 control lever to other normal
(7) Change attachment 1 control lever to other normal
control lever
control lever
Not
Not
(9) Repair or replace
(9) Repair or replace
FC-IN harness
FC-IN harness
(12) Replace attachment 1 switch
(12) Replace attachment 1 switch
E-36-6
E-36-6
ty
ty
,
,
Shorted
Shorted
occurs during pump operation and then
attachment 1 control lever or attachment 1
power (FC specification). Detects
If
If
this
this
fault
fault
occurred
occurred
turning
turning
on
on
power
power
FC specification
FC specification
changed
changed
Error
Error
(10) Replace attachment
(10) Replace attachment
1
1
control
control
501163
501163
2-77
2-77
when
when
changed
changed
lever
lever
Advertisement
