2-127
2-127
E-27
E-27
501138
501138
2
2
1
1
CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
3.
3.57
57 PS M
PS Mot
otor O
or Ove
ver-
r-cu
curr
rren
ent (A
t (A5)
5)
Error code: A5
Error code: A5
Situation
Situation
Display: "A5".
Display: "A5". All truck operations inhibited. Line contactor OP
All truck operations inhibited. Line contactor OPEN and ST contactor OPEN.
EN and ST contactor OPEN.
All operations inhibited except
All operations inhibited except
mast
mast
lowering operation.
lowering operation.
Possible
Possible
cause
cause
Faulty PS motor. (Contain the bearing sensor)
Faulty PS motor. (Contain the bearing sensor)
Faulty contact or wire breakage of PS motor speed sensor harness.
Faulty contact or wire breakage of PS motor speed sensor harness.
Faulty PS inverter.
Faulty PS inverter.
Faulty contact or wire breakage of DSP flat
Faulty contact or wire breakage of DSP flat cable in PS inverter.
cable in PS inverter.
Faulty DSP card of PS
Faulty DSP card of PS inverter.
inverter.
Faulty main harness.
Faulty main harness.
Trigger of
Trigger of
the error
the error
code
code
Motor current is more than 116 A (Moment) or 113 A (1 mS) or 112 A (1.6 mS).
Motor current is more than 116 A (Moment) or 113 A (1 mS) or 112 A (1.6 mS).
Checks
Checks
(2) Check EPS motor body and terminal for burning and small
(2) Check EPS motor body and terminal for burning and small
Normal
Abnormal
Normal
Abnormal
(4) Replace EPS motor
(4) Replace EPS motor
(9) Replace EPS motor or
(9) Replace EPS motor or
cables
cables
(3) Chec
(3) Chec
k motor terminal (U
k motor terminal (U
W phases)
W phases)
for shorting to t
for shorting to t
he
he
motor body and truck frame
motor body and truck frame
N
N
o
o
t
t
s
s
h
h
o
o
r
r
t
t
i
i
n
n
g
g
s
s
h
h
o
o
r
r
t
t
i
i
n
n
g
g
(8) Replace EPS controller
(8) Replace EPS controller
(6) Remove the all cables of motor and traction inverter
(6) Remove the all cables of motor and traction inverter
terminals (P N U W )
terminals (P N U W )
Check motor terminals for shorting to the motor body
Check motor terminals for shorting to the motor body
Check the cables for shorting to the frame
Check the cables for shorting to the frame
N
N
o
o
t
t
s
s
h
h
o
o
r
r
t
t
i
i
n
n
g
g
s
s
h
h
o
o
r
r
t
t
i
i
n
n
g
g
(1) Disconnect battery plug, then perform inverter discharging work
(1) Disconnect battery plug, then perform inverter discharging work
(7) Secure cable if loose or
(7) Secure cable if loose or
connect cable correctly
connect cable correctly
(5) Confirm cable looseness and improper connections
(5) Confirm cable looseness and improper connections
(U W phases) for EPS controller and motor
(U W phases) for EPS controller and motor
N
N
o
o
r
r
m
m
a
a
l
l
A
A
b
b
n
n
o
o
r
r
m
m
a
a
l
l
(11) Replace EPS
(11) Replace EPS
controller
controller
(10) Steering and check the jerky at very low speed
(10) Steering and check the jerky at very low speed
N
N
o
o
r
r
m
m
a
a
l
l
A
A
b
b
n
n
o
o
r
r
m
m
a
a
l
l
(12) Replace EPS moter
(12) Replace EPS moter
Summary of Contents for FB13PNT
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