2-21
2-21
501137
501137
CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
3.
3.7
7
PS
PS Co
Cont
ntro
roll
ller
er,O
,Ove
verh
rhea
eati
ting
ng (E
(E9)
9)
Error code: E9
Error code: E9
Situation
Situation
Controller/m
Controller/motor overheat indicator ON. Poor pulling
otor overheat indicator ON. Poor pulling power and acceleration. Normal pump motor. Service
power and acceleration. Normal pump motor. Service
tool "Alarm status" and "E9"
tool "Alarm status" and "E9" displayed.
displayed.
Possible
Possible
cause
cause
Overheating of PS controller, faulty PS controller thermal sensor, open harness wiring, faulty PC board,
Overheating of PS controller, faulty PS controller thermal sensor, open harness wiring, faulty PC board,
abnormal power supply of logic unit,
abnormal power supply of logic unit, faulty radiation of left traction inverter, faulty display
faulty radiation of left traction inverter, faulty display unit.
unit.
Trigger of
Trigger of
the error
the error
code
code
Controller temperat
Controller temperature is out of
ure is out of range of -25 °C
range of -25 °C to 100 °C
to 100 °C (-13 °F to 212
(-13 °F to 212 °F). Capacitor temperature is out of
°F). Capacitor temperature is out of
range of -25 °C to 110 °C (-13
range of -25 °C to 110 °C (-13 °F to 230 °F).
°F to 230 °F). Recovers when tempe
Recovers when temperature is in range of -20 to 70 °C (-4
rature is in range of -20 to 70 °C (-4 to 158 °F).
to 158 °F).
Checks
Checks
(1) Let truck co
(1) Let truck co
ol for
ol for
15 minutes
15 minutes
and turn the key off
and turn the key off
and on
and on
O
O
v
v
e
e
r
r
h
h
e
e
a
a
t
t
i
i
n
n
d
d
i
i
c
c
a
a
t
t
o
o
r
r
O
O
N
N
O
O
v
v
e
e
r
r
h
h
e
e
a
a
t
t
i
i
n
n
d
d
i
i
c
c
a
a
t
t
o
o
r
r
O
O
F
F
F
F
(2) Left traction inverter becomes normal
(2) Left traction inverter becomes normal
(
(
5)
5)
R
R
ep
ep
la
la
c
c
e E
e E
P
P
S c
S c
on
on
tr
tr
ol
ol
le
le
r
r
(
(
6)
6)
C
C
le
le
an
an
mo
mo
un
un
ti
ti
ng
ng
surface,
surface,
apply thermal paste,
apply thermal paste,
then reinstall EPS
then reinstall EPS
controller
controller
(10) Perform inverter discharging work
(10) Perform inverter discharging work
Without service tool
Without service tool
With service tool
With service tool
(3) Check if truck is operated on steep upgrade or to pull
(3) Check if truck is operated on steep upgrade or to pull
large cargo load
large cargo load
If problem reoccurs
If problem reoccurs
Normal
Normal
(4) Perform inverter discharging work
(4) Perform inverter discharging work
Check thermal paste applied on inverter mounting
Check thermal paste applied on inverter mounting
Surface
Surface
Thermal paste film should be thin
Thermal paste film should be thin
and even
and even
Normal
Abnormal
Normal
Abnormal
(8) Disconnect battery plug
(8) Disconnect battery plug
Wait until EPS controller temperature becomes close to
Wait until EPS controller temperature becomes close to
room t
room t
emperatur
emperatur
e
e
(7) Confirm temperature of controller and head capacitor
(7) Confirm temperature of controller and head capacitor
with input monitor
with input monitor
Less
Less
than
than
-20
-20
°C(-
°C(-
4
4
°F)
°F)
-20
-20
°C
°C
to
to
70
70
°C
°C
o
o
r m
r m
o
o
r
r
e t
e t
h
h
a
a
n
n
7
7
0
0
°
°
C
C
(
(
1
1
5
5
8 °
8 °
F
F
)
)
(
(
- 4
- 4
°
°
F t
F t
o
o
1
1
5
5
8 °
8 °
F
F
)
)
(9) Normal
(9) Normal
Summary of Contents for FB13PNT
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