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CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
3. 3.5 5
Tr Trac acti tion
Error code: E6
Error code: E6
Situation
Situation
Possible
Possible
cause
cause
Trigger of
Trigger of
the error
the error
code
code
Checks
Checks
(1) Let truck cool for 15 minutes
(1) Let truck cool for 15 minutes
(8) Disconnect battery plug. Wait until inverter
(8) Disconnect battery plug. Wait until inverter
temperature becomes close to room temperature
temperature becomes close to room temperature
(10) Perform inverter discharging work
(10) Perform inverter discharging work
on In Inve
vert rter er L. L.H. H., O
, Ove
verh rhea
Controller/motor overheat indicator ON.
Controller/mo
tor overheat indicator ON. Poor pulling power and
steering operations. Service tool "Alarm status" and "E6" displayed.
steering operations. Service tool "Alarm status" and "E6" displayed.
Overheating of left side traction inverter, faulty left side traction inverter thermal sensor, open harness wiring,
Overheating of left side traction inverter, faulty left side traction inverter thermal sensor, open harness wiring,
faulty left traction inverter PC board, abnormal power supply of logic unit, faulty radiation of left
faulty left traction inverter PC board, abnormal power supply of
inverter, faulty display unit.
inverter, faulty display unit.
Controller temperature is out of
Controller temperat
ure is out of range of -25 °C
range of -25 °C to 110 °C (-13 °F to 230 °F).
range of -25 °C to 110 °C (-13
Overheat
Overheat
indi
indi
cator
cator
ON
ON
With service tool
With service tool
Without service tool
Without service tool
eati ting
ng (E (E6) 6)
Poor pulling power and acceleration. Normal pump motor and
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 to 230 °F). Recovers when tempe
Recovers when temperature is in range of -20 to 70 °C (-4
(2) Left traction inverter becomes normal
(2) Left traction inverter becomes normal
(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
(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 and even
Thermal paste film should be thin and even
(5) Replace left traction
(5) Replace left traction
inverter
inverter
(7) Confirm temperature of controller and head
(7) Confirm temperature of controller and head
capa
capacitor with input
Less
Less
than
than
o
o
r
r m
mo
o
r
r
acceleration. Normal pump motor and power
logic unit, faulty radiation of left side traction
°F). Capacitor temperature is out of
rature is in range of -20 to 70 °C (-4 to 158 °F).
Overheat
Overheat
indi
indi
cator
cator
OFF
OFF
If problem reoccurs
If problem reoccurs
Normal
Normal
Normal
Normal
Abnormal
Abnormal
(6) Clean mounting
(6) Clean mounting
surface,
surfac
paste,
paste,
inverter
inverter
citor with input
monitor
monitor
-20
-20
°C(-
°C(-
4
4
°F)
°F)
-20
-20
e
e t
th
h
a
a
n
n
7
7
0
0
°
°
C
C
(
(
1
1
5
5
8
8
°
°
F
F
)
)
(
(
- 4
- 4
(9) Normal
(9) Normal
501135
501135
2-15
2-15
power
side traction
to 158 °F).
e,
apply
apply
thermal
thermal
then
then
reinstall
reins
tall
°C
°C
to
to
70
70
°C
°C
°
°
F t
F
to
o
1
1
5
5
8 °
8
°F
F
)
)
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