Mitsubishi FB13PNT, Quick Start Manual

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2-15 2-15
501135 501135
CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
3. 3.5 5 Tr Trac acti tion on In Inve vert rter er L. L.H. H., O , Ove verh rhea eati ting ng (E (E6) 6)
Error code: E6 Error code: E6
Situation Situation
Controller/mo Controller/motor overheat indicator ON. tor overheat indicator ON. Poor pulling power and Poor pulling power and acceleration. Normal pump motor and acceleration. Normal pump motor and power power
steering operations. Service tool "Alarm status" and "E6" displayed. steering operations. Service tool "Alarm status" and "E6" displayed.
Possible Possible
cause cause
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
faulty left traction inverter PC board, abnormal power supply of logic unit, faulty radiation of left logic unit, faulty radiation of left side traction side traction
inverter, faulty display unit. inverter, faulty display 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 cool for 15 minutes (1) Let truck cool for 15 minutes
Overheat Overheat indi indi cator cator ON ON Overheat Overheat indi indi cator cator OFF OFF
(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
(7) Confirm temperature of controller and head (7) Confirm temperature of controller and head
capa capa citor with input citor with input monitor 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 ) )
(5) Replace left traction (5) Replace left traction
inverter inverter
(6) Clean mounting (6) Clean mounting
surfac surfac e, e, apply apply thermal thermal
paste, paste, then then reins reins tall tall
inverter inverter
(10) Perform inverter discharging work (10) Perform inverter discharging work
(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
Without service tool Without service tool
With service tool With service tool
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 and even Thermal paste film should be thin and even
Normal Abnormal Normal Abnormal
(9) Normal (9) Normal