Mitsubishi FB13PNT, Quick Start Manual

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CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
3. 3.3 3 Pu Pump mp Mo Moto tor, r,Ov Over erhe heat atin ing( g(E2 E2))
Error code: E2 Error code: E2
Situation Situation
Controller/m Controller/motor overheat indicator ON. Lifting otor overheat indicator ON. Lifting speed slower than normal. speed slower than normal. Normal traction motorand power Normal traction motorand power
steering operations. Service tool "Alarm status" and "E2" displayed. steering operations. Service tool "Alarm status" and "E2" displayed.
Possible Possible
cause cause
Overheating of pump motor, faulty pump motor or thermal sensor, faulty Overheating of pump motor, faulty pump motor or thermal sensor, faulty or open harness wiring, faulty p or open harness wiring, faulty pump ump
motor inverter DSP card, abnormal power supply of logic unit, motor inverter DSP card, abnormal power supply of logic unit, abnormal oil pressure of gear pump or hydraulic abnormal oil pressure of gear pump or hydraulic
lines, faulty display unit. lines, faulty display unit.
Trigger of Trigger of
the error the error
code
code
Motor tempera Motor temperature is out of range of -25 °C to 145 ture is out of range of -25 °C to 145 °C (-13 °F to 293 °F). °C (-13 °F to 293 °F).
Recovers when motor te Recovers when motor temperature is in range of -20 to 70 °C (-4 to mperature is in range of -20 to 70 °C (-4 to 158 °F). 158 °F).
Checks Checks
(1) Let truck cool for 15 minutes (1) Let truck cool for 15 minutes
Overheat Overheat indicator indicator ON ON Overheat Overheat indicator indicator OFF OFF
(2) Pump motor becomes normal (2) Pump motor becomes normal
(3) Check if truck is operated to lift large cargo load (3) Check if truck is operated to lift large cargo load
(4) Perform inverter discharging work (4) Perform inverter discharging work
(5) Check oil pressure of gear pump and hydraulic lines (5) Check oil pressure of gear pump and hydraulic lines
Normal Abnormal Normal Abnormal
(6) Replace pump motor (6) Replace pump motor
(7) Repair or replace (7) Repair or replace
gear pump or piping gear pump or piping
(8) Co (8) Co nfirm temperature of pump nfirm temperature of pump motor with motor with
input/output monitor input/output monitor
Less Less than than -20 -20 °C(- °C(- 4 4 °F) °F) -20 -20 °C °C to to 70 70 °C °C
or or m m o o re re t t ha ha n n 70 70 ° ° C C (1 (1 5 5 8 8 ° ° F F ) ) (-4 (-4 ° ° F t F t o o 15 15 8 ° 8 ° F) F)
(10) Normal (10) Normal
(9) Disconnect battery plug (9) Disconnect battery plug
Wait until Wait until pump pump motor t motor t emperaturebecomes clos emperaturebecomes clos e t e t o o
room t room t emperatur emperatur e e
(11) Perform inverter discharging work (11) Perform inverter discharging work
(12) Dis (12) Dis conn conn ect connec ect connec tor E-16 tor E-16 of pump of pump motor motor
speed and thermal sensor. Measure resistance speed and thermal sensor. Measure resistance
between E between E -16-2 -16-2 and E-16-1 and E-16-1
2.2kΩ at 70°C 2.2kΩ at 70°C (158°F) to (158°F) to
82kΩ 82kΩ at at -20°C -20°C (-4°F) (-4°F) Out Out of of range range
(13) Replace pump motor (13) Replace pump motor
If problem reoccurs If problem reoccurs
Normal Normal
With service tool With service tool
Without service tool Without service tool