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3. TROUBLESHOOTING GUIDE
3.2 CHECKING BEFORE TROUBLESHOOTING
(1) Checking wiring and terminals for looseness
If a bolt or nut of the controller gets loose, that part will be heated and burn out. When you nd a
loosened bolt or nut or a heated area, polish the contacting areas and retighten the bolt/nut. Give
close watch especially on the parts where a large current ows such as the minus terminal, fuses,
motors, contactors, etc. If the minus terminal is loosened, a large current will ow, which may
damage the board.
(2) Checking wire harness and cables visually
If any outer cover of wire harness or cables is damaged, insulate it with a vinyl tape. If any core
wire inside is damaged, replace it with a new one.
(3) Checking fuses
Check main fuse (in the controller) and the fuse in the fuse box.
(4) Checking the communication line
Check whether the LCD panel display looks correct.
When the P/E display changes by ipping the switch, the communication line is working correctly.
The hourglass symbol on the LCD panel should blink when normal.
(5) Leaks from body
The wiring of the electric truck is insulated from the frame. If there is any leak from the body,
various troubles will occur. Be sure to check for leaks.
It is recommended to wipe off dirt on the battery surface with a wet waste cloth or paper and dry
the cleaned surface by blowing air.
(Criteria)
Wiring side: If leak resistance is 100 k-ohm or more, the wiring condition in the wiring side is
judged as good.
Frame to body receptacle (+)
Frame to body receptacle (-)
Battery side: If the leak is 1 k-ohm impedance with 1 V or less, the wiring condition in the
battery side is judged as good.
Frame to battery (+)
Frame to battery (-)
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