83
MicroController Control System Troubleshooting
CHECKS
Measure the maximum drive current at A2 cable in stall
condition.
Key switch and seat switch ON. Direction switch to
forward and depress the accelerator over than half
position.
The current should be 650A for 5 seconds.
Also the 650A current will be flowed 5 seconds more
and then display F0.
OK Below 500A
PROBLEM 28
Display = “F0”, no lift truck operation.
POSSIBLE CAUSE
Excessive drive motor currents due to pushing or ramp
application. Failed drive motor. Failed logics.
Weak or discharged battery.
Set the “IMAX.” to level 9 in
“PARAMETER SETTING” of drive controller.
Place lift truck into operation.
Does the “F0” occur due to excessive pushing or abuse. Ensure that the battery is not being deep
discharged, causing high currents. Inspect the battery for poor maintenance or bad cells.
Explain situation to the customer. If abuse continues, any drive failure will not be warranted.
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