BT ForkLifts

Ed67

06 VMN LOW
Condition for error detection
Failure in the VMN test.
This test starts when the ignition key is turned ON and there is no consuption of ampere. The alarm
appears if there is a leakage of current on one or more phases; check the connections of the 3 power
cables from the logic unit to the traction motor and the cables condition. In order to point out if the
fault is produced by an internal or external cause proceed as follow:
connect the traction logic unit to the lifting motor and check if the alarm “06” appears on the display.
YES: repace the logic unit
NO: check the traction motor insulation.
Two of the phases of the motor
are kept under control by
shunts. If the logic unit detects a
leakage of current keeps the
truck stopped.