EP Equipment 508000003143, Operation Manual

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40
28
PUMP VMN LOW
The pump motor output is lower
than expected, considering the
PWM duty cycle applied.
A) If the problem occurs at start up
(the LC does not close at all),
check:
- Motor internal connections;
- Motor power cables connections;
- If the motor connection are OK,
the problem is inside the
controller.
B) If the problem occurs after
closing the LC (the LC closes and
then opens back again), check:
- Motor internal connections;
- If motor windings/cables have
leakages towards truck frame;
- If no problem are found on the
motors, the problem is inside the
controller.
C) If the alarm occurs during motor
running, check:
- Motor internal connections;
- If motor windings/cables have
leakages towards truck frame;
- That the LC power contact closer
properly, with a good contact;
- If no problem are found on the
motors, the problem is inside the
controller, it is necessary to
replace the logic board.
29
PUMP VMN
HIGH
This test is carried out when the
pump motor is turning (PWM
applied). The pump motor output is
higher than expected, considering
the PWM applied.
-Motor internal connections
-If motor windings/cables have
leakages towards truck frame
-If no problem are found on the
motors, the problem is inside the
-controller, it is necessary to
replace the logic board.
Error Message
Possible cause Fault elimination
Error
Error text