AE0ZP0EC - AC-0 SSL SENSORED - User Manual Page - 85/100
cause for the alarm.
2) STBY I HIGH
MDI-PRC Code = 53
- Cause: This diagnosis is executed only when the main contactor is
opened and asked to be closed (e.g. at key on or when the
main contactor is opened and a new motion request turns
active). Then the outputs of the Current amplifiers must be in a
narrow window close to 2.5 Vdc (from 2.26 V to 2.74 V).
Otherwise this STBY I HIGH alarm occurs.
- Remedy: If the alarm occurs permanently, it is necessary to replace the
controller.
3) I=0 EVER
MDI-PRC Code = 49
- Cause: This test is carried out when the motor is running, and it verifies
that the current feedback sensor is not constantly stuck to 0.
- Remedy: If everything is ok for what it concerns the motor, the problem
could be in the current sensor or in the related circuit.
11.1.6 Six Blinks Alarms
1) COIL SHORTED
MDI-PRC Code = 76
- Cause: This alarm occurs when there is an overload on one of the
following connections: CNA#1, CNA#3, CNA#4 and CNA#6.
Typically the problem is due to a short circuit of one of the coils
connected to these outputs. After the overload has removed,
the alarm exits automatically by releasing and then enabling a
travel demand.
- Remedy: Check the coils of the main contactor (CNA#1), of the
electromechanical brake (CNA#3), of the pump contactor
(CNA#4), of the Aux valve (CNA#6).
2) CONTACTOR DRIVER
MDI-PRC Code = 75
- Cause: This alarm occurs when the voltage on the Main Contactor is
smaller than expected: this means that the Main Contactor Coil
has a null voltage when supplied.
- Remedy: Check the coils of the Main Contactor (CNA#1) is not short
circuited. If it isn’t, probably it is necessary to replace the
controller because the driver of the Main Contactor is broken.
3) CONTACTOR OPEN
MDI-PRC Code = 38
- Cause: The main contactor coil has been driven by the logic board, but
the contactor does not close.
- Remedy: Two possible reasons: the wires to the coil are interrupted or
not well connected or the contact of the contactor is not
properly working.
4) CONTACTOR CLOSED
MDI-PRC Code = 37
- Cause: The controller checks if the MC contact is closed when the coil
isn’t driven, trying to discharge the capacitor bank. If they don’t
discharge, the fault condition is entered.
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