Page - 70/81 AFCZP0BC- COMBIACX & ACEX - User Manual
27) “WRONG ZERO”
Cause:
The outputs of the amplifiers (used to measure the traction motor voltage) are
checked to be included into a range . This alarm occurs when the voltage
signals >3V or <2V at the init.
Troubleshooting:
This type of fault is not related to external components; replace the controller.
28) ”EVP COIL OPEN”
Cause:
This fault appears when the LOWER EVP output is used (parameter “EVP
TYPE” in “SET OPTION” menu is set ANALOG or DIGITAL) but no load is
connected between the output and PAUX positive.
Troubleshooting:
A) It is suggested to check the harness, in order to verify if EVP coil is
connected to the right connector pin and if it is not interrupted.
B) If, even connecting the coil to the right pin or replacing it, the alarm is still
present than the problem is inside the controller logic board, replace it.
29) “AUX BATT. SHORT”
Cause:
A) The coil on the aux output is not correctly connected.
B) The smartdriver inside the controller is damaged.
Troubleshooting:
- It is suggested to check that the coil is correctly connected between B1 and
B5.
- If no problem is found on the coil, the problem is inside the controller.
30) “PEV NOT OK”
Cause:
The PEV connector (B2) is not connected to the battery or the voltage is
different. This alarm occours if one output between EV1, EV2, EV3, HORN is
present or AUX OUT FUNCTION is PRESENT (if POSITIVE EB= 0 or 2). In
other words, one of the output load is connected to PEV.
All the valves (EVP, EV1, EV2, EV3) are stopped. Horn is stopped.
Traction is stopped if the AUXOUT is used for an electrobrake and PEV is
indispensable for it (AUX OUT FUNCTION = PRESENT, POSITIVE EB 0 or 2).
Pump is stopped if EV1, EV2 or EV3 are used (PRESENT).
Troubleshooting:
Check B2 connector: it must be connected to the battery voltage (after the main
contactor)
31) “INIT VMN LOW”
Cause:
Before switching the LC on, the software checks the power bridge voltage
without driving it.
The software expects the voltage to be at a “steady state” value.
If it is too low, this alarm occours.
Troubleshooting:
Please check
- Motor internal connections (ohmic continuity)
- Motor power cables connections
- Motor leakage to truck frame
- If the motor connections are OK, the problem is inside the controller
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