Zapi ACE0 2mC, User Manual

Page: 111 / 155

AF6ZP0CA – COMBIAC0 & ACE0 2uC – User Manual Page – 111/155
- In case no failures/problems have been found, the problem is in the
controller, which has to be replaced.
CONT. DRV. EV 02
(MDI/LED code = 21)
Cause:
AUX valve driver is not able to drive the load.
Troubleshooting:
The device or its driving circuit is damaged. Replace the controller.
CONTACTOR CLOSED
(MDI/LED code = 37)
Cause
Before driving the LC coil, the controller checks if the contactor is stuck. The
controller drives the power bridge for several dozens of milliseconds, trying to
discharge the capacitors bank. If the capacitor voltage does not decrease by
more than a certain percentage of the key voltage, the alarm is raised.
Troubleshooting
It is suggested to verify the power contacts of LC; if they are stuck, is
necessary to replace the LC.
CONTACTOR DRIVER
(MDI/LED code = 75)
Cause
The LC coil driver is not able to drive the load. The device itself or its driver
circuit is damaged.
Troubleshooting
This type of fault is not related to external components; replace the logic
board.
CONTACTOR OPEN
(MDI/LED code = 38)
Cause
The LC coil is driven by the controller, but it seems that the power contacts
do not close. In order to detect this condition the controller injects a DC
current into the motor and checks the voltage on power capacitor. If the
power capacitors get discharged it means that the main contactor is open.
Troubleshooting
-
LC contacts are not working. Replace the LC.
- If LC contacts are working correctly, contact a Zapi technician.
CONTROLLER MISM.
(MDI/LED code = 12)
Cause
The software is not compatible with the hardware. Each controller produced
is “signed” at the end of line test with a specific code mark saved in EEPROM
according to the customized Part Number.
According with this “sign”, only the customized firmware can be uploaded.
Troubleshooting
-
Upload the correct firmware.
- Ask for assistance to a Zapi technician in order to verify that the firmware
is correct.