What this code means

This is a safety related test. It is a self diagnosis test within the logic. The watch dog circuit is composed by two monostable multivibrators so there is a double check of software execution.

Applies to: ZAPI ACE0 / COMBIAC0 controller.

Possible causes / checks (from the source)

This alarm could be caused by an hardware failure in one of two (or both) multivibrator or due to a software execution problem. For both cases it is an internal fault of the controller which must be replaced.

Need the part?

If diagnosis points to a failed sensor, solenoid, controller or harness part, send us the code (WATCHDOG), machine model and serial number — we quote genuine and OEM replacement parts for export.