What this code means

This is just a warning for an incorrect starting sequence.

Applies to: ZAPI AC-0 SSL Sensored inverter (traction & pump configuration).

Possible causes / checks (from the source)

The possible reasons for this alarm are (use the readings in the TESTER to facilitate the troubleshooting): a) A travel demand active at key on b) The tiller switch active at key-on c) The H&S input active at key-on d) The Quick inversion active at key-on A failure in the logic is possible too. When all of the above conditions were checked and nothing was found, replace the controller.

Need the part?

If diagnosis points to a failed sensor, solenoid, controller or harness part, send us the code (MDI-PRC 79), machine model and serial number — we quote genuine and OEM replacement parts for export.