What this code means

This alarm occurs when both a Lifting request and a Lowering request are active at the same time.

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

Possible causes / checks (from the source)

If the MDI-PRC is absent, check only the wiring of the main Lifting/Lowering pair (CNB#8 and CNB#9); if the MDI-PRC is present check also the wiring of the Aux Lifting/Lowering pair (CNA#14 and CNA#15). (Use the readings in the TESTER to facilitate the troubleshooting). A failure in the logic is possible too. When you have verified the Lifting/Lowering switches are fine working and the wiring is right, it is necessary to replace the controller.

Need the part?

If diagnosis points to a failed sensor, solenoid, controller or harness part, send us the code (MDI-PRC 90), machine model and serial number — we quote genuine and OEM replacement parts for export.