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ZAPI Controllers · MDI-PRC 38
Contactor Open

What this code means

The main contactor coil has been driven by the logic board, but the contactor does not close.

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

Possible causes / checks (from the source)

Two possible reasons: the wires to the coil are interrupted or not well connected or the contact of the contactor is not properly working.

Need the part?

If diagnosis points to a failed sensor, solenoid, controller or harness part, send us the code (MDI-PRC 38), machine model and serial number — we quote genuine and OEM replacement parts for export.

Source: ZAPI AC-0 SSL Sensored User Manual (AE0ZP0EC) via ManualsLib. Single published source — confirm against the manual for your exact model before ordering parts. Compiled 2026-10-30. No manufacturer affiliation.