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Hangcha Forklifts · 3,4
Contactor not installed or not closing

What this code means

The contactor has not been installed or does not close (lift controller LED code 3,4).

Applies to: CPD J-series electric - lift (oil pump) controller, LED codes.

Possible causes / checks (from the source)

Connection of the main contactor coil is loose; main contactor works abnormally.

Need the part?

If diagnosis points to a failed sensor, solenoid, controller or harness part, send us the code (3,4), machine model and serial number — we quote genuine and OEM replacement parts for export.

Source: Hangcha CPD J-series service manual fault table of lift (oil pump) controller, as reproduced by ForkliftPDFManuals.com and Truck-FreeWorkshop.com (two libraries agree). Cross-checked in two independent sources. Compiled 2026-10-30. No manufacturer affiliation.