What this code means

This is just a warning when a Lifting/Lowering request is active at key-on.

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

Possible causes / checks (from the source)

The possible reasons for this alarm are (use the readings in the TESTER to facilitate the troubleshooting): - When MDI-PRC is absent: at least one between LIFTING SWITCH (CNB#9) or DESCENT SWITCH (CNB#8) active at key on. - When TRUCK TYPE is Level=1: at least one between LIFTING SWITCH (CNB#9), DESCENT SWITCH (CNB#8), DIGITAL INPUT#1 (CNA#14) or DIGITAL INPUT#2 (CNA#15) active at key-on. - When TRUCK TYPE is Level=2: at least one between LIFTING SWITCH (CNB#9) or DESCENT SWITCH (CNB#8) active at key-on. - When TRUCK TYPE is Level=3: at least one between LIFTING SWITCH (CNB#9) or DESCENT SWITCH (CNB#8) active at key-on. A failure in the logic is possible too. When all of the above conditions

Need the part?

If diagnosis points to a failed sensor, solenoid, controller or harness part, send us the code (MDI-PRC 91), machine model and serial number — we quote genuine and OEM replacement parts for export.