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Heli Forklifts · 121
Pump potentiometer value out of range
What this code means
PUMP POT VALUE OUT OF RANGE ERROR - the value of the pump potentiometer is out of range (below 30 or above 2800).
Applies to: G Series 3-wheel electric CPD13SH/15SH, Danaher control system (OPT10 meter codes, service manual Table 8-2).
Need the part?
If diagnosis points to a failed sensor, solenoid, controller or harness part, send us the code (121), machine model and serial number — we quote genuine and OEM replacement parts for export.
Ask for the replacement part on WhatsAppSource: HELI CPD13SH/15SH G Series Operation & Service Manual (S164-3-2017), Table 8-2 Danaher system error codes (HELI Canada document library). Single published source — confirm against the manual for your exact model before ordering parts. Compiled 2026-10-30. No manufacturer affiliation.