Genie XC, HF and J boom lifts (S-60 XC, S-80 XC, S-85 XC, S-80 HF, S-85 HF, S-60 J, S-80 J)
Genie error code 71-21 — ESTOP Circuit — ESTOP Return circuit mismatch
Message on the display: ESTOP Circuit — ESTOP Return circuit mismatch
Code 71-21 occurs in machines: Genie S-60 XC, S-80 XC, S-85 XC, S-80 HF, S-85 HF.
blocking fault
The Genie display shows code 71-21 with the message “ESTOP Circuit — ESTOP Return circuit mismatch”. It is a blocking fault or a safety-related code: do not use the machine until the cause has been found and removed.
Effect on the machine: ESTOP circuit cannot complete, preventing machine functions.
Possible causes
- TCON detected that ESTOP Return circuits are not matching, indicating a fault with either P23PWR or P23RET.
What you can do
Switch the machine off with the emergency stop and switch it on again. If the code comes back, do not use the machine and call service.
Solution from the manual
* Check for open and short circuits in the boom cable. * Verify that there is low resistance (less than five ohms) on the cabling between TCON J5-11 and PCON J15-11 (BK wire in harness and boom cable). An open circuit between these pins indicates a harness or cable fault. * Verify that there is low resistance (less than five ohms) on the cabling between TCON J5-10 and PCON J15-10 (RD wire in harness and boom cable). An open circuit between these pins indicates a harness or cable fault.
Source: Genie Service and Repair Manuals (Part No. 1316494, 1315679, 1288652, 1280490, 1285305, 1285307), Fault Codes section.
The descriptions are quoted from the manufacturer's service documentation and are for guidance only. Clearing codes, calibrations and repairs are carried out by a qualified service technician according to the manual for the specific serial number. A machine with an active blocking code must not be used until the cause has been removed.
Does code 71-21 not go away?
RK Rental services Genie lifts at our workshop or on site at the customer's premises (construction site, factory, warehouse). We read the code, remove the cause and select the parts by serial number.
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