Genie DC and FE electric boom lifts (Z-60 DC, S-60 DC, Z-45 DC, Z-45 FE, Z-33/18 DC)
Genie error code 140-77 — Pump & Drive Controllers — Supervisor Fault
Message on the display: Pump & Drive Controllers — Supervisor Fault
Code 140-77 occurs in machines: Genie Z-45 DC, Z-45 FE.
blocking fault
Controller IDs: 136=Pump [ECON] 137=Left Front [LF] 138=Right Front [RF] 139=Left Rear [LR] 140=Right Rear [RR]
Description from the Genie service manual, in the original wording.
Effect on the machine: ShutdownMotor; ShutdownMainContactor; ShutdownEMBrake; ShutdownThrottle; ShutdownInterlock; ShutdownDriver1,2,3 &4; ShutdownPD; FullBrake.
Possible causes
- The Supervisor has detected a mismatch in redundant readings.
- Internal damage to Supervisor microprocessor.
- Switch inputs allowed to be within upper and lower thresholds for over 100 milliseconds.
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
Set: Mismatched redundant readings; damaged Supervisor; illegal switch inputs. Clear: Check for noise or voltage drift in all switch inputs; check connections; cycle key switch.
Source: Genie Service and Repair Manuals (Part No. 1307785, 1299608, 1297714, 1271125, 1268514), 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 140-77 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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