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Genie S-85 XC FE/E, S-60 DC, Z-60 DC: drive motor controllers

Genie error code 0x2121 — Undervoltage Cutback

Message on the display: Undervoltage Cutback

Code 0x2121 occurs in machines: Genie S-85 XC FE, S-85 XC E, Z-60 DC, S-60 DC.

warning / function limited

Flash pattern 2-3 (flash code 0x23).

Description from the Genie service manual, in the original wording.

Effect on the machine: Reduced drive torque. Reduced regen braking torque. Fault Action: None, unless a fault action is programmed in VCL.

Possible causes

  • Batteries need recharging. Controller is performance limited at this voltage.
  • Battery parameters are misadjusted. Non- controller system-drain on battery.
  • Battery resistance too high.
  • Battery disconnected while driving.
  • Blown B+ fuse or main contactor did not close. See Programmer » System Monitor menu » Controller» Currents » UnderVoltageCutback. See Programmer » System Monitor menu » Controller» Capacitor Voltage.

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: Capacitor bank voltage dropped below the UnderVoltageCutback limit with the FET bridge enabled. Clear: Bring the capacitor voltage above the controller’s UnderVoltageCutback limit.

Source: Genie Service and Repair Manuals (Part No. 1337498, 1307785, 1299608), drive controller code table.

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 0x2121 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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