Genie Z-30/20N, Z-34/22, Z-45/25 DC: Curtis motor controller
Genie error code 21 — THROTTLE FAULT 1 / THROTTLE FAULT 2
Message on the display: THROTTLE FAULT 1 / THROTTLE FAULT 2
Code 21 occurs in machines: Genie Z-30/20N, Z-45/25J DC, Z-30/20N RJ, Z-34/22, Z-45/25 DC, Z-45/25J, Z-45/25 BE, Z-34/22 BE, Z-34/22N.
blocking fault
Machine will not drive.
Description from the Genie service manual, in the original wording.
Possible causes
- THROTTLE FAULT 1: Open in wht/red wire #32 at pin 14 or red/wht wire #29 at pin 16 on the motor controller going from drive joystick to pins 14 and 16 at the motor controller OR pin 14 is internally shorted to power or ground OR the potentiometer on the drive joystick is defective.
- THROTTLE FAULT 2: Pin 14 (wht/red #32) is shorted to power or ground OR the potentiometer on the drive joystick is defective.
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
THROTTLE FAULT 1: Consult Genie Product Support. THROTTLE FAULT 2: Consult Genie Product Support.
Source: Genie Service Manual Z-30/20N, Z-34/22, Z-45/25 DC, Curtis 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 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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