Genie S and Z boom lifts: ‘source + error type’ codes (S-40, S-45, S-80, S-85, Z-60/34, Z-51/30J)
Genie error code 42-21 — Turntable rotate directional valves — Fault
Message on the display: Turntable rotate directional valves — Fault
Code 42-21 occurs in machines: Genie S-80, S-85, Z-60/34, S-40, S-45, Z-51/30J.
blocking fault
Limited speed and direction frozen at zero and neutral. Alarm sounds indicating fault.
Description from the Genie service manual, in the original wording.
Possible causes
The manual does not list the causes for this code: the service technician establishes them during diagnosis of the machine.
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
Power up controller with problem corrected.
Source: Genie Service Manual S-80/S-85 (111165), S-40/S-45 (102521), Z-60/34 and Service and Repair Manual Z-51/30J (1268553GT), Control System Fault Codes tables.
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 42-21 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.
Genie service · Genie parts · All Genie codes of this system
Neighbouring Genie codes
- 41-16Turntable rotate joystick — Value at 0V
- 41-17Turntable rotate joystick — Not calibrated
- 41-18Turntable rotate joystick — Just calibrated
- 43-12Turntable rotate flow control valve — Value too high
- 43-15Turntable rotate flow control valve — Value too low
- 43-17Turntable rotate flow control valve — Not calibrated