JLG ES series scissor lifts (1930ES, 2030ES, 2630ES, 2646ES, 3246ES)
JLG error code 773 — CAPACITOR BANK FAULT - CHECK POWER CIRCUITS
Message on the display: CAPACITOR BANK FAULT - CHECK POWER CIRCUITS
Code 773 occurs in machines: JLG ES series, 1932RS, 6RS, 3248RS, 10RS.
blocking fault
Drive, Steer, and Lift Prevented
Description from the JLG 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.
Checks from the manual
- There is an internal or external fault that prevents the System Module’s capacitor bank from charging.
- The System Module detected that the VMN of the pump and traction has not increased more than 1.3V in 1000mS. Alternately, the VMN of the pump or traction is less than 20% of battery voltage.
- If this message persists after disconnecting the drive and pump wiring, there is an internal fault.
- ZAPI - HEALTH (Status LED) - ON
What service does
A qualified service technician reads the code with the manufacturer's diagnostic tools, finds the cause, clears the code and carries out a function test.
Source: JLG Service and Maintenance Manual, ES series (Diagnostic Trouble 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 773 not go away?
RK Rental services JLG 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.