JLG 450A_AJ Series II Service Manual User Manual
Page 361
SECTION 6 - JLG CONTROL SYSTEM
3121290
– JLG Lift –
6-51
4/5
(Continued)
MAIN LIFT PVG VALVE STUCK
RETRACTED
Main boom lift pvg valve spool stuck in retracted position.
TOWER LIFT PVG VALVE STUCK
RETRACTED
Tower boom lift pvg valve spool stuck in retracted position.
TOWER TELESCOPE PVG VALVE
STUCK RETRACTED
Tower boom telescope pvg valve spool stuck in retracted position.
MAIN LIFT PVG VALVE
OBSTRUCTED
Main boom lift pvg valve spool could not achieve command.
TOWER LIFT PVG VALVE
OBSTRUCTED
Tower boom lift pvg valve spool could not achieve command.
TOWER TELESCOPE PVG VALVE
OBSTRUCTED
Tower boom telescope pvg valve spool could not achieve com-
mand.
MAIN LIFT PVG VALVE COMMAND
IMPROPER
Main boom lift pvg valve received invalid control system command.
TOWER LIFT PVG VALVE COMMAND
IMPROPER
Tower boom lift pvg valve received invalid control system com-
mand.
TOWER TELESCOPE PVG VALVE
COMMAND IMPROPER
Tower boom telescope pvg valve received invalid control system
command.
MAIN LIFT PVG VALVE TIMEOUT
Main boom lift pvg valve has not received a position command in
250mS.
TOWER TELESCOPE PVG VALVE
TIMEOUT
Tower boom lift pvg valve has not received a position command in
250mS.
TOWER TELESCOPE PVG VALVE
TIMEOUT
Tower boom telescope pvg has not received a position command in
250mS.
MAIN LIFT PVG VALVE SETUP FAULT Main boom lift pvg valve setup data is incorrect. Requires valve cali-
bration.
TOWER LIFT PVG VALVE SETUP
FAULT
Incorrect tower boom lift pvg valve setup data. Requires valve cali-
bration.
TOWER TELESCOPE PVG VALVE
SETUP FAULT
Incorrect tower boom telescope pvg valve setup data. Requires
valve calibration.
MAIN LIFT PVG VALVE SENT UNREC-
OGNIZED FAULT
Main boom lift pvg valve sent unrecognized fault.
TOWER LIFT PVG VALVE SENT
UNRECOGNIZED FAULT
Tower boom lift pvg valve sent an unrecognized fault.
TOWER TELESCOPE PVG VALVE
SENT UNRECOGNIZED FAULT
Tower boom telescope pvg valve sent an unrecognized fault.
MAIN LIFT PVG VALVE PARAME-
TERS INCORRECT
Main lift pvg valves spool data is incorrect. Requires valve calibra-
tion.
TOWER LIFT PVG VALVE PARAME-
TERS INCORRECT
The tower lift pvg valves spool data is incorrect. Requires valve cali-
bration.
TOWER TELESCOPE PVG VALVE
PARAMETERS INCORRECT
The tower telescope pvg valves spool data is incorrect. Requires
valve calibration.
MAIN LIFT PVG VALVE LOCATION
IMPROPER
Main lift pvg valve was hosed wrong or wiring incorrect during cali-
bration.
TOWER LIFT PVG VALVE LOCATION
IMPROPER
Tower lift pvg valve was hosed wrong or wiring incorrect during cali-
bration.
TOWER TELESCOPE PVG VALVE
LOCATION IMPROPER
Tower telescope pvg valve was hosed wrong or wiring incorrect dur-
ing calibration.
Table 6-6. Help Fault Codes, Displayed Faults, and Descriptions
Flash Code
Fault Displayed on Analyzer
Description
Priority