JLG 450A_AJ Series II Service Manual - 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