Operator Manual User Manual
SECTION 6 - GENERAL SPECIFICATIONS AND OPERATOR MAINTENANCE
6-26 – JLG Lift – 3121221
9-9 Hardware
DTC FAULT MESSAGE DESCRIPTION CHECK
991 LSS WATCHDOG RESET A problem has been detected with the load
sense system.
Refer problem to a qualified JLG mechanic.
992 LSS EEPROM ERROR A problem has been detected with the load
sense system.
Refer problem to a qualified JLG mechanic.
993 LSS INTERNAL ERROR - PIN EXCITATION A problem has been detected with the load
sense system.
Refer problem to a qualified JLG mechanic.
994 LSS INTERNAL ERROR - DRDY MISSING
FROM A/D
A problem has been detected with the load
sense system.
Refer problem to a qualified JLG mechanic.
995 POWER MODULE FAILURE - PERSONAL-
ITY RANGE ERROR
A problem has been detected with the
power module.
Refer problem to a qualified JLG mechanic.
996 POWER MODULE FAILURE - INTERNAL
ERROR
A problem has been detected with the
power module.
Refer problem to a qualified JLG mechanic.
997 POWER MODULE FAILURE - CHECK
POWER CIRCUITS OR MOSFET SHORT
CIRCUIT
A problem has been detected with the
power module.
Refer problem to a qualified JLG mechanic.
998 EEPROM FAILURE - CHECK ALL SET-
TINGS
A problem has been detected with the
ground board.
Refer problem to a qualified JLG mechanic.
999 FUNCTION LOCKED OUT - POWER MOD-
ULE SOFTWARE VERSION IMPROPER
The power module software version is not
compatible with the rest of the system.
Refer problem to a qualified JLG mechanic.