Service Manual Owner's manual

SECTION 8 - DIAGNOSTIC TROUBLE CODES
3121222 – JLG Lift – 8-19
996 POWER MODULE FAILURE -
INTERNAL ERROR
Drive, Steer, & Lift Prevented • The System Module’s analog to digital converter does not
respond for the power PCB. This is an internal failure.
• Cycle machine, if error still exists, replace System Module.
• ZAPI - HEALTH (Status LED) - FLASHING
997 POWER MODULE FAILURE -
CHECK POWER CIRCUITS
OR MOSFET SHORT CIR-
CUIT
The power module detected an error in
the power wiring for the drive or pump.
• Refer to Drive Motor Electrical Evaluation in Section 3.5.
• Refer to Pump Motor Electrical Evaluation in Section 4.8.
• Refer to Power Module Electrical Evaluation in Section 3.6.
998 EEPROM FAILURE - CHECK
ALL SETTINGS
The control system detected an
EEPROM failure.
•Replace ground board.
999 FUNCTION LOCKED OUT -
POWER MODULE SOFT-
WARE VERSION IMPROPER
The power module software version is not
compatible with the rest of the system.
• Replace power module to clear fault.
9910 FUNCTION LOCKED OUT -
PLATFORM MODULE SOFT-
WARE VERSION IMPROPER
The platform board software version is
not compatible with the rest of the system.
• Reprogram platform board.
9911 FUNCTION LOCKED OUT -
LSS MODULE SOFTWARE
VERSION IMPROPER
The load sensing system module soft-
ware version is not compatible with the
rest of the system.
• Replace LSS module to clear fault.
9912 POWER MODULE FAILURE -
SYSTEM MONITOR
The ground board detected armature,
field, or pump current while function was
not commanded.
• Refer to Drive Motor Electrical Evaluation in Section 3.5.
• Refer to Pump Motor Electrical Evaluation in Section 4.8.
• Refer to Power Module Electrical Evaluation in Section 3.6.
9924 FUNCTIONS LOCKED OUT -
MACHINE NOT CONFIG-
URED
The control system's memory indicates
that the vehicle has not been configured
(new control system components).
• Use the JLG analyzer to adjust all machine setup and personality
settings, refer to 5.7 Machine Configuration Programming Infor-
mation.
9950 POWER MODULE FAILURE -
INTERNAL ERROR
Drive, Steer, & Lift Prevented • The System Module’s armature power circuitry is driven without
PWM command for 100mS.
• Cycle machine, if error still exists, replace System Module.
• ZAPI - HEALTH (Status LED) - FLASHING
9951 POWER MODULE FAILURE -
INTERNAL ERROR
Drive, Steer, & Lift Prevented • The System Module’s pump power circuitry is driven without
enable from the interface PCB for 100mS.
• Cycle machine, if error still exists, replace System Module.
• ZAPI - HEALTH (Status LED) - FLASHING
9952 POWER MODULE FAILURE -
INTERNAL ERROR
Drive, Steer, & Lift Prevented • The System Module’s pump power circuitry is driven without
PWM command for 100mS.
• Cycle machine, if error still exists, replace System Module.
• ZAPI - HEALTH (Status LED) - FLASHING
9953 POWER MODULE FAILURE -
INTERNAL ERROR
Drive, Steer, & Lift Prevented • The System Module’s field power circuitry is driven without
enable from the interface PCB for 100mS.
• Cycle machine, if error still exists, replace System Module.
• ZAPI - HEALTH (Status LED) - FLASHING
9954 POWER MODULE FAILURE -
INTERNAL ERROR
Drive, Steer, & Lift Prevented • The System Module’s field power circuitry is driven without
reverse direction from the power PCB for 100mS.
•
Cycle machine, if error still exists, replace System Module.
• ZAPI - HEALTH (Status LED) - FLASHING
9955 POWER MODULE FAILURE -
INTERNAL ERROR
Drive, Steer, & Lift Prevented • The System Module’s field power circuitry is driven without for-
ward selection from the power PCB for 100mS.
• Cycle machine, if error still exists, replace System Module.
• ZAPI - HEALTH (Status LED) - FLASHING
9-9 Hardware
DTC FAULT MESSAGE DESCRIPTION CHECK