JLG 3246ES Service Manual - Manual (Page 174)

SECTION 6 - DIAGNOSTIC TROUBLE CODES
6-22 – JLG Lift – 3121166
9956 POWER MODULE FAIL-
URE - INTERNAL ERROR
Drive, Steer, & Lift Prevented • The System Module’s field current control or MOS-
FET’s are malfunctioning.
• Cycle machine, if error still exists, replace System
Module.
• ZAPI - HEALTH (Status LED) - FLASHING
9957 POWER MODULE FAIL-
URE - INTERNAL ERROR
Drive, Steer, & Lift Prevented • The System Module’s hardware that generates an
interrupt at 36V and 12V did not respond properly at
power-up.
• Cycle machine, if error still exists, replace System
Module.
• ZAPI - HEALTH (Status LED) - FLASHING
9958 POWER MODULE FAIL-
URE - INTERNAL ERROR
Drive, Steer, & Lift Prevented • The System Module’s pump current measurement or
MOSFET are malfunctioning.
• Pump current measurement >2.74V or <2.26V for
200mS while idle.
• Cycle machine, if error still exists, replace System
Module.
• ZAPI - HEALTH (Status LED) - FLASHING
9960 POWER MODULE FAIL-
URE - INTERNAL ERROR
Drive, Steer, & Lift Prevented • The System Module detected an issue with the trac-
tion current measurement or the MOSFET’s.
• Armature current feedback >2.74V or < 2.26V while
idle
• Cycle machine, if error still exists, replace System
Module.
• ZAPI - HEALTH (Status LED) - FLASHING
9962 POWER MODULE FAIL-
URE - INTERNAL ERROR
Drive, Steer, & Lift Prevented • The System Module’s temperature feedback is >4.9V
or <0.1V.
• Cycle machine, if error still exists, replace System
Module.
• ZAPI - HEALTH (Status LED) - FLASHING
9963 POWER MODULE FAIL-
URE - INTERNAL ERROR
Drive, Steer, & Lift Prevented • The System Module detected a mismatch in the
redundant RAM information stored in the power PCB.
• Cycle machine, if error still exists, replace System
Module.
• ZAPI - HEALTH (Status LED) - ON
9964 POWER MODULE FAIL-
URE - INTERNAL ERROR
Drive, Steer, & Lift Prevented • The System Module’s analog to digital converter does
not respond for the interface PCB.
• Cycle machine, if error still exists, replace System
Module.
• ZAPI - HEALTH (Status LED) - FLASHING
9969 POWER MODULE FAIL-
URE - INTERNAL ERROR
Drive, Steer, & Lift Prevented • The System Module’s MC/EB/EV/DV Enable is always
on. This is internal fault.
• Cycle machine, if error still exists, replace System
Module.
• ZAPI - HEALTH (Status LED) - FLASHING
9-9 Hardware
DTC FAULT MESSAGE DESCRIPTION CHECK