JLG M4069 ANSI Service Manual - Manual (Page 106)

SECTION 5 - JLG CONTROL SYSTEM
5-10 – JLG Lift– 3121122
Table 5-2. Power Module Diagnostic LED Flash Codes
Flash Code Fault
Constant Illumination No Fault, Normal Condition
LED Extinguished Internal Controller Fault
1 Flash Personality Out of Range
2 Flashes Illegal Start Condition or Illegal Steer Switch Input
3 Flashes MOSFET Short Circuit
4 Flashes Contactor Fault or Motor Open Circuit
5 Flashes Not Used
6 Flashes Accelerator, Steer Pot or Speed Probe Wire Default
7 Flashes Low or High Battery Voltage or BDI Cut-Out Operating
8 Flashes Over Temperature
9 Flashes Contactor Coil Short Circuit
12 Flashes CAN Bus Fault