F2
What This Code Means
VAC was NOT measured at Wire N1A; 240 VAC was NOT measured between the N2 lug and terminal 1 of the TR1; F3 fuse blows; SMM Load Shed Module not operating when line voltage is present; Signal on wire 23; Signal on wire 79; Signal on wire 8; Signal on wire 15; Signal on wire 21; Little or no battery voltage present at Terminal Connection 87 (Wire 15) on RL1 socket; Little or no battery voltage present at Terminal Connection 86 (Wire 15A) on RL1 socket; Signal on wire 20; Signal on wire 16; Initial power loss; Engine begins to crank; Unit senses 2-wire start; Starter is activated; Low coolant temperature; Low oil pressure; Low fuel pressure; High coolant temperature; Engine misfiring; Rough idle; No engine activity; Engine will not start; Low coolant level; Ignition system control malfunction; Engine control module receives no crank or cam sensor input; Engine operates at 3600 RPM; Engine operates at 1800 RPM; Signal on wire 17; Signal on wire 18; Signal on wire 12; Signal on wire 13; Si
Possible Causes
- •Faulty or damaged Wire N1A
- •Faulty transfer relay
- •T1 wiring shorted to ground
- •Faulty controller
- •Improper contactor operation
- •Wire 23
- •Wire 79
- •Wire 8
- •Wire 15
- •Wire 21
- •Wire 15 is pinched or cut
- •Wire 15 is prevented from having proper battery voltage
- •Wire 15A is pinched or cut
- •Wire 20
- •Wire 15A is prevented from having proper battery voltage
- •Wire 16
- •Line-to-line voltage drops below 60 percent of operating voltage
- •Voltage not sensed for 15 seconds (for RTS transfer switches)
- •Voltage not sensed at the transfer switch utility sensing board for a pre-determined amount of time (for GTS configured switches)
- •Low signal on Wire 183 at J2 Pin 4
Suggested Actions
- 1Repair or replace Wire N1A
- 2Replace transfer relay
- 3Replace the controller (if DMM indicates infinity during T1 wiring test)
- 4Repair or replace the wiring in the appropriate circuit (if DMM indicates continuity during T1 wiring test)
- 5Verify that Wire 15 is not pinched or cut or in any other way prevented from having proper battery voltage.
- 6Verify that Wire 15A is not pinched or cut or in any other way prevented from having proper battery voltage.
- 7The unit will start a 15-second timer.
- 8If utility voltage is still below 60 percent, the engine will begin the cranking cycle.
- 9The engine will begin to crank.
- 10The start relay closes the contact connecting fused (+) battery voltage to Wire 56.
- 11Fused (+) battery voltage is brought by the Wire 56 to the starter contactor.
- 12The starter contactor closes its contact connecting (+) battery voltage Wire 13 to Wire 16.
- 13Connect WLS
- 14Connect LOS
- 15Connect LFP
- 16Connect HCT
- 17Connect SP_
- 18Connect CYL
- 19Connect ICM
- 20Connect FS
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