LOFA
TM
MC704
Panel Operation and Troubleshooting Manual
15
9M02-3000-A001-EN
Revision D
Alternator not charging battery
Possible Cause
Possible Remedy
Broken or slipping alternator drive belt
Adjust or replace alternator drive belt
Alternator not excited
Verify excitation circuit connected; replace faulty regulator; add
additional excitation resistor
Alternator output not connected
Install charge wire
Alternator not grounded
Clean or add ground connection
Alternator faulty
Replace faulty alternator
4.2 Fuel Run/Stop Solenoid Troubleshooting
Engine does not stop immediately
Possible Cause
Possible Remedy
Back feed from motor (i.e., cooling fan)
Add relay or blocking diode
Sticking solenoid linkage
Repair or replace solenoid linkage
Fuel valve without check valve
Install or repair check valve
Fuel run/stop solenoid does not engage
Possible Cause
Possible Remedy
No power to solenoid
Locate reason for lack of power and correct (Circuit overloaded?
Failed suppressor diode? Faulty wiring?)
No power to solenoid pull coil
Correct faulty wiring; check pull control circuit
Incorrect linkage adjustment
Adjust solenoid linkage
Faulty solenoid
Replace solenoid
Failed suppressor diode
Correct wiring (diode reversed?); replace suppressor diode
Optional e-stop engaged
Disengage e-stop
Engine not getting fuel
Possible Cause
Possible Remedy
Empty fuel tank
Fuel engine
Clogged filter
Replace filter
Air in fuel lines
Bleed fuel lines
Low fuel pressure
Replace faulty fuel pump and/or clogged filter
Faulty fuel pump
Replace fuel pump; correct wiring fault (electric fuel pump)
