TM 9-2350-247-10TROUBLESHOOTING TABLE—Continued 0056 00INITIAL SETUP:Maintenance LevelOperatorENGINE COOLANT HEATER KITTable 6. Troubleshooting Procedures.MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTION1. COOLANT HEATER DOES NOTSTART WITH RUN-OFF-STARTSWITCH HELD IN STARTPOSITION.1. Check if MASTER SWITCH isOFF.Turn MASTER SWITCH ON.2. Defective heater.Notify unit maintenance.2. COOLANT HEATEROVERHEATS.1. Check if one or both coolantshutoff valves are closed.Open coolant shutoff valves(WP 0040 00), (WP 0041 00).3. COOLANT HEATER OUTPUTIS TOO LOW.1. Check if the HI-LO switch is inLO position.Move HI-LO switch to HI position(WP 0040 00), (WP 0041 00).4. BATTERIES OVERHEAT.1. Air temperature is too warm toneed the engine coolant heater.Turn off engine coolant heater(WP 0040 00), (WP 0041 00). You donot need to use heater if temperature isabove -25F (-32C).2. Engine and engine coolant heaterare both running.Turn off engine coolant heater(WP 0040 00), (WP 0041 00) as soonas the engine starts.0056 00-13/14 blank
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