TM 10-4520-262-12&P                                                     0009 00 0009 00-3 Table 1. Operator Troubleshooting Procedures MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION Step 4. Check to make sure that there is no water or other contaminants in the fuel supply. Replace contaminated fuel with new can of clean, uncontaminated fuel. Notify unit maintenance. 3. Battery Charging Light Does Not Come On Step 1.  Remove fuses from battery pack. Visually inspect the element inside the fuse to ensure both fuses are in good condition. If one or more fuse is bad or if in doubt, replace bad fuse(s) with spare fuse(s) located behind duct adapter at heater inlet assembly.   Step 2. Check to make sure that the battery connector is fully inserted. Push the battery pack assembly connector firmly into the connector on the lower housing assembly. Ensure that the locking clips on the connector have fully engaged. Step 3.  Check to ensure that vent openings on combustion air inlet cover or the  combustion exhaust pipe are clear of snow and other obstructions. Clear inlet and exhaust areas of any obstructions Step 4.  Check fuel supply. Is fuel can full of proper fuel for temperature conditions? Refer to WP 0001 00, Table 3. Approved Fuels At Various Temperatures. Verify that fuel being used is appropriate for the temperature in which the heater is operating. Step 5.  Is there a kink or loop in the fuel hose restricting the flow of fuel to the heater? Remove any kinks or loops in the fuel hose and make sure that it lies flat along ground. Ensure that there are no kinks in the hose on the gravity feed adapter. Ensure that all fuel quick disconnect connectors are securely attached. Step 6.  Look through the sediment strainer glass bowl and make sure that sediment strainer is free of water, ice, dirt, or other foreign material. Notify unit maintenance and schedule a servicing of sediment strainer. Step 7. Remove upper housing assembly and verify that the leads going to the thermoelectric generator assembly are securely attached to the modular connector. Ensure that TEG leads are installed in modular connector and that connector screws are secure.