TM 10-4520-262-12&P                                                     0009 00 0009 00-4 Table 1. Operator Troubleshooting Procedures MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 4. Battery Charged Light Does Not Come On Step 1. Is the heater operating in extremely cold conditions? Did the battery pack possibly have a low charge before operation? Wait for a longer period of time for the battery to charge. Battery should be fully charged within 60 minutes of heater operation. Step 2. Has there been more than one startup attempt in cold weather? If there has been more than one startup attempt in cold weather, the batttery may be severely depleted and may require up to 2 hours to recharge. Step 3.  Is fuel can full of proper fuel type 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 4.  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 engaged. If the battery charged light does not go out after applying the above actions, notify unit maintenance. The troubleshooting procedures that follow refer to the system fault advisory light on the in-tent controller. In the event of a system fault, this light will flash from one to ten times accompanied by the same number of audible tones. Take note of the number of flashes/tones and refer to the fault code listing below to troubleshoot the specific condition. 5. Fault Code 1 – Battery Low Voltage Step 1.  This fault condition is caused by the battery having less than the required voltage to start or operate the heater.   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 you are in doubt, replace bad fuse(s) with spare fuse(s) located behind duct adapter at heater inlet assembly. If condition persists, notify unit maintenance.