TM-9-2350-247-20-1 Unit Maintenance Manual Volume 1 M548A1 M548A3 Tracked Cargo Carrier Download
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TM 9-2350-247-20-1 VEHICLE COMPARTMENT HEATER MALFUNCTIONS — Continued 0085 00 4Y 1. Move RUN-OFF-START switch to RUN. Do not stop at OFF position. 2. Does blower and pump stay on? 4YN 1. Replace heater RUN-OFF- START switch. See task: Repair heater control box (WP 0472 00). 2. Verify no faults found. 5Y 1. Check how long heater produce hot air. 2. Does heater continue producing hot air for ten minutes? 5YN 1. Heater shuts off prematurely. See TM 9-2540-205-24&P. 6Y 1. Listen to heater blower. 2. Turn HI-LO switch to HI. 3. Does blower speed increase? 6YN GO TO FY (PAGE 0085 00-9) 7Y 1. Feel heater hot air outlet. 2. Has air temperature increased? 7YN 1. Shut off heater (see your -10). 2. Faulty heater restrictor solenoid. See TM 9-2540-205-24&P. 8Y NOTE Heater shuts off prematurely if air inlet temperature is 60 degrees or above. This is normal. 1. Run heater on HI for ten minutes. 2. Does heater continue producing hot air? 8YN 1. Shut off heater (see your -10). 2. Insufficient heater operation. See TM 9-2540-205-24&P. 9Y 1. Turn RUN-OFF-START switch to OFF. 2. Does blower remain on? 9YN 1. Heater does not purge. See TM 9-2540-205-24&P. 0085 00-2 Change 1