AIR CONDITIONER

TM 9-2320-289-34 Table 2-1. Mechanical Troubleshooting MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION AIR CONDITIONER 1. COOLING INSUFFICIENT Step 1. Step 2. Step 3. Step 4. Step 5. Test air conditioning system, (See paragraph 10-20) If leaks are found, tighten loose fittings and replace any damaged components. Start engine. Check air conditioner belt for slipping. If air conditioner belt is still slipping, repair compressor. (See paragraph 10-24) Start engine. Inspect compressor clutch for slipping. If compressor clutch is slipping, shut off engine and check gap between compressor clutch plate and compressor pulley. Gap should be 0.022-0.057 in. (0,560-1 .450 mm). If gap is not within specifications, disassemble compressor and check for mispositioned shaft or key. (See paragraph 10-24) Check clutch coil housing for improper installation or damage. (See paragraph 10-24) Reposition or replace clutch coil housing if necessary. Remove air conditioner inlet grille. Inspect condenser coils and air conditioner inlet grille for air blockage due to buildup of foreign material. Clear air blockage. CAUTION DO NOT oporate air conditioner for extended periods with condenser cover assembly removed. Failure to follow this caution may result In damage to air conditioning system due to high head pressure. Step 6. Remove condenser cover assembly. (See TM 9-2320-289-20) Operate air conditioning system. Feel condenser coil bends. Bends at equal elevation should be about the same temperature. If bends have significantly different temperatures, cooler bend has a restriction, Replace condenser if there are any restrictions. (See paragraph 10-26) 2-10