TM 9-4120-398-14
TABLE 5-1. DIRECT SUPPORT TROUBLESHOOTING (cont)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
3.
INSUFFICIENT COOLING ACTION.
Step 1. Check for proper refrigeration charge.
Assure proper charge.
Step 2. Check for dirt-dogged evaporator.
Clean evaporator coil. (See paragraph 5-12.)
Step 3. Check for dirt-clogged condenser coil.
Clean condenser coil. (See paragraph 5-19.)
4.
REFRIGERANT SYSTEM CONTINUOUSLY LOSING REFRIGERANT.
Death or serious injury may result if personnel fail to observe safety precautions. Use great care to
avoid contact with liquid refrigerant or refrigerant gas being discharged under pressure. Sudden and
irreversable tissue damage can result from freezing. Wear thermal protective gloves and a face
protector or goggles in any situation where skin-eye contact is possible.
Prevent contact of refrigerant gas with flame or hot surfaces. Heat causes refrigerant to break down
and form carbonyl chloride (phosgene), a highly poisonous and corrosive gas.
Step 1. Check refrigerant tubing and components for leaks using a leak detector. (See paragraph 5-6.)
Repair or replace as required.
Step 2. Check fusible plug for rupture. (See paragraph 5-22.)
Replace if ruptured.
5-4
