TM 9-4120-388-14
5-2. TROUBLESHOOTING TABLE - Continued.
Death or serious Injury could occur under certain conditions by "low voltage." Do
not be misled by this term. Treat "low voltage" with the same caution as "high volt-
age." Be sure that the equipment is unplugged/disconnected and that circuit
breakers are set to OFF. Be sure the equipment ls properly grounded. Always have
another person standing by who is trained in electric shock first aid.
REFRIGERANT UNDER PRESSURE is used in the operation of this equipment.
DEATH or severe injury may result if personnel fail to observe safety precautions
Never use a heating torch on any part that contains refrigerant -22.
Avoid bodily contact with liquid refrigerant and avoid inhaling refrigerant gas
Use great care to avoid contact with liquid refrigerant or refrigerant gas being dis-
charged from any container under pressure. Sudden and irreversible tissue dam-
age can result from freezing.
Wear thermal protective gloves and a face protector or safety glasses in any situa-
tion where skin or eye contact is possible.
Prevent contact of refrigerant gas with flame or hot metal surfaces.
Heat causes the refrigerant to breakdown and form carbonyl chloride (phosgene),
a highly toxic and corrosive gas.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
High voltage can kill.
1. COMPRESSOR WILL NOT START.
Be sure and check Item 1, Step 1 through Step 12, Table 4-2. Troubleshooting for
Unit Maintenance before proceeding with Step 1.
Step 1. Be sure that the LOW and HIGH PRESSURE cutoff switches RESETS are in.
Press the LOW and HIGH PRESSURE switches to RESET. If switches do not remain in, check and/or
replace switches. (See paras 5-15 and 5-16.)
Step 2. Be sure that the compressor motor thermostat is operational. (See para 5-21.)
Replace compressor if thermostat is defective. (See para 5-21.)
Step 3. Inspect and check compressor for burnout. (See para 5-21.)
Replace burned out compressor. (See para 5-21.)
