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 TM5-4120-383-14
Table 5-1.
TROUBLESHOOTING-Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Wear thermal protective gloves and a face
protector or safety glasses in any situation
where skin or eye contact is possible.
Prevent contact of refrigerant gas with flame
or hot metal surfaces.
Heat causes the refrigerant to break down and
form carbonyl chloride (phosgene), a highly
toxic and corrosive gas.
Check head pressure (high pressure side).
Step 4.
(See para 5-19.)
If pressure is too high, check HIGH PRESSURE
a.
(See
cutout switch and replace if defective.
If pressure is excessive and sight glass is
b.
(See para
clear, release excess refrigerant.
Release pressure until requirements of
paragraph 5-19 are met.
Step 5.
Check if LOW PRESSURE cutoff switch RESET is
tripped.
Push and release LOW PRESSURE switch to RESET.
(See para 2-1.)
Step 6.
Check head pressure (low pressure side).
(See para
Add refrigerant if low.
(See para 5-16.)
Step 7.
Check quench valve.
(See para 5-22.)
Replace if defective.
Step 8.
Check compressor motor internal overload switch.
(See para 5-32.)
Replace compressor if motor internal overload
switch is defective.
5-6
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