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Page Title:
COMPRESSOR SHORT CYCLES. (Cont) |
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 TM5-4120-384-14
TROUBLESHOOTING-Continued
Table
5-1.
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.
Step
4.
Check head pressure
(high
pressure
side).
(See para 5-19.)
a.
If pressure is too high, check HIGH PRESSURE
(See
cutout switch and replace if defective.
b.
If pressure is excessive and sight glass is
(See para 5-
clear, release excess refrigerant.
11.)
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 2-2.)
Step
6.
Check head
pressure
(low
pressure
side).
(See
Add
refrigerant
if
low.
(See
(See
Step
7.
Check quench valve.
Replace
if
defective.
Check compressor
motor
internal
overload
switch.
Step
8.
(See para 5-33.)
Replace compressor
if
internal
overload
switch
is defective.
5-6
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