TM 5-6675-319-14
Table 3-4. DIRECT/GENERAL SUPPORT TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
COMPRESSOR RUNS BUT DOES NOT COOL CABINET AND WATER.
C h e c k f o r i n s u f f i c i e n t r e f r i g e r a n t c h a r g e .
Recharge system with freon R-12 refrigerant.
2. COMPRESSOR COOLS EITHER CABINET OR WATER, BUT NOT BOTH.
Step 1.
Check for inoperable solenoid valve as follows:
(a) Remove front cover.
(b) Rotate applicable thermostat adjustment knob back and forth while
l i s t e n i n g f o r s o l e n o i d v a l v e t o c l i c k w h i l e a c t i v a t i n g a n d d e a c t i v a t i n g .
This indicates proper operation of solenoid valve.
( 1 ) I f c l i c k i s h e a r d , p r o c e e d t o s t e p 2 .
( 2 ) I f n o c l i c k i s h e a r d , r e p l a c e d e f e c t i v e s o l e n o i d v a l v e ( p a r a -
graph 3-20.3) and recharge refrigerant.
Step 2.
Check for defective thermostatic expansion valve.
(a) If defective, replace thermostatic expansion valve (paragraph
3-20.2).
( b ) I f m a l f u n c t i o n p e r s i s t s , r e f e r t o e l e c t r i c a l d i a g r a m s .
3. COMPRESSOR DOES NOT OPERATE OR RUNS NOISILY.
Check for defective compressor.
(a) If defective, replace compressor assembly (paragraph 3-20.1).
( b ) I f m a l f u n c t i o n p e r s i s t s , r e f e r t o e l e c t r i c a l d i a g r a m s .
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