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TM5-4120-376-14
Table 5-1. DIRECT SUPPORT MAINTENANCE TROUBLESHOOTING (Cont)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 2.
a.
b.
Check compressor for damaged valves, bleed off refrigerant to pressures in
accordance with Table 5-2.
Test compressor in accordance with paragraph 5-22, page 5-64.
Replace compressor in accordance with paragraph 5-22, page 5-67.
Table 5-2. NORMAL TEMPERATURE-PRESSURE RELATIONSHIPS
95°F (36°C) dry bulb return air to unit
Outdoor ambient
50F
75F
100F
110F
125F
temperature
10C
24C
38C
4.35C
52C
GAUGE PRESSURES
Suction (psig)
58-65
58-70
60-75
62-72
65-75
(Kg/Cm²,
4.1-4.6
4.1-4.9
4.2-5.3
4.4-5.1
4.6-5.3
Discharge (psig)
120-155
170-205
250-290
300-390
370-410
(Kg/Cm²,
8.4-10.9
11.9-14.4
17.6-20.4
21.1-2.4
26.0-28.8
NOTE
Dry bulb temperatures are measured with an ordinary thermometer.
SECTION III. REFRIGERATION SYSTEM SERVICES
5-6. INSTRUCTION. This section contains all the necessary instructions to perform
refrigeration system services. For your convenience, an index of this section follows.
5-9
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