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 TM 55-1905-223-24-17
Table 2-2. Troubleshooting - CONT
Malfunction
Test or Inspection
Corrective Action
AIR CONDITIONING - CONT
a.
Check points in breaker. Clean dirt or oil from points with soft rag or soft brush.
b.
Replace circuit breaker if contacts are burned or pitted (TM 55-1905-223-24-18).
STEP 3.
Check to see if compressor motor is defective.
Replace compressor if "short" or "open" in windings (paragraph 2-15).
17.
Compressor short cycles on high pressure cut-out.
STEP 1.
Check water pressure (if it drops below 150 psig) through condenser or clogged condenser.
a.
Adjust water regulating valve (A/C-2; accommodations) to 210 psig (discharge/head
pressure).
b.
Make sure all water line valves are fully open (TM 55-1905-223-10).
c.
Check for clogged sea strainer (TM 55-1905-223-24-18).
d.
Make sure seawater pump is operating properly (TM 55-1905-223-24-18).
STEP 2.
Check to see if compressor discharge stop service valve is partially closed (A/C-2;
accommodations).
Turn valve fully (counterclockwise).
STEP 3.
Check to see if seawater inlet temperature to condenser is warm (above 900F). System is
designed for maximum of 90 F inlet water temperature.
Ensure water intake line is clear of hot water discharge or other external sources of heat.
18.
Compressor short cycles on low pressure cut-out. Recharge system with R-22 (Item 12, Table 2-2).
STEP 1.
Check to see if suction stop (service) valve is partially closed (A/C-2; accommodations).
Open valve fully counterclockwise.
19.
Compressor runs continuously.
STEP 1.
Check to see if control contacts are fused together.
Locate control and replace as required.
2-25
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