Table 4-6. Air Conditioner Abnormal Operating Pressures/Temperatures - Troubleshooting.

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Table 4-5. Lube Oil Transfer Hand Pump- - Troubleshooting. - continued

TM-55-1905-220-14-8 Landing Craft Utility LCU 1671-1679 NSN 1905-01-009-1056 Manual

Table 4-6. Air Conditioner Abnormal Operating Pressures/Temperatures - Troubleshooting. - continued

TM 55-1905-220-14-8

4-5. GENERAL (Continued).

Table 4-6. Air Conditioner Abnormal Operating Pressures/Temperatures - Troubleshooting.

NOTE

Refer to paragraph 4-29 for air conditioning system maintenance instructions.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1. High head pressure.

Step 1. Air or noncondensable gas in system.

Purge through condenser purge valve.

Step 2. Condenser water inlet temperature too high.

Increase water flow by adjusting water regulating valve.

Step 3. Insufficient water flow through condenser:

a. Obstruction in water supply line, dirty strainer or partially closed stop valve.

b. Low water main supply pressure.

c. Water regulating valve set to open at too high head pressure.

Increase water flow through condenser:

a. Remove obstruction, clean strainer or open stop valve.

b. Restore pressure.

c. Adjust water regulating valve to maintain a discharge pressure of 90 to

125 psig (620.6 to 861.9 kPa).

Step 4. Condenser tubes clogged or water baffles corroded.

Clean tubes. Replace tubes or water heads, if necessary.

4-29