Table 4-7. Air Conditioner Erratic Operation Troubleshooting.

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

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

Table 4-7. Air Conditioner Erratic Operation Troubleshooting. - continued

TM 55-1905-220-14-8

4-5. GENERAL (Continued).

Table 4-7. Air Conditioner Erratic Operation Troubleshooting.

NOTE

Refer to paragraphs 4-29 and 4-30 for air conditioning and compressor

maintenance instructions.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1. Compressor will not start.

Step 1. Power off.

Check main switch and fuses. Throw in switch or replace blown fuses.

Step 2. Loose electrical connections or faulty wiring.

Tighten connections. Check wiring and rewire, if necessary.

Step 3. Dirty control switch contacts.

Clean contacts on all control switches.

Step 4. Low voltage, relay tripped.

Reset relay. Correct cause of low voltage.

Step 5. High pressure control switch contacts opened.

Find and eliminate cause of high pressure cut-out before restarting. (If provided, press reset

button on dual pressurestat.)

Step 6. Oil safety switch tripped.

Find and eliminate cause of low oil pressure. If provided, press oil switch reset button.)

Step 7. Solenoid thermostat set too high.

Reset.

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