Table 4-7. Air Conditioner Erratic Operation Troubleshooting.

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

TM-55-1905-219-14-8 Landing Craft Utility (LCU) 1667 Class Boston Hull Numbers 1667-1670 NSN 1905-00-168-5764 Manual

Table 4-7. Air Conditioner Erratic Operation Troubleshooting. (CONTINUED)

TM 55-1905-219-14-8

4-5. GENERAL (Continued).

Table 4-7. Air Conditioner Erratic Operation

Troubleshooting.

NOTE

Refer to paragraphs 4-28 and 4-29 for air conditioning and compressor

maintenance instructions.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

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.

4-34