CHAPTER 5. DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE INSTRUCTIONS

5-4120-355-14

CHAPTER 5. DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE INSTRUCTIONS

Section 1. Repair Parts, Special Tools, and Equipment

5-1. Special Tools and Equipment.

No special tools and equipment are required to perform direct support and general support maintenance on the

air conditioner.

5-2. Repair Parts

Repair parts are listed and illustrated in the repair parts and special tools list, TM5-4120-355-24P, covering direct

support and general support maintenance parts for the air conditioner.

section 11. Troubleshooting

5-3. General.

This section contains troubleshooting information for locating and correcting most of the operating troubles which

may develop in the air conditioner. Each malfunction for an individual component, unit, or system is followed by a list of

tests or inspections which will help you to determine corrective action to take. You should perform the tests, inspections,

and corrective actions in the order listed.

This manual cannot list all malfunctions that may occur, nor all tests or inspections and corrective actions. If a

malfunction is not listed or is not corrected by listed corrective actions, notify your supervisor.

5-4. Direct Support and General Support Troubleshooting.

Troubleshooting of the air conditioner is given in table 5-1.

Table 5-1. Troubleshooting

MALFUNCTION

TEST OR inspection

CORRECTIVE ACTION

COMPRESSOR WILL NOT START

Step 1. Make sure the main power cable has been connected.

Check main power cable.

Step 2. The power is not connected to the compressor.

Check compressor relay, paragraph 4-32.

Check fuses, paragraph 4-29.

Check circuit breaker, paragraph 4-31.

Step 3. The thermostat is set too high.

Reset thermostat, figure 4-2A.

Step 4. Check for loose electrical connection or faulty wiring.

Tighten connection or rewire if necessary.

Step 5. Check if compressor motor is burned out.

Replace compressor (para 5-13).

5-1