Table 3-2. Organizational Troubleshooting

TM 5-4120-339-14

Table 3-2. Organizational Troubleshooting (continued)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

AIR CONDITIONER NOISY DURING OPERATION (continued)

Step 2.

Loose component

Tighten component.

INSUFFICIENT COOLING

Step 1.

Thermostat improperly set.

Set thermostat for cooler operation. (Refer to figure 2-1.)

Step 2.

Refrigerant low or contaminated.

Check sight glass. If refrigerant appears yellow rather than green, or if bubbles

appear in the refrigerant, report the condition to Direct Support Maintenance.

NO COOL AIR DISCHARGE

Step 1.

Selector switch in wrong position.

Set selector switch for cooling. (Refer to figure 2-1.)

Step 2.

Thermostat improperly set.

Set thermostat for desired temperature. (Refer to figure 2-1)

Step 3.

Air filter is dirty or clogged.

Remove and clean air filter. (Refer to paragraph 3-9h.)

Step 4.

High pressure cut-out switch tripped.

Reset high pressure cut-out switch. (Refer to figure 2-2.)

Step 5.

Low pressure cut-out switch tripped.

Reset low pressure cut-out switch. (Refer to figure 2-2.)

EXCESSIVE COOLING

Step 1.

Thermostat set for too cool operation.

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