Table 3-2. Organizational Troubleshooting

TM 5-4120-356-14

T a b l e 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

Thermostat improperly set.

S t e p 1.

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

Refrigerant low or contaminated.

Step 2.

Check sight glass. I f r e f r i g e r a n t a p p e a r s y e l l o w r a t h e r

than green, or if bubbles appear in the refrigerant, re-

port the condition to Direct Support Maintenance.

4. NO COOL AIR DISCHARGE

Selector switch set in wrong position.

S t e p 1.

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

Thermostat improperly set.

S t e p 2.

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

Air filter is dirty or clogged.

Step 3.

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

Step 4.

High pressure cut-out switch tripped.

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

Step 5.

Low pressure cut-out switch tripped.

Reset l o w p r e s s u r e c u t - o u t s w i t c h . ( S e e f i g u r e 2 - 2 . )

5. EXCESSIVE COOLING

Thermostat set for too cool operation.

Step 1.

Reset t h e r m o s t a t f o r t e m p e r a t u r e d e s i r e d . ( S e e f i g u r e 2 - 2 . )

3-6