Pressure Switches - TM-5-4120-356-140115

TM 5-4120-356-14

TABLE 4-1.2. pressure. Discharge and Suction Troubleshooting (cont.)

DISCHARGE

SUCTION

LOW

11. Check for plugged or kinked dis-

tributor tube.

12. Check for suction line or evaporator

coil tubing restriction.

13. Ensure dehydrator (filter-drier) is

not clogged.

14. Ensure there is no moisture in

refrigerant system.

WARNING

Disconnect the air conditioner from the electrical power source before at-

tempting to perform maintenance on the pressure switches.

a. High Pressure Cut-Out Switch

(1) Removal (See figure 4-8.)

(2) Test. (See figure 4-9.)

(3) Replace. Replace the high pressure cut-out switch if damage to the switch would impair serviceabil-

ity or if switch fails during test.

(4) Installation.

(a) Refer to figure 4-8 and install the high pressure cut-out switch in the unit.

(b) Perform any further maintenance of refrigeration system components required.

(d) Check the high pressure cut-out switch and the dehydrator for leaks in accordance with paragraph

4-4c. Repair any leaks found.