Mode Selector (Rotary) Switch (S)

TM 5-4120-393-14

4-38.

Mode Selector (Rotary) Switch (S)

This task covers:

c. Testing

a. Removal

d. Replace

b. Inspection

e. Installation

Initial setup.

Tools:

Tool kit, service, refrigeration unit NSN 5180-00-597-1474

Multimeter NSN 662 5-00-553-0142

Personnel:

Equipment condition:

1. Turn unit power off at power source. If there is a chance that it will be turned on, also disconnect power cable to

air conditioner.

2. Remove control panel. See para 4-35.

General Safety Instructions:

WARNING

Disconnect input power to the air conditioner before performing any internal

maintenance. Voltages used can KILL. Shutting the unit off at the control panel

does not disconnect unit power.

REMOVAL

Using allen wrench, loosen setscrews (2) in both knobs (1) and remove knobs (1).

Using screwdriver and wrench, remove four screws (3) and nuts (4) that secure rear panel (5) and pull rear panel

away from box (9) as far as harness will allow.

Using wrench and holding rear of mode selec tor switch (8), remove nut (6) and lock washer (7) from the shaft face.

NOTE

Inspection/Testing (installed) can be done at this point.

Tag and disconnect leads.

Remove switch (8).

4-90