Table 3-3. SWITCH FUNCTIONS

TM 5-4120-364-13

and

disconnect

eletrical

leads

from

selector

switch

(18)

and

remove jumper (19).

then remove selector switch (18).

( d ) Remove screws (13), washers (3),

( 2 ) Inspection.

( a ) Check selector switch for freedom of retation by rotating the kncb

3 6 0 degrees.

( b ) Check continuity through selector switch with a circuit tester,

If selector switch is found to be defective, it must be replaced. Refer to Table 3-3.

TABLE 3-3.

SWITCH FUNCTIONS

SWITCH

POSITION

FUNCTION

WAFER 1

WAFER 2

WAFER 3

OFF

4 AND 5

VENT

4 5 AND 6

COOL

5 AND 6

7 AND 8

EXT CONTROL

4 AND 6

9 AND 10

(3) Installation,

( a ) Position selector switch (18) on back of control panel (16) and

secure with screw (13) and washers (3).

(b) Connect electrical leads and jumper to selector switch terminals.

(22) by turning fasteners one-quarter turn clockwise.

( d ) Place control knob on selector switch shaft and secure with set-

screw.

d. Temperature Control. Access to the temperature control is gained by re-

m o v i n g knob (24, figure 3-10) f r o m shaft of temperature control (27) and turning

fasteners (22) one-quarter turn counterclockwise and removing control panel (16).

(1) Removal.

(a) Tag and disconnect electrical leads from temperature control (27).

( b ) Loosen screws holding thermostat bulb t o the evaporator coil frame

b r a c k e t and slide bulb out. Push t u b i n g and bulb through bulkhead.

Change 1

3-20