TM9-4120-400-14
EVAPORATOR FAN SPEED SWITCH S2. - continued
4-23.
REMOVAL
1.
Remove four screws (1) and pull cover (2) off.
Loosen the setscrew (3) in TEMPERATURE SELECTOR knob (4). Remove knob.
2.
Remove the three self-locking screws (5) from the posts (6) and slip the back plate (7) off.
3.
Tag and disconnect wires from EVAPORATOR FAN SPEED switch (8).
4.
Remove nut (9) and washer (10 ) and pull switch (8) from the panel (11).
5.
INSPECTION
Check switch for general condition and loose, broken, or missing terminals.
NOTE
Terminals C1 to C2 and C2 to C3 are not used in single phase units.
TESTING
1. With switch in high position (toward keyway) check continuity between terminals A1 to A2, B1 to B2, and
C1 to C2. Continuity should be indicated across each pair of terminals.
2. With switch in low position (away from keyway) check continuity between terminals A2 to A3, B2 to B3, and
C2 to C3.
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