TM9-4110-254-14
4-29.
TOGGLE SWITCH S1 TESTING AND REPLACEMENT.
This task covers a. Testing b Removal c. Installation
INITIAL SETUP
Materials/Parts:
General Safety Instructions:
Lock Washers (2)
WARNING
1, Appendix G
Marker tags (2)
7, Appendix E
High voltage and exposed rotating parts are
used in the refrigeration unit. Personal injury
Equipment Conditions:
can result if power is connected.
Refrigeration unit shut down (para 2-7) and power
disconnected.
Control box cover door raised and latched.
a.
Testing. (See Figure 1-4.)
(1) Be sure power has been disconnected at the source and remove two bolts (1) and lock washers (2). Open
control panel (3) Discard lock washers.
(2) Using multimeter set to measure continuity, check toggle switch (4) continuity between terminals 2 to 3 with
toggle switch in both START/RUN and OFF position. Continuity should be indicated only when toggle switch (4)
is in the START/RUN position. If continuity was indicated in the OFF position or if no continuity was indicated m
the START/RUN position, replace toggle switch (4).
(3) If no failure was indicated, close control panel (3). Install two new lock washers (2) and bolts (1).
b.
Removal.
(1) Be sure power has been disconnected at the source and remove two bolts (1) and lock washers (2). Open
control panel (3). Discard lock washers.
NOTE
Terminal and mounting hardware is supplied with toggle switch.
(2) Tag wire leads (5) and remove two screws (6), lock washers (7), and wire leads.
(3) Remove nut (8), lock washer (9), retainer (10), and toggle switch (4).
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