TM 9-4110-256-14
4-22. INDICATOR DS1 TESTING AND REPLACEMENT.
This task covers:
a. Testing
b. Removal
c. Installation
INITIAL SETUP
General Safety Instructions:
Equipment Conditions:
WARNING
Refrigeration unit shut down (para 2-7) and power
disconnected.
High voltage and exposed rotating parts are used in the
refrigeration unit. Personal injury can result if power is
Control panel cover open.
connected.
Materials/Parts:
Lock Washers (2)
1, Appendix G
Marker Tags (2)
7, Appendix E
a. Testing. (See Figure 1-4.)
(1)
Be sure power has been disconnected at the source and remove indicator cap (1).
(2)
Remove lamp (2).
(3)
Using multimeter set to measure continuity, check lamp (2) continuity between terminals. Continuity
should be indicated. If no continuity was indicated, replace lamp.
(4)
If indicator base (3) is damaged, replace it.
(5)
If no failure was indicated, install lamp (2) and indicator cap (1).
b. Removal.
(1)
Be sure power has been disconnected at the source and remove indicator cap (1) and lamp (2).
(2)
Remove two bolts (4) and lock washers (5). Open control box cover (6). Discard lock washers.
NOTE
Terminal and base mounting hardware is supplied with indicator base.
(3)
Tag wire lead terminals (7) and remove two screws (8) and wire lead terminals.
(4)
Remove nut (9), lock washer (10), and indicator base (3).
c.
Installation.
(1)
Install indicator base (3), lock washer (10), and nut (9).
(2)
Using tags and wiring diagram (fig. 1-4), install wire lead terminals (7) and two screws (8). Remove tags.
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