TM 9-4110-258-13
4.19 INDICATORS/LAMPS DS1. DS2. OR DS3 TESTING AND REPLACEMENT.
This task covers:
a. Testing
b. Removal
c. Installation
INITIAL SETUP
Equipment Conditions:
General Safety Instructions:
Refrigeration unit shut down (para 2.7) and power
disconnected.
WARNING
Control box cover door raised and latched.
High voltage and exposed rotating parts are
Materials/Parts:
used in the refrigeration unit. Personal injury
can result if power is connected.
Marker Tags (2)
7, Appendix E
NOTE
The indicators/lamps are identical with the exception of indicator cap color. The following
procedures cover testing and replacement of only one indicator/lamp but are typical for all three.
a.
Testing. (See Figure 1-4.)
(1) Be sure power has been disconnected at the source and remove indicator cap (1) and lamp (2).
(2) Using multimeter set to measure continuity, check lamp (2) continuity between terminals.
Continuity
should be indicated. If no continuity was indicated, replace lamp.
(3) If indicator base (3) is damaged, replace it.
(4) 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 six screws (4). Open control box cover (5).
NOTE
Terminal and base mounting hardware is supplied with indicator base.
(3) Tag wire lead terminals (6) and remove two screws (7) and wire lead terminals.
(4) Remove nut (8), lock washer (9), and indicator base (3).
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