TM 9-4110-256-14
4-29. REPEAT CYCLE TIMER TM1 TESTING AND REPLACEMENT.
This task covers:
a. Testing
b. Removal
c. Installation
INITIAL SETUP
Materials/Parts:
Equipment Conditions:
Lock Washers (2)
Refrigeration unit shut down (para 2-7) and power
1, Appendix G
disconnected.
Self Locking Nut (2)
8, Appendix G
Control panel cover open.
Tie Down Strap
9, Appendix G
General Safety Instructions:
Marker tags (7)
7, Appendix E
WARNING
High voltage and exposed rotating parts are used in
the refrigeration unit. Personal injury can result if
power is connected.
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 box cover (3). Discard lock washers.
(2)
Remove and discard tie down strap (4).
(3)
Pull repeat cycle timer (5) from relay mounting socket (6).
(4)
Using multimeter set to measure continuity, check repeat cycle timer (5) continuity between terminals
1 to 7. Continuity should be indicated. If no continuity was indicated, replace repeat cycle timer.
(5)
Using multimeter set to measure continuity, check repeat cycle timer (5) continuity between terminals 4 to
7 and 6 to 9. No continuity should be indicated. If continuity was indicated, replace repeat cycle timer.
(6)
If relay mounting socket (6) is damaged, replace it.
(7)
If no failure was indicated, push repeat cycle timer (5) into relay mount socket (6) and install new tie
down strap (4).
(8)
If no failure was indicated, close control box cover (3) and 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 box cover (3). Discard lock washers.
(2)
Remove and discard tie down strap (4).
(3)
Pull repeat cycle timer (5) from relay mounting socket (6).
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