TM 9-4120-403-14
This task covers:
a. Inspection
c.
Removal
b. Test
d.
Installation
INITIAL SETUP
Tools
Tool Kit, Refrigeration
Equipment Conditions;
Inspection
(1)
Loosen four captive panel fastener screws in junction box cover.
(2)
Remove junction box cover.
(3)
Remove the four nuts and lockwashers that secure the terminal guards.
(4)
Tag and disconnect wire leads.
(5)
Check for loose, corroded, missing, or broken terminal connections.
(6)
Check relay for cracks, evidence of overheating, and other visible damage. Replace if damaged.
Test
(1) Use a multimeter set on the lowest OHMS scale to check continuity between terminals A1 and A2, B1 and
B2, and C1 and C2. All three contacts should be open. If there is continuity, replace the relay.
(2)
Check continuity between coil terminals X1 and X2. If there is not continuity, the coil is open. Replace the
relay.
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