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ARMY TM 9-4120-381-14
NAVY EE-000- CA-MMA-010/7053-AC
AIR FORCE TO 35E9-136-31
4-49.
CONTROL RELAYS ( K1-K7, K18-K20).
This task consists of:
Removal
Inspection
Testing
Installation
INITIAL SETUP:
Tools
Tool kit, service, refrigeration unit (Item 1, Appendix B)
Personnel: 1
Materials:
Varnish, moisture and fungus resistant (Item 16, Appendix E)
Equipment Conditions:
WARNING
Disconnect input power to the air conditioner before performing any internal maintenance. Voltages
used can KILL. Shutting the unit off at the control panel does not disconnect unit power.
1.
Disconnect air conditioner input power at source.
2.
Open left electric plate (para 4-30).
3.
Open right electric plate (para 4-31).
REMOVAL
1.
Slip wire retaining clip (1) off relay (2) (see Figure 4-52).
2.
Pull relay (2) from 11-pin socket (3).
INSPECTION
1.
Check for loose, corroded, missing or broken pins.
2.
Check relay for cracks, signs of overheating and other visible damage. Replace relay, if damaged.
TESTING
Use multimeter to check continuity between following pins. If relay condition is not correct, replace relay.
PINS
CLOSED
OPEN
1-4
x
5-6
x
2-10
500 ± 50 ohms
1-3
x
6-7
x
8-11
x
9-11
x
INSTALLATION
1.
Fungus proof replacement relay per MIL-V-173.
2.
Plug relay (2) into 11-Pin socket (3).
3.
Secure with wire retaining clip (1).
4-91
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