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ARMY TM 9-4120-381-14
NAVY EE-000- CA-MMA-010/7053-AC
AIR FORCE TO 35E9-136-31
4-50.
RELAY SOCKETS.
This task consists of: Inspection
Removal
Installation
INITIAL SETUP:
Tools
Tool kit, service, refrigeration unit (Item 1, Appendix B)
Personnel: 1
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.
Swing open control box, left and right electric plates (para 4-45).
INSPECTION/TEST
1.
Pull relay from socket (para 4-49 or 4-54).
2.
Check that relay socket and terminals are not cracked, broken, loose, or corroded (see Figure 4-53).
3.
Use multimeter to measure resistance from each socket contact to its associated terminal (see Figure FO-3).
Resistance should be 0.5 ohm or less. Replace socket, if defective.
REMOVAL
1.
Remove relay from socket (para 4-49 or 4-54).
2.
Tag and disconnect leads.
3.
For K7, K18 or K19 socket removal, remove control box brace (para 4-63).
4.
Remove suppression diode (para 4-47).
5.
For K1-K7, K18-K20, remove two screws (1), locknuts (4), flat washers (5), clip (2), and socket (3).
6.
Remove resistor (para 4-55).
7.
For K21 or K22, remove two screws (6), clips (9), locknuts (8), and four flat washers (10) and socket (7).
INSTALLATION
1.
Install K21 or K22 socket (7) with two screws (6), clips (9), four flat washers (10), and two locknuts (8).
2.
Install resistor (para 4-55).
3.
Install K1-K7, K18-K20 socket (3) with two screws (1), flat washers (5), clip (2), and two locknuts (4).
4.
Install suppression diode (para 4-47).
5.
Plug relay into socket (para 4-49 or 4-54).
6.
If sockets K7, K18 or K19 were replaced, install control box brace (para 4-63) as required.
7.
Reconnect leads and remove tags.
4-93
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