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ARMY TM 9-4120-381-14
NAVY EE-000-CA-MMA-010/7053-AC
AIR FORCE TO 35E9-136-31
4-84. AIR FLOW SWITCH (S8).
This task covers:
a.
Inspection
b.
Testing
c.
Removal
d.
Installation
INITIAL SETUP:
Tools
Tool kit, service, refrigeration unit (Item 1, Appendix B)
Goggles, industrial (Appendix C)
Personnel: 1
Material:
Solder, lead-tin alloy (Item 18, Appendix E)
Flux, solder, liquid rosin base (item 19, Appendix E)
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.
Remove right front evaporator panel (para 4-25).
INSPECTION
1.
Check for missing mounting hardware (see Figure 4-84).
2.
Check that leads are properly connected to terminals.
TESTING
1.
Slide cover (1) off air flow switch (5).
2.
Using multimeter, check continuity between two wired terminal.
· Move flow sensor down - no continuity.
· Move flow sensor up - continuity.
3.
If air flow switch fails test, replace switch.
REMOVAL
1.
Tag, unsolder and disconnect leads.
2.
Remove screw (2), lockwasher (3), and flat washer (4).
3.
Remove air flow switch (5).
4.
Check that air flow sensor arm (6) is not bent or broken.
4-164
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