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ARMY TM 9-4120-381-14
NAVY EE-000- CA-MMA-010/7053-AC
AIR FORCE TO 35E9-136-31
4-45.
CONTROL BOX AND COMPONENTS.
This task consists of: Inspection
Testing
Repair
Replacement
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.
Open right front evaporator panel (para 4-25).
3.
Remove center front evaporator panel (para 4-22).
NOTE
Access can be made to components located on right electric plate without removing right front evaporator
panel.
4.
Open left electric plate (para 4-30).
5.
Open right electric plate (para 4-31).
6.
Remove two screws (1) (see Figure 4-48).
7.
Swing open control box (2).
INSPECTION TESTING AND REPLACEMENT
NOTE
Applicable inspection, testing, repair, and replacement of the control box components and control box is
covered in the following referenced paragraphs.
1.
Control Box.
a.
Rectifier CR1 (para 4-46).
b.
Suppression diodes' CR2-CR11 (para 4-47).
c.
Control relays K1-K7, K18-K20 (para 4-49).
d.
Relay sockets (11-pin) (para 4-50).
e.
Fan contactors K8 and K9 (para 4-51).
f.
Compressor contactor K10 (para 4-52).
g.
Heater contactor K11 (para 4-53).
h.
Time delay (10 and 60 sec) relays K21 and K22 (para 4-54).
i.
Resistors R1 and R2 (para 4-55).
j.
Transformer T1 (para 4-60).
k.
Terminal boards TB1-TB3 (para 4-61).
I.
Control box (para 4-63).
4-83
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