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TM 9-4120-389-14
WARNING
Voltages used can kill. Always disconnect power cord to air conditioner before
performing any internal maintenance. Shutting unit off at its control module does
not disconnect unit power.
Preliminary procedure: Remove top cover (See para. 4-14).
NOTE
The compressor and motor assembly are hermetically sealed in a metal canister
and are not repairable. The crankcase heater may be replaced without opening
the refrigerant system.
a.
Crankcase heater
(1)
Inspection
(a)
Check heater wire leads for burns or damage. Replace if damaged.
(b)
Check for loose push-on connection. Tighten as needed.
(c)
Check for cut or broken wire leads.
(d)
Replace heater with damaged leads.
(2)
Test
(a)
Tag and disconnect leads B1-1 and B1-2 at push-on connection.
(b)
Check continuity of heater wires.
(c)
Replace open heater.
(3)
Removal
(a)
Cut ties as needed and remove thermal mastic from heater.
(b)
Remove spring clip that secures heater in receptacle.
(c)
Remove crankcase heater from receptacle.
(4)
Installation
(a)
See table 4-3 (wire list) for terminal connection information.
(b)
See para. 4-36 for general wire repair instructions.
5-64
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