TM 55-1510-221-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
the capability of being shut off by
its own control.
a. Eye-ball cold air vents.
b. Pilot's and copilot's air vents
c. Windshield defroster ducts.
d. Main cabin air ducts
*11
Air conditioning and heating sys-
C48-53
tem - Check as follows.
a. Cabin temperature mode selec-
tor switch - MAN COOL or
MAN HEAT.
b.
Manual temperature control
switch - Hold to INCREASE
position for one minute. Ob-
serve an increase in cabin tem-
perature.
c.
Manual temperature control
switch - Hold to DECREASE
position for one minute. Ob-
serve a decrease in cabin tem-
perature.
d.
Cabin temperature mode selec-
tor switch - AUTO.
e.
Cabin temperature control
rheostat - Rotate to full INCR
position Observe an increase
in cabin temperature.
f.
Cabin temperature control
rheostat - Rotate fully counter-
clockwise. Observe an decrease
in cabin temperature.
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