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 TM5-4120-384-14
Table
3-1.
OPERATOR
TROUBLESHOOTING-Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step
2.
Check operation of TEMPERATURE SELECTOR.
Set control at maximum COOLER, then, if
condition improves, adjust properly.
Step
3.
Check that supply and
return
air
louvers
are
properly adjusted.
Adjust
louvers
properly.
Check that excessive hot, outside air
is
not
being
Step
4.
introduced through fresh air damper.
Fully close damper,
then,
if
condition
improves,
adjust properly.
Step
5.
Check that all doors, windows, and other
openings
in room or enclosure are tightly closed.
Tightly
close
all
openings.
Step
6.
Check that condenser air inlet guard or discharge
air louver are not obstructed.
Remove
obstruction.
Check
condition
of
refrigerant
in
sight
glass.
Step
7.
If refrigerant color is in the yellow zone or
numerous bubbles appear in window, turn selector
to OFF and contact direct support maintenance.
3. REDUCED HEATING CAPACITY.
See that MODE SELECTOR switch is properly set.
Step
1.
Set switch on LOW or HIGH HEAT.
Check operation of TEMPERATURE SELECTOR switch.
Step
2.
Set control to fully WARMER
then,
if
condition
improves, adjust properly.
3-3
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