ARMY TM 9-4120-380-14
AIR FORCE TO 35E9-136-21
a. Request that Unit Maintenance set the thermostat (S2) to desired temperature If the unit has been regulated and
settings are satisfactory. It should not be changed.
b. Check that POWER ON light is on.
Ensure AC power has been on a minimum of 30 minutes for compressor
OFF, then to AUTO position.
Set MODE SELECT switch to COOL.
d. Check that COOL light is on.
e. Check that CIRCULATE light is on.
Check that the following lights are off:
(2) HIGH DISC PRESSURE.
(3) LOW SUC PRESSURE, and
(4) DIRTY FILTER
If any light (except POWER ON, COOL or CIRCULATE) is on, turn MODE
SELECT switch to OFF Contact unit maintenance.
g. Perform "during operation" preventive maintenance checks and services (table 2-1)