TM 9-4120-357-14
2-7. Stopping.
CAUTION
Do not disconnect the air conditioner from the power
source immediately after stopping. Liquid refrigerant can
oil, if the crank-case heater is disconnected before the re-
frigerant is completely vaporized. If the air conditioner has
been disconnected, allow up to 12 hours at 0 (-17.8 )
F
C
for vaporization of refrigerant before starting.
To stop the air conditioner from any mode of operation, turn the selector switch to off.
Section II. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)
2-8. General. Preventive Maintenance Checks and Services (PMCS) means systematic caring, inspecting, and serv-
icing of equipment to keep it in good condition and to prevent breakdowns. As the equipment's operator, your mission is
to:
a. Be sure to perform your PMCS each time you operate the equipment. Always do your PMCS in the same
order, so it gets to be a habit. Once you've had some practice, you'll quickly spot anything wrong.
b. Do your BEFORE PMCS just before you operate the equipment. Pay attention to WARNINGs. CAUTIONs,
and NOTEs.
c. Do your DURING PMCS while you operate the equipment. During operation means to monitor the equip-
ment and its related components while it is actually being operated. Pay attention to WARNINGs, CAUTIONs, and
NOTEs.
d. Do your AFTER PMCS right after operating the equipment. Pay attention to WARNINGs, CAUTIONs, and
NOTEs.
e. Do your WEEKLY PMCS once a week.
f.
Do your MONTHLY PMCS once a month.
g. Use DA Form 2404 (Equipment Inspection and Maintenance Worksheet) to record any faults that you dis-
cover before, during or after operation, unless you can fix them. You DO NOT need to record faults that you fix.
2-9. PMCS Procedures.
a. Your Preventive Maintenance Checks and Services lists inspections and care required to keep your equip-
ment in good operating condition. It is set up so you can make your BEFORE operation checks as you walk around the
equipment.
b. The "INTERVAL" column tells you when to do a certain check or service.
c. The "PROCEDURE" column tells you how to do required checks and services. Carefully follow these in-
structions. If you do not have tools, or if the procedure tells you to, notify your supervisor.
2-5