TM 9-4120-357-14
CHAPTER 3
OPERATOR MAINTENANCE INSTRUCTIONS
Section I. LUBRICATION INSTRUCTIONS
3-1. General.
The compressor is hermetically sealed, with a charge of oil included. The condenser fan evaporator fan motors incorpo-
rate sealed bearings, so that no lubrication is required. When necessary to relieve binding of grille blades, fasteners,
etc., an application of light machine oil (SAE 10 Lubricating Oil) may be worked into the joint or pivot. Excess oil should
be bottled up with a cloth or paper towel.
Section II. TROUBLESHOOTING
3-2. Use of Table.
a. The troubleshooting table contains information useful in diagnosing and correcting unsatisfactory operation or fail-
ure of the air conditioner.
b. The table lists the common malfunctions which you may find during the operation or maintenance of the air condi-
tioner or its components. You should perform the tests/inspections and corrective actions in the order listed.
c. This manual cannot list all malfunctions that may occur, nor all tests or inspections and corrective actions. If a
malfunction is not listed or is not corrected by listed corrective actions, notify your supervisor.
d. Any trouble or corrective action beyond the scope of operator maintenance shall be reported to unit mainte-
nance.
Table 3-1. Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
WARNING
Hearing protection must be worn when maintenance is
performed while air conditioner is in operation. Failure to
heed this warning can result in hearing loss or injury.
1. AIR CONDITIONER DOES NOT START.
Step 1. Check power supply to be sure it is on.
Turn on power.
Step 2. Verify that circuit breaker is on.
Pull then push circuit breaker reset knob.
3-1
