TM 9-4120-399-14
Section V. UNIT TROUBLESHOOTING PROCEDURES.
4-16. GENERAL.
a. This section contains troubleshooting information for locating and correcting most
of the operating troubles which may develop in the air conditioner. Each malfunction for
an individual component, unit, or system is followed by a list of tests or inspections which
Y o u should perform the
w i l l help you to determine corrective actions to take.
tests/inspections and corrective actions in the order listed.
b. 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.
c. Table 4-3 lists the common malfunctions which you may find during the operation
o r maintenance of the air conditioner or its components. You should perform the
tests/inspections and corrective actions in the order listed.
WARNING
HIGH VOLTAGE
is used in operation of this equipment.
D E A T H ON CONTACT
may result if personnel fail to observe safety precautions.
Never work on electrical equipment unless there is another person
nearby who is familiar with operation and hazards of equipment and
who is competent in administering first aid. When technician is aided
by operators, he must warn them about dangerous areas.
Whenever possible, input power supply to equipment must be shut off
before beginning work. Take particular care to ground every capacitor
likely to hold a dangerous charge. When working inside, after power
has been turned off, always ground every part before touching it. Be
careful not to contact high voltage connections of 208 volts ac input
when installing or operating this equipment.
Whenever nature of operation permits, keep one hand away from
equipment to reduce hazard to current flowing through vital organs of
Do Not operate equipment without all guards, louvers, and
body.
covers in place and tightly secured.
NOTE
Before you use this table, be sure you have performed all
applicable operating checks.
