TM 9-4120-388-14
Section V. TROUBLESHOOTING
4-16. GENERAL
This section contains troubleshooting information for locating and correcting most of the operating troubles
a.
which may develop in the air conditioner unit. Each malfunction for an individual component, unit, or system
is followed by a list of tests or inspections which will help you to determine corrective actions to take. You should
perform 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 corrected by listed corrective actions, notify your supervisor.
Table 4-2 Iist the common malfunctions which you may find during the operation or maintenance of the air condi-
c.
tioner unit or its components. You should perform the test/inspections and corrective actions in the order listed.
HIGH VOLTAGE
is used in the operation of this equipment.
DEATH 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 the operation and hazards of the equipment and who is competent
in administering first aid. When the technician Is aided by operators, he must warn
them about dangerous areas.
Whenever possible, the Input power supply to the equipment must be shut off be-
fore beginning work on the equipment. Take particular care to ground every ca-
pacitor likely to hold a dangerous potential. When working inside the equipment,
after the 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 the nature of the operation permits, keep one hand away from the equip
ment to reduce the hazard of current flowing through vital organs of the body.
Do not operate the equipment without all grilles, guards louvers, and covers in
place and tightly secured.
Death or serious injury could occur under certain conditions by "low voltage." Do
not be mislead by this term. Treat "low voltage" with the same caution as "high
voltage." Be sure that the equipment Is unplugged/dlsconnected and that circuit
breakers are set to OFF. Be sure the equipment is properly grounded. Always have
another person standing by who is trained In electric shock first aid.
NOTE
Before you use this table, be sure you have performed all applicable operating checks.
