ARMY TM 9-4120-380-14
AIR FORCE TO 35E9-136-21
Section V. UNIT TROUBLESHOOTING
4.15 GENERAL. This section contains unit troubleshooting information for locating and correcting most of the operating
troubles which may develop in the air conditioner.
Before you use the table, be sure you have performed all applicable PMCSs
4.16 TROUBLESHOOTING. Each malfunction for an individual component is listed in table 4-2. The malfunction is
followed by a list of tests or inspections which help to determine probable causes and corrective actions to take. All
malfunctions that may occur and all tests or inspections and corrective actions may not be listed. If a malfunction is not
listed or is not corrected by corrective action, notify your supervisor.
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 equipment must be shut off before beginning work on the equipment.
Take particular care to ground every capacitor 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 equipment to reduce the hazard of
current flowing through vital organs of the body.
Do not operate the equipment without all panels and covers in place and tightly secured. Do not be misled by the
term "low voltage." Potentials as low as 50 volts may cause death under adverse conditions.