Section V TROUBLESHOOTING - TM-5-4120-393-140087

TM 5-4120-393-14

Section V TROUBLESHOOTING

4-18. General. This section contains unit troubleshooting information for locating and correcting most of the operating

troubles which may develop in the air conditioner.

4-19. 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. The tests or

inspections and corrective actions are to be performed in the order listed in the table. 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.

NOTE

Before you use the table, be sure you have performed all applicable operating

checks (Table 4-1, item 20).

WARNING

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

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 grilles, guards, louvers, and covers in

place and tightly secured.

Warning: Do not be misled by the term "low voltage." Potentials as low as 50 volts

may cause death under adverse conditions.

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