Frigidaire FAA055P7AA, Product Information And Technical Manual

Page: 69 / 71

ROOM AIR CONDITIONERS TROUBLESHOOTING
CAUTION: Review Safe Servicing Practices
in
the front of this manual before
attempting diagnostic procedures and repairs.
AIR CONDITIONER VOLTAGE LIMITS
NAMEPLATE
RATING
MINIMUM MAXIMUM
115 VAC 103.5 VAC 126.5 VAC
230 VAC 207 VAC 253 VAC
208/230 197.5 VAC 253 VAC
AIR CONDITIONER VOLTAGE LIMITS
Low voltage is a common cause of trouble in the operation
of any room air conditioner.
Improper voltage may cause one or more of the following
problems:
1. Unit will not start.
2. Compressor motor cycling on motor protector.
3. Premature failure of motor protector.
4. Blown fuses.
5. Premature failure of compressor or fan motor.
6. Noticable dimming of lights when air conditioner is
running.
7. Evaporator icing. Low voltage may reduce fan speed
resulting in inadequate air flow over evaporator, thereby
allowing it to ice up.
Low voltage can also be the direct result of inadequately
wired circuits, extension cords, or loose fuses
and connections to the power supply. Voltage may also
be a general condition in the area (a responsibility of the
power company).
All units will start and run on the minimum voltage stated
in the chart to the left, and will perform satisfactorily if the
voltage remains constant. Low voltage caused by defective
wiring will not remain constant under load.
To test for low voltage, use a reliable meter with sufficient
capacity to measure the required voltage.
Take
measurements at the electric power entry point and at the
electric outlet serving the air conditioner. Take readings
with the unit off, while the unit is starting, and again while
the unit is running. The lowest reading should not drop
below the lowest value listed in the chart.
HIGH VOLTAGE
High voltage can be equally troublesome, causing motors
to overheat, cycle on their protectors, or break
down electrically. This problem can only be solved by the
power company.
ELECTRONIC CONTROL
This control is not repairable. If any component in the
control is defective, the entire control must be replaced.
IMPORTANT NOTICE:
Repair or replace
any malfunctioning line voltage component before
testing or replacing the electronic control.
DO NOT
assume a service problem is directly caused by the
electronic control system. A line voltage component
(including power cord and wiring) that has
opened, shorted, grounded or otherwise
malfunctioned, may have created
a service problem.
SYMPTON POSSIBLE CAUSE
Fan motor will not run. 1. No power.
2. Power supply cord.
3. Selector switch.
4. Energy saving switch (if applicable).
5. Electronic control (if applicable).
6. Wire disconnected or connection loose.
7. Capacitor. (Discharge capacitor before testing.)
8. Defective fan motor windings.
9. Will not rotate. Fan blade hitting shroud or blower
wheel hitting scroll. (Motor cycles on overload.)
Fan motor runs intermittently. 1. Cycle on motor protector.
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