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Operation Section
27
6.12 Fan Mode Control Switch
• The fan motor operation is controlled by relays on the relay board through a microprocessor in
the control panel assembly. The fan program in the microprocessor can be changed by a DIP
switch on the left side of the relay board located in the control box.
• There are two settings:
(1) Cool to stop
• When the DIP switch is set in the downward or STOP position, the microprocessor controls the
fan motor using the same room temperature thermistor that it uses to control the compressor. In
this case, both the fan and the compressor stop when the microprocessor receives a sufficiently
low intake air (room temperature) signal from the thermistor (equal to or less than the set point).
When the temperature increases (exceeds the set point) the microprocessor restarts the fan and
compressor automatically. However, if the unit has been off for less than 120 sec, the fan starts
before the compressor (time delay feature).
(2) Cool to operate
• When the DIP switch is set to the upward or OPERATE position, the microprocessor controls
the fan operation using control panel inputs only. The fan operates continuously during fan only
and cool modes. (This is the factory default setting.)
6.13 Temperature Scale Display Switch
• When the DIP switch is set in the down or “°C” position, the set point and room temperature are
displayed in degrees Celsius. “°C” is indicated on the LCD. When the DIP switch is set in the up
or “°F” position, the set point and room temperature are displayed in degrees Fahrenheit . “°F”
is indicated on the LCD. (This is the factory default setting.)
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