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• When operation start, or during operation, fan speed control by detecting indoor heat exchanger as follows:
8.4.2. Hot start control
• When heating operation start, hot start control carry out.
• During hot start operation, [PREHEAT] displayed at the wired remote controller.
• For wireless remote controller, [POWER LED] is blinking at the receiver of indoor unit. Indoor fan stop and louver angle fixed to
upper side in spite of any setting of remote controller. When indoor heat exchanger temperature increase, or 4 minutes past after
operation start, hot start control finish and shift to normal fan control.
8.4.3. Cold draught prevention control
• This control is to prevent cold draught during heating mode operation.
• The operation will start when the compressor is OFF (thermostat off) during heating operation.
• Initially, the AC indoor fan motor will operate at Lo speed for 2 minutes.
• After this, the AC indoor fan stops for 3 minutes and then operates at Lo speed for 10 seconds. And this operation repeats as
cold draught prevention control is on.
• The cold draught prevention control stops when the compressor is ON (thermostat on).
8.4.4. Heating powerful operation
• When heating mode operation start, temperature differences between setting temperature and room temperature is more than
5 K, setting temperature increase 2 K and operation start.
(however, setting temperature after shifting is more than 31C, setting temperature fixed 31C.)
• Due to this control, micro computer judge indoor heat loss is big and increase compressor frequency compare to normal
condition, then heat up indoor room quickly.
• This control will be finished after 60 min or thermostat is off.
8.4.5. Defrost control
• During heating operation at outdoor low temperature condition, defrost operation start timely to melt the ice formed on outdoor
heat exchanger.
• When heating operation accumulated time is time up, and both outdoor temperature and outdoor unit heat exchanger
temperature is less than setting temperature for 5 minutes. When defrost temperature is more than setting temperature, defrost
operation finish.
• During defrost operation, in spite of any change of remote controller, indoor fan stop.
• During defrost operation, [DEFROST] is displayed at wired remote controller, hot start operate after defrost operation finish.
Fan speed auto
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