Gree JKFD15CR/Na-M, Руководство по обслуживанию

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GREE Air-ccoled Closed Control Unit Service Manual
41
1.2 Introduction to Key Control Logic of the Unit
（
1
）
Control of Indoor Fan
When pressing ON button or timer on is reached, the fan will operate in set time. When the
unit is turned off or timer off is reached, indoor fan will be turned off in 3 minutes. Indoor fan
shall operate earlier than other loads. If the indoor fan has malfunction, the complete unit will
stop.
（
2
）
Control of Compressor
When the unit operates, if ambient temperature is higher than set temperature or ambient
humidity is higher than set value, the startup of the compressor will delay. If ambient
temperature is lower than set value of the system, the compressor will stop operation. Startup
and stop of the compressor shall conform to min operation time and min stop time. Control
system will compare the accumulated operation time of two compressors. The compressor with
less accumulated operation time will start first and the one with longer time will stop first.
（
3
）
Control of Auxiliary Electric Heater
When the unit operates, if ambient temperature is lower than set valve or fluctuation of
temperature or humidity reaches the specified conditions for startup, electric heater will operate.
When ambient temperature is higher than set value or fluctuation of temperature or humidity
reaches the specified conditions for stop, electric heater will stop operation. Control system will
compare the accumulated operation time of two electric heaters. The heater with less
accumulated operation time will start first and the one with longer time will stop first.
（
4
）
Control of Humidifier
When the unit operates, if ambient temperature is within the control range, and the
humidity is lower than set value of the control of the system, the humidifier will be started. When
ambient humidity is higher than set value, humidifier will be turned off. Control system will
compare running current of humidifying and set current. When current of humidifying is lower
than set value, feed valve will be turned on. When current of humidifying is higher than set
value, feed valve will be turned off. Based on calculation of the continous operation time and
stop time of humidifier, control system will clean or discharge the humidifier.