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Dc Inverter VRF plus Water Heater Solution Service Manual CONTROL
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2.2 Control Function of Indoor Unit
1) Cooling Operation
◆
Cooling Capacity
Outdoor unit will determine the compressor capacity output according to the capacity requirements of indoor unit;
Indoor unit will determine the opening of indoor electronic expansion valve by the control of outdoor unit, and the
electronic expansion valve should be set once for every 40 seconds.
◆
Temperature Control
Indoor unit will control the temperature by opening and closing of indoor electronic expansion valve (Shown as the
following figure):
When the indoor unit capacity requirement is 0, you should close the electronic expansion valve;
When the indoor unit of capacity requirement is not 0, you should open the electronic expansion valve
膨胀阀OFF
膨胀阀ON
室内设定温度
+1
-1
室内环境温度
Expansion valve ON
Expansion Valve OFF
Indoor Ambient Temperature
Indoor Setting Temperature