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Heat
exchanger 1
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7-1. Types of Electronic Thermostatic Expansion Valves
[CHDX07263, CHDX09663]
Capacity
Electronic
control valve
Electronic
control valve 1
Electronic
control valve 2
Electronic
control valve 4
Heat exchanger
1 valve
Heat exchanger
2 valve
For SC circuit
Heat exchanger
1 valve
Heat exchanger
2 valve
For SC circuit
7-2. Power Initialization
If no indoor units have started (even once) after the power was turned ON, the outdoor unit electronic control valve
operates at 480 pulses.
7-3. Heat Exchangers which are controlled by each Electronic Thermostatic Expansion Valve
The configuration of heat exchangers is as shown in the figure below. MOV3 is excluded.
Heat exchanger 2
Operation of Electronic Thermostatic Expansion Valve during normal unit operation
If any one compressor in the outdoor unit is operating, the outdoor heat exchanger coil is used.
In cooling operation, all the inverter compressors are designed to operate, therefore, all the outdoor heat
exchangers in the outdoor units will be used.
SH control controls the difference between the liquid temperature and gas temperature to 2°F ~ 10°F.
During heating mode SH operation in the heat exchanger 2 side, in order to prevent a liquid-back or high load
operation from occurring a control may be implemented so that refrigerant may not flow intentionally to the heat
exchanger.
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W-2WAY ECO-i SYSTEM
Control Functions
7. Outdoor Unit Electronic Thermostatic Expansion Valves
[MOV1, MOV2 & MOV4]