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W-2WAY ECO-i SYSTEM
Control Functions
10-1. Normal Control
(1) Cooling operation
* The SH target value is controlled so that the difference [E3 - E1] is between 1°C to 3°C, depending on the operat-
ing conditions.
However, a decline in the required level may cause the SH target value to increase. Be aware that in this case, the
electronic control valve closes slightly. This can be easily identified incorrectly as insufficient gas.
(2) Heating operation
(A) Except Types D and GU
* The SC target value is controlled so that the high pressure saturated temp. - E1 becomes between 5°C to
20°C, depending on the operating conditions
(B) Types D and GU
* The SC target value is controlled so that the high pressure saturated temp. - E1 becomes between 5°C to
20°C, depending on the operating conditions.
However, if installation is combined with except Types D and GU, the high pressure saturated temp. - E1 may
be controlled between 5°C to 40°C.
Position of electronic control valve
Outdoor unit operating
Outdoor unit
stopped
Stopped
20
20
Fan
20
20
Thermostat
OFF
20
20
Cooling
Thermostat
ON
Performs SH control in the range of 55 – 480
pulses.
–
Position of electronic control valve
Outdoor unit operating
Outdoor unit
stopped
Stopped
20
20
Fan
20
20
Thermostat
OFF
20
20
Heating
Thermostat
ON
Performs SC distribution control within the range of 55 –
480 pulses.
–
Position of electronic control valve
Outdoor unit operating
Outdoor unit
stopped
Stopped
Liquid refrigerant is gradually returned to the outdoor unit
at pulses ranging from 55 to 80.
85
Fan
Liquid refrigerant is gradually returned to the outdoor unit
at pulses ranging from 55 to 80.
85
Liquid refrigerant is gradually returned to the outdoor unit
at pulses ranging from 55 to 80.
Thermostat
OFF
85
Heating
Thermostat
ON
Performs SC distribution control within the range of 55 –
480 pulses.
–
10. Indoor Unit Control of the Electronic Control Valve
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