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10-1. Normal Control
(1) Cooling operation
Position of electronic control valve
Stopped
Fan
Thermostat
OFF
Thermostat
ON
Cooling
Outdoor unit operating
Outdoor unit
stopped
Performs SH control in the range of 55 – 480
pulses.
* The SH target value is controlled so that the E3 - E1 becomes between 2°F to 6°F, depending on the operating
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.
(A) Except Type D
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(2) Heating operation
Position of electronic control valve
Outdoor unit operating
Stopped
Outdoor unit
stopped
Fan
Heating
Thermostat
OFF
Thermostat
ON
85
85
85
Liquid refrigerant is gradually returned to the outdoor unit
at pulses ranging from 55 to 80.
Liquid refrigerant is gradually returned to the outdoor unit
at pulses ranging from 55 to 80.
Liquid refrigerant is gradually returned to the outdoor unit
at pulses ranging from 55 to 80.
Performs SC distribution control within the range of 55–
480 pulses.
* The SC target value is controlled so that the high pressure saturated temp. - E1 becomes between 10°F to
40°F , depending on the operating conditions.
* The SC target value is controlled so that the high pressure saturated temp. - E1 becomes between 10°F to
40°F, depending on the operating conditions.
However, if installation is combined with except Type D, the high pressure saturated temp. - E1 may be
controlled between 10°F to 80°F.
(B) Type D
Position of electronic control valve
Stopped
Fan
Heating
Thermostat
OFF
Thermostat
ON
Performs SC distribution control within the range of 55 –
480 pulses.
Outdoor unit
stopped
Outdoor unit operating
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W-2WAY ECO-i SYSTEM
Control Functions
10. Indoor Unit Control of the Electronic Control Valve