Indoor Unit Control Of The Electronic Control Valve - Sanyo CHDXR09663* Service Manual

10. Indoor Unit Control of the Electronic Control Valve

10-1. Normal Control
(1) Cooling operation
Stopped
Fan
Thermostat
OFF
Cooling
Thermostat
ON
* 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.
(2) Heating operation
(A) Except Type D
Stopped
Fan
Thermostat
OFF
Heating
Thermostat
ON
* 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.
(B) Type D
Stopped
Fan
Thermostat
OFF
Heating
Thermostat
ON
* 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.
Position of electronic control valve
Outdoor unit operating
20
20
20
Performs SH control in the range of 55 – 480
pulses.
Position of electronic control valve
Outdoor unit operating
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.
Outdoor unit operating
Performs SC distribution control within the range of 55 –
480 pulses.
Outdoor unit
Position of electronic control valve
20
20
20
1 - 21
W-2WAY ECO-i SYSTEM
Control Functions
stopped
20
20
20
–
Outdoor unit
stopped
85
85
85
–
Outdoor unit
stopped
20
20
20
–
1