Daikin RX-W Series Service Manual page 88

Control Specification
5.3.2 Four Way Valve Switching
Outline
The four way valve coil is energized/not energized depending on the operation mode.
(Heating: ON, Cooling/Dry/Defrost: OFF)
In order to eliminate the switching sound as the four way valve coil switches from ON to OFF when
the heating is stopped, the OFF delay switch of the four way valve is carried out.
Details OFF delay switch of four way valve
The four way valve coil is energized for 160 seconds after the operation is stopped.
5.3.3 Four Way Valve Operation Compensation
Outline
At the beginning of operation as the four way valve is switched, the pressure difference to activate
the four way valve is acquired when the output frequency is higher than a certain fixed frequency,
for a certain fixed time.
Details
Starting Conditions
1. When the compressor starts and the four way valve switches from OFF to ON
2. When the four way valve switches from ON to OFF during operation
3. When the compressor starts after resetting
4. When the compressor starts after the fault of four way valve switching
The lower limit of frequency keeps A Hz for B seconds for any of the conditions above.
When the outdoor temperature is above C in heating, the frequency decreases depending on the
outdoor temperature.
A (Hz)
B (seconds)
C
5.3.4 3-Minute Standby
Turning on the compressor is prohibited for 3 minutes after turning off.
The function is not used when defrosting.
82
09/12 class
Cooling Heating Cooling Heating
40 54
60
(°C) 10
(°F) 50
15/18/24 class
48
70
15
59
SiUS092230EA
Part 4 Functions and Control