Daikin FTXR-T Series Service Manual page 53

SiUS041829E
3.3.3 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
3.3.4 3-Minute Standby
Turning on the compressor is prohibited for 3 minutes after turning off.
(The function is not used when defrosting.)
3.3.5 Compressor Protection Function
When turning the compressor from OFF to ON, the upper limit of frequency is set as follows. The
function is not activated when defrosting.
A (Hz)
B (Hz)
C (Hz)
D (Hz)
E (Hz)
F (seconds)
G (seconds)
H (seconds)
J (seconds)
K (seconds)
Part 4 Functions and Control
09/12 class
Cooling
40
(°C)
(°F)
(Hz)
Frequency
E
D
C
B
A
F
09/12 class
40
54
72
90
—
180
420
180
120
—
18 class
Heating Cooling
54 48
60 70
10 15
50 59
G H
18 class
52
68
80
—
—
300
200
460
—
—
Control Specification
Heating
J K
(sec.)
Time
(R23251)
49