Daikin FTX09NMVJU, Service Manual

Page: 55 / 145

SiUS091601E Control Specification
Functions and Control 44
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.
Detail 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 with any conditions 1 through 4 above.
When the outdoor temperature is above C
°
C in heating, the frequency decreases depending on
the outdoor temperature.
3.3.4 3-Minute Standby
Turning on the compressor is prohibited for 3 minutes after turning it off.
(The function is not activated 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.)
: Values refer to 15 class only, when outside temperature is lower than -15°C (5°F)
09 class 12 class 15 class
Cooling Heating Cooling Heating Cooling Heating
A (Hz) 40 54 24 34 48
B (seconds) 60 60 70
C
(°C) 10 10 15
(°F) 50 50 59
09 class 12 class 15 class 15 class
A (Hz) 40 24 52 35
B (Hz) 54 34 68 52
C (Hz) 72 44 80 62
D (Hz) 90 56 98 80
E (Hz) 100 78 — 100
F (seconds) 180 180 300 1300
G (seconds) 420 420 200 250
H (seconds) 180 180 460 300
J (seconds) 120 120 200 200
K (seconds) 400 180 — 120
(sec.)
Time
(R23251)
(Hz)
Frequency
C
D
E
B
F G H J K
A