Compressor Protection Function - Daikin FTXS35K2V1B Service Manual

SiBE041213E
3.3.3 Four Way Valve Operation Compensation
Outline At the beginning of the operation as the four way valve is switched, the pressure difference to
activate the four way valve is acquired by having output frequency which is more 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.
A (Hz)
B (seconds)
3.3.4 3-minute Standby
Turning on the compressor is prohibited for 3 minutes after turning it off.
(Except 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 (seconds)
E (seconds)
F (seconds)
Function and Control
35 class
Cooling Heating Cooling
68 66
45
(Hz)
Frequency
C
B
A
D
35 class 42 class
48
64
88
240 150 ~ 240
360
180
42 class 50 class
Heating Cooling
48 54
60
E F
50 class
55 55
70 70
85 85
120
180 200
300 470
Control Specification
Heating
48
70
(sec.)
Time
(R13528)
38