Control Specification
SiUS071735EA
33
Functions and Control
2.3.3 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.
2.3.4 3-Minute Standby
Turning on the compressor is prohibited for 3 minutes after turning it off.
(The function is not activated when defrosting.)
2.3.5 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.)
09/12 class
15/18/24 class
Cooling
Heating
Cooling
Heating
A
(Hz)
40
54
48
B
(seconds)
60
70
C
(°C)
10
15
(°F)
50
59
09/12 class
15/18/24 class
A
(Hz)
40
52
B
(Hz)
54
68
C
(Hz)
72
80
D
(Hz)
90
—
E
(Hz)
—
—
F
(seconds)
180
300
G
(seconds)
420
200
H
(seconds)
180
460
J
(seconds)
120
—
K
(seconds)
—
—
(sec.)
Time
(R23251)
(Hz)
Frequency
C
D
E
B
F
G
H
J
K
A
Summary of Contents for FDMQ-R Series
Page 12: ...SiUS071735EA 1 List of Functions Part 1 List of Functions 1 Functions 2...
Page 14: ...SiUS071735EA 3 Specifications Part 2 Specifications 1 Specifications 4...
Page 120: ...Check SiUS071735EA 109 Service Diagnosis 15 18 24 class R25105 1 2 3 4 Multimeter...
Page 122: ...Check SiUS071735EA 111 Service Diagnosis 15 18 24 class R20704 W V U DC_P1 DC_N1...
Page 140: ...Piping Diagrams SiUS071735EA 129 Appendix RX24RMVJU A 3D092249A...
