SiUS041829E
Control Specification
Part 4 Functions and Control
49
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.
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.
09/12 class
18 class
Cooling
Heating
Cooling
Heating
A
(Hz)
40
54
48
B
(seconds)
60
70
C
(°C)
10
15
(°F)
50
59
09/12 class
18 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)
Freq
u
ency
C
D
E
B
F
G
H
J
K
A
Summary of Contents for RX09RMVJU9
Page 17: ...SiUS041829E Part 2 Specifications 13 1 Specifications 14 Part 2 Specifications ...
Page 125: ...SiUS041829E Check Part 6 Service Diagnosis 121 18 class R25105 1 2 3 4 Multimeter ...
Page 127: ...SiUS041829E Check Part 6 Service Diagnosis 123 18 class R20704 W V U DC_P1 DC_N1 ...
Page 143: ...SiUS041829E Operation Limit Part 8 Appendix 139 4 Operation Limit RX09 12 18RMVJU9 3D092209E ...
