Control Specification
SiBE05-722EE
50
Functions and Control
3.10 Defrost Control
Outline
Defrosting is carried out by the cooling cycle (reverse cycle). The defrosting time or outdoor
heat exchanger temperature must be more than a certain value to finish defrosting.
Detail
Conditions for Starting Defrost
The starting conditions are determined with the outdoor temperature and the outdoor heat
exchanger temperature.
The system is in heating operation.
The compressor operates for 6 minutes.
More than
A
minutes of accumulated time pass after the start of the operation, or ending the
previous defrosting.
Conditions for Canceling Defrost
The judgment is made with the outdoor heat exchanger temperature. (
B
°C)
: The same value continues.
Frequency
Compressor
Four way valve
Fan
ON
OFF
ON
OFF
ON
OFF
0 Hz
0 Hz
C
Hz
D
Hz
5 sec.
PI control
5 sec.
H
sec.
(R22034)
E
sec.
F
sec.
G
sec.
K
pulse zone
Electronic
expansion valve
opening
Normal
control
J
pulse
zone
L
pulse
zone
Starting
control
RXS25/35E2V1B
RXS25/35G2V1B
RXS25/35G2V1B9
RXS25/35J2V1B
RXS25K3V1B
RXS25L2V1B
RXS35K2V1B
RXS35L2V1B
RXS25/35L3V1B
A
(minutes)
28
28
28
28
28
B
(°C)
4 ~ 18
4 ~ 18
4 ~ 18
4 ~ 18
4 ~ 18
C
(Hz)
74
76
68
76
64
D
(Hz)
86
86
86
86
64
E
(seconds)
50
50
50
50
50
F
(seconds)
60
60
60
60
60
G
(seconds)
600
600
600
600
600
H
(seconds)
50
60
50
60
60
J
(pulse)
450
450
450
450
450
K
(pulse)
350
350
350 ~ 400
200 ~ 300
380
L
(pulse)
450
450
450
450
450