
Control Specification
SiBE041134EB
46
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 have passed since 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.
RXS20/25K2V1B
RXS20/25K3V1B
RXS20/25L2V1B
ARXS25L2V1B
RXS20/25L3V1B
ARXS25L3V1B
A
(minutes)
28
28
B
(°C)
4 ~ 18
4 ~ 18
C
(Hz)
68
64
D
(Hz)
86
64
E
(seconds)
50
50
F
(seconds)
60
60
G
(seconds)
600
600
H
(seconds)
50
60
J
(pulse)
450
450
K
(pulse)
350 ~ 400
380
L
(pulse)
450
450
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