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SiENBE04-512A
Control Specification
Function and Control
57
3.10 Defrost Control
Outline
Heat Pump Only
Defrosting is carried out by the cooling cycle (reverse cycle). The defrosting time or outdoor
heat exchanger temperature must be more than its fixed value when finishing.
Detail
Conditions for Starting Defrost
The starting conditions must be made with the outdoor air temperature and heat exchanger
temperature. Under the conditions that the system is in heating operation, 6 minutes after the
compressor is started and more than 28 minutes of accumulated time pass since the start of the
operation or ending the defrosting.
Conditions for Canceling Defrost
The judgment must be made with heat exchanger temperature. (4°C~22°C)
ARK(X)S models
(A)RK(X)H, R(Y)N models
Fre
qu
ency
Compre
ss
or
Fo
u
r w
a
y v
a
lve
F
a
n
ON
OFF
ON
OFF
ON
OFF
0Hz
5
s
ec.
3
50pp
s
450pp
s
450pp
s
Initi
a
l opening
PI control
5
s
ec.
50
s
ec.
50
s
ec.
600
s
ec.
60
s
ec.
(R4014)
Electronic exp
a
n
s
ion
v
a
lve opening
Fre
qu
ency
Compre
ss
or
Fo
u
r w
a
y v
a
lve
F
a
n
ON
OFF
ON
OFF
ON
OFF
0Hz
5
s
ec.
450pp
s
450pp
s
450pp
s
Initi
a
l opening
PI control
5
s
ec.
45
s
ec.
55
s
ec.
4
8
0
s
ec.
60
s
ec.
(R4015)
Electronic exp
a
n
s
ion
v
a
lve opening
SiENBE04-512A.book Page 57 Friday, October 5, 2007 1:49 PM
Summary of Contents for FTKS20CVMB(9)
Page 1: ...SiENBE04 512A Service Manual Inverter Pair Wall Mounted Type C Series D Series...
Page 17: ...List of Functions SiENBE04 512A 8 List of Functions...
Page 37: ...Specifications SiENBE04 512A 28 Specifications...
Page 73: ...Control Specification SiENBE04 512A 64 Function and Control...
Page 103: ...Instruction SiENBE04 512A 94 System Configuration...
Page 147: ...Check SiENBE04 512A 138 Service Diagnosis...
Page 225: ...Outdoor Unit RK X H C ARK X H C R Y N C SiENBE04 512A 216 Removal Procedure...
Page 229: ...Others SiENBE04 512A 220 Others...
Page 241: ...Wiring Diagrams SiENBE04 512A 232 Appendix...