SiEN04-306D
Control Specification
Function and Control
65
3.12 Electronic Expansion Valve Control
Outline
The following items are included in the electronic expansion valve control.
Electronic expansion valve is fully closed
1. Electronic expansion valve is fully closed when turning on the power.
2. Pressure equalizing control
Open Control
1. Electronic expansion valve control when starting operation
2. Control when frequency changed
3. Control for defrosting (only for heat pump model)
4. Control when a discharge pipe temperature is abnormally high
5. Control when the discharge pipe thermistor is disconnected
Feedback Control
1. Discharge pipe temperature control
Detail
The followings are the examples of control which function in each mode by the electronic
expansion valve control.
(R2
833
)
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
F
u
lly clo
s
ed when power i
s
t
u
rned ON
Open control when
s
t
a
rting
(Control of t
a
rget di
s
ch
a
rge pipe temper
a
t
u
re)
Pre
ssu
re e
qua
lizing control
Open control when
s
t
a
rting
(Control of t
a
rget di
s
ch
a
rge pipe temper
a
t
u
re)
(Defro
s
t control FD=1)
Pre
ssu
re e
qua
lizing control
Open control when
s
t
a
rting
Contin
u
e
Pre
ssu
re e
qua
lizing control
Control when fre
qu
ency ch
a
nged
Control f
or
ab
nor
m
a
lly high di
s
ch
a
rge
pipe temper
a
t
u
re
When power i
s
t
u
rned ON
Cooling oper
a
tion
S
top
He
a
ting oper
a
tion
S
top
He
a
ting oper
a
tion
Control of di
s
ch
a
rge pipe
thermi
s
tor di
s
connection
S
top
Oper
a
tion p
a
ttern
(only for he
a
t
p
u
mp model)
(only for he
a
t
p
u
mp model)
: f
u
nction
×
: not f
u
nction
(only for he
a
t p
u
mp model)
Summary of Contents for SiEN04-306D
Page 109: ...Instruction SiEN04 306D 100 System Configuration...
Page 199: ...Outdoor Unit SiEN04 306D 190 Removal Procedure...
Page 203: ...Others SiEN04 306D 194 Others...
Page 214: ...SiEN04 306D Wiring Diagrams Appendix 205 FTKD18 24 28BVMS...
Page 216: ...SiEN04 306D Wiring Diagrams Appendix 207 RKD18 24 28BVMS...
