![background image](http://html1.mh-extra.com/html/daikin/ftks50bvmb/ftks50bvmb_service-manual_501473120.webp)
SiEN18-622
Protection Control
Function
107
4. Protection Control
4.1
High Pressure Protection Control
This high pressure protection control is used to prevent the activation of protection devices due
to abnormal increase of high pressure and to protect compressors against the transient
increase of high pressure.
[In cooling operation]
[In heating operation]
Pc>
3
.47MP
a
After 10
s
ec.
Pc>
3
.47MP
a
Pc<
3
.2
3
MP
a
Pc>
3
.64MP
a
Keeping the c
u
rrent
s
tep
After 15
s
ec.
High pre
ssu
re not limited
High pre
ssu
re limited
INV
u
pper limit fre
qu
ency :
1-
s
tep
u
p from c
u
rrent
compre
ss
or fre
qu
ency
Pc: HP pre
ssu
re
s
en
s
or detection v
a
l
u
e
INV
u
pper limit fre
qu
ency :
3
-
s
tep down from c
u
rrent
compre
ss
or fre
qu
ency
When occ
u
rring 10 time
s
within 60
min
u
te
s
, HP
S
i
s a
ctiv
a
ted witho
u
t high
pre
ssu
re
s
t
a
nd
b
y, th
us
o
u
tp
u
tting the
m
a
lf
u
nction code "E
3
".
INV
u
pper limit fre
qu
ency=M
a
x
High pre
ssu
re
s
t
a
nd
b
y
High-pre
ssu
re drop
Pc>
3
.04MP
a
After 10
s
ec.
Pc>
3
.04MP
a
Pc<2.94MP
a
Pc>
3
.64MP
a
Keeping the c
u
rrent
s
tep
After 60
s
ec.
High pre
ssu
re not limited
High pre
ssu
re limited
INV
u
pper limit fre
qu
ency :
1-
s
tep
u
p from c
u
rrent
compre
ss
or fre
qu
ency
Pc: HP pre
ssu
re
s
en
s
or detection v
a
l
u
e
INV
u
pper limit fre
qu
ency :
1-
s
tep down from c
u
rrent
compre
ss
or fre
qu
ency
When occ
u
rring 10 time
s
within 60
min
u
te
s
, HP
S
i
s a
ctiv
a
ted witho
u
t high
pre
ssu
re
s
t
a
nd
b
y, th
us
o
u
tp
u
tting the
m
a
lf
u
nction code "E
3
".
High pre
ssu
re
s
t
a
nd
b
y
Pc<2.
8
9MP
a
Summary of Contents for FTKS50BVMB
Page 1: ...SiEN18 622 E Series Service Manual Applied Models zSuper Multi Plus Cooling Only Heat Pump ...
Page 105: ...Refrigerant Flow for Each Operation Mode SiEN18 622 92 Refrigerant Circuit ...
Page 157: ...Indoor Unit SkyAir Models SiEN18 622 144 Function ...
Page 312: ...SiEN18 622 Ceiling Mounted Cassette Type System Configuration 300 ...
Page 424: ...Method of Replacing The Inverter s Power Transistors Modules SiEN18 622 412 Troubleshooting ...
Page 446: ...Wiring Diagrams SiEN18 622 434 Appendix ...
Page 452: ...SiEN18 622 vi Index ...