Protection Control
SiENBE18-621
74
Function
4.2
Low Pressure Protection Control
This low pressure protection control is used to protect compressors against the transient
decrease of low pressure.
[In cooling operation]
[In heating operation]
Pe<0.25MP
a
3
6Hz Unlo
a
d
Pe>0.
3
9MP
a
Pe<0.07MP
a
Low pre
ssu
re not limited
Pe: LP pre
ssu
re
s
en
s
or detection
v
a
l
u
e
Pe<0.15MP
a
Pe>0.
3
0MP
a
Hot g
as
S
VP = OFF
Hot g
as
S
VP = ON
Low pre
ssu
re
limited
When occ
u
rring
3
time
s
within
3
0 min., the
m
a
lf
u
nction code "E4" i
s
o
u
tp
u
t.
Low pre
ssu
re
s
t
a
nd
b
y
&
• T
s
-Teg<
8
deg
• Pe>0.06MP
a
• Pe>0.09MP
a
or
After 10
s
ec.
Pe<0.17MP
a
Pe<0.17MP
a
Pe>0.20MP
a
Pe< 0.07MP
a
C
u
rrent
s
tep limited
After 15
s
ec.
Low pre
ssu
re not limited
Low pre
ssu
re limited
Pe<0.12MP
a
Pe>0.17MP
a
Hot g
as
S
VP = OFF
Hot g
as
S
VP = ON
Pe: LP 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
INV
u
pper limit fre
qu
ency :
1-
s
tep
u
p from c
u
rrent
compre
ss
or fre
qu
ency
When occ
u
rring
3
time
s
within
3
0 min.,
the m
a
lf
u
nction code "E4" i
s
o
u
tp
u
t.
Low pre
ssu
re
s
t
a
nd
b
y
Summary of Contents for BPMKS967B2B
Page 1: ...SiENBE18 621 E Series Service Manual Applied Models Super Multi Plus Heat Pump...
Page 12: ...SiENBE18 621 List of Functions 1 Part 1 List of Functions 1 List of Functions 2...
Page 19: ...List of Functions SiENBE18 621 8 List of Functions...
Page 33: ...Specifications SiENBE18 621 22 Specifications...
Page 69: ...Refrigerant Flow for Each Operation Mode SiENBE18 621 58 Refrigerant Circuit...
Page 121: ...Indoor Unit SkyAir Models SiENBE18 621 110 Function...
Page 169: ...Instruction SiENBE18 621 158 System Configuration FTXS 20 25 35C Indoor Unit...
Page 371: ...Method of Replacing The Inverter s Power Transistors Modules SiENBE18 621 360 Troubleshooting...
Page 393: ...SiENBE18 621 vi Index...
