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84 OUTDOOR UNIT CONTROLS and COMPONENTS
Outdoor Unit Introduction
T
he
outdoor
unit
has
t
w
o
circuit
board
s
,
an Inverter P
o
w
er Module (IPM) that
drives
the
c
ompressor and main control
board (PCB)
that
manages
system
●
functions
and
i
n
verter
calculation
s
.
Sensor
s
moni
t
or
k
e
y
tempe
r
a
t
ures
th
r
oughout
the
s
y
stem
t
o
manage
ope
r
ational
decision
s
.
4-
W
a
y
V
alve
Accumulator
C
ompressor
Def
r
ost
Tempe
r
at
ure
Sensor
Discharge
Tempe
r
at
ure
Sensor
Elect
r
onic
Expansion
V
alve
Refrige
r
ant
Strainers
Ambient
Tempe
r
at
ure
Sensor
F
an
M
o
t
or
P
o
wer
F
ac
t
or
Reac
t
or
S
uction
Line
Tempe
r
at
ure
Sensor
Terminal
Block
M
ain
C
ont
r
ol
Board (PCB)
M
odule
C
ont
r
ol
Board (IPM)
F
an
Blade
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
4
●
6
11
12
13
14
1
3
7
9
10
15
2
8
5
PAGE
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