– 23 –
EEPROM
DC5V
EEPROM
HA
CPU
DC5V
DC12V
DC20V
AB
A
BA
B
U1
U1
U2
U2
L2
L2
L2
L1
L1
L1
U1
U2
U1
U2
Main (
S
imple) wired remote controller (up to 2 unit
s
)
Power
su
pply
circ
u
it
F
u
nction
s
etting
Key
s
witch
Remote controller
comm
u
nic
a
tion circ
u
it
Di
s
pl
a
y
LCD
Di
s
pl
a
y
LED
Indoor unit
#1
Indoor control P. C. board (MCC-140
3
)
PMV
Indoor
f
a
n
motor
Power
su
pply circ
u
it
Tr
a
n
s
former
F
a
n motor
rel
a
y circ
u
it
Extern
a
l o
u
tp
u
t
In oper
a
tion
Al
a
rm
Getting re
a
dy
Thermo
s
t
a
t ON
COOL
HEA
T
FA
N
AC
s
ynchroniz
a
tion
s
ign
a
l inp
u
t circ
u
it
BU
S
comm
u
nic
a
tion
circ
u
it
TA
s
en
s
or
TC1
s
en
s
or
TC2
s
en
s
or
TCJ
s
en
s
or
Driver
Remote
controller
comm
u
nic
a
tion
circ
u
it
CPU
H
8
/
3
0
39
Indoor/o
u
tdoor comm
u
nic
a
tion
O
u
tdoor
u
nit
Power
s
o
u
rce
20
8
/2
3
0-1-60
O
u
tdoor
u
nit
O
u
tdoor
u
nit
Power
s
o
u
rce
Power
s
o
u
rce
#2
#
3
Sa
me
as
left
Sa
me
as
left
Up to
8
u
nit
s
c
a
n
b
e
connected.
8. APPLIED CONTROL AND FUNCTION
8-1. Indoor Controller Block Diagram
8-1-1. When Main (Simple) Wired Remote Controller Connected