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7. INDOOR UNIT CONTROL
7-1. Indoor Control Circuit
Indoor control P.C. board (MCC-1510)
Display
LED
CPU
EEPROM
TA sensor
Display
LCD
Function setup
Key switch
#1 Header unit
#3
AB
Indoor unit
Main (Sub) master remote controller
Power
circuit
Fan motor
control
circuit
AC
synchronous
signal input
circuit
Serial
send/
receive
circuit
Run
Warning
Ready
Thermo. ON
Cool
Heat
Fan
Outside
output
Driver
Remote
controller
communication
circuit
CPU
H8/3039
Remote
controller
communication
circuit
Buzzer
TC sensor
TCJ sensor
HA
Louver
motor
Indoor
fan
motor
Outdoor unit
123
12
3
Power circuit
DC5V
CPU
LCD
driver
Display
LCD
Function setup
Key switch
Weekly timer
Secondary
battery
DC5V
*
2
CN2 CN1
AB
123
Outdoor
unit
Same as
the left
#2
AB
123
Outdoor
unit
Same as
the left
Max. 8 units are connectable.*1
*1 When group and twin combination.
main remote controller shal be connected
follower indoor unit
*2 Weekly timer is not connectable to the
sub remote controller.
Central control
remote controller
(Sold separatrly)
Power
circuit
Sold separatrly Sold separatrly
DC280V
DC20V
DC12V
DC5V
Wireless
remote
signal
Setting
(A/B)
Driver
Central control
communication
circuit
DC15V
U3
U4
Follower unit
Reciver unit
Display LED
Reciver and Display P.C board
(MCC-819)
(Wired)
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