– 28 –
9.
APPLIED CONTR
OL AND FUNCTION
9-1.
Indoor Contr
ol Bloc
k Diagram
9-1-1.
When Main (Simple)
Wired Remote Contr
ol Connected
EEPROM
DC5V
EEPROM
HA
CPU
DC5V
DC12V
DC20V
A
B
A
B
A
B
U1
U1
U2
U2
L2
L2
L2
L1
L1
L1
U1 U2
U1 U2
Main (Simple) wired remote control (up to 2 units)
Power
supply
circuit
Function setting
Key switch
Remote control
communication circuit
Display
LCD
Display
LED
Indoor unit
#1
Indoor control P. C. board (MCC-1403)
PMV
Indoor
fan
motor
Power supply circuit
Transformer
Fan motor
relay circuit
External output
In operation
Alarm
Getting ready
Thermostat ON
COOL
HEAT
FAN
AC
synchronization
signal input circuit
BUS
communication
circuit
TA sensor
TC1 sensor
TC2 sensor
TCJ sensor
Driver
Remote
control
communication
circuit
CPU
H8/3039
Indoor/outdoor communication
Outdoor
unit
Power source
208/230-1-60
Outdoor
unit
Outdoor
unit
Power
source
Power
source
#2
#3
Sameas left
Sameas left