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8. CONFIGURATION OF CONTROL CIRCUIT
8-1. Indoor Unit
8-1-1. Indoor Controller Block Diagram
1. Connection of wired remote controller
Max. 8 units are connectable. *1
*1 However in a case that the network adaptor is installed
when 2 remote controllers are connected, maximum
7 units are connectable.
*2 The network adaptor is installed to only one unit.
*3 The weekly timer cannot be connected to the simple wired
remote
controller.
Same
as left
*2
#3
Follower unit
#2
Follower
unit
A
B
L
U1 U2
N
Power
supply
Outdoor
unit
Driver
Indoor control P.C. board
(MCC-1570)
DC12V
DC5V
DC20V
DC
280V
Outside output
CPU
L
N
U1
U2
U1
U2
Power supply
1Ø220-240V, 50Hz
1Ø220V, 60Hz
Indoor/Outdoor
communication
Network adaptor (Option)
Indoor unit
#1
Header unit
Network adaptor
P.C. board (MCC-1401)
DC5V
PMV
Louver
motor
Indoor
fan motor
CPU
DC5V
DC5V
*3
CN2
CN1
Wired remote controller (Up to 2 units)
Schedule timer (in weekly timer mode)
Weekly timer
Function setup
LCD
driver
CPU
Power
circuit
Power
circuit
Power circuit
Transformer
Switch setup
EEPROM
TA sensor
TC1 sensor
TC2 sensor
TCJ sensor
Float input
HA
Outdoor unit
CPU
Fan motor
control circuit
AC synchronous
signal input circuit
Start/Alarm/Ready
Thermostat ON
COOL/HEAT/FAN
CPU
BUS
communication
circuit
Power
circuit
Remote controller
communication circuit
Remote controller
communication circuit
Remote controller
communication circuit
Display
LCD
Display LCD
EEPROM
Display LED
Secondary
battery
Key switch
Function setup
Key switch
Drain
pump
Same
as left
*2
A
B
A
B
L
U1 U2
N
Power
supply
Outdoor
unit
