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6. CONTROL BLOCK DIAGRAM
6-1. Indoor Controller Block Diagram
6-1-1. In Case of Connection of Wired (Simple) Remote Controller
Indoor unit
#1 (Heder)
Indoor control P.C. board (MCC-1720)
Drain
pump
Indoor
fan motor
Power circuit
DC280V
∗ "1:1 model" connection interface
U3
Central remote
controller(Option)
U4
Wired (Simple) heder remote controller (Max. 2 units)
Display LCD
MCU
Display LED
Remote controller
communication circuit
A
B
DC20V
Remote controller
communication circuit
DC5V
DC12V
Driver
External
output
MCU
Run
Alarm
Defrost
Thermo. ON
COOL
Fan motor
HEAT
control circuit
FAN
(Option)
P.C. board
(MCC-1440)
TCC-LINK
communication circuit
Function setup
Display LCD
Key switch
CN2
CN1
DC5V
Power circuit
∗3
EEPROM2
EEPROM1
TA sensor
TC sensor
MCU
TCJ sensor
Float input
HA
Serial send/
receive circuit
AC
synchronous
signal input circuit
1
2
3
∗1 Up to 16 units (TU2C-Link) or 8 units (TCC-Link)
can be connected.
1
2
3
∗2 The "1:1 model" connection interface is mounted
to only 1 unit. "1:1 model"connection interface is
mounted to the header unit.
Outdoor unit
- 23 -
Schedule remote controller
LCD driver
Function setup
MCU
Key switch
DC5V
Power
Secondary
circuit
battery
#2
#3
(Follower)
(Follower)
A
B
A
Same as left
Same as left
∗2
∗2
1
2
3
1
Outdoor unit
Outdoor unit
B
2
3
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