7-1. Indoor Controller Block Diagram
7-1-1. Connection of Wired (Simple) Remote Controller
Schedule timerWired (simple) master remote controller (Max. 2 units)
P.C. board
(WP-035)
Signal receiving unit for wireless remote controller (Option)
Outdoor unit
Outdoor unit
321
321
321
Up to 8 units are connectable. ∗1
∗1 However Max.8 units are connectable in
case of mounting “1:1 model” connection interface
when two wired (simple) remote controllers are
connected.
∗2 The “1:1 model” connection interface is mounted
to only 1 unit.
“1:1 model” connection interface is mounted
to the header unit.
∗3 Connection of the schedule timer to the simple
remote controller is unavailable.
Same as left
∗2
#3
(Follower)
A B
AB
Same as left
∗2
#2
(Follower)
A B
DC5V
DC5V
Indoor unit
#1 (Header)
Indoor control P.C. board (MCC-1643)
Louver
motor
Drain
pump
Indoor
fan motor
CPU
Driver
DC12V
DC5V
DC20V
Outside
output
Remote controller
communication circuit
Display LCD Function setup
Key switch
CN2
CN1
∗3
CPU
Display LED
Display LCD LCD driver
CPU
Remote controller
communication circuit
Function setup
Key switch
Power circuit
Power circuit
DC280V
Fan motor
control circuit
EEPROM
TA sensor
TC sensor
TCJ sensor
Float input
HA
Run
Warning
Defrost
Thermo. ON
COOL
HEAT
FAN
Serial send/
receive circuit
AC
synchronous
signal input circuit
Power
circuit
Secondary
battery
Outdoor unit
321
7. INDOOR CONTROL CIRCUIT
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