Carrier RAV-SP180UT-UL Service Manual page 35

7-1-2. Connection of Wireless Remote Controller Kit
Indoor unit
#1 (Header)
Indoor control P.C. board
Louver
motor
Drain
pump
∗ Separately
sold parts for
ceiling type.
Indoor
fan motor
Power circuit
DC280V
Up to 8 units are connectable. ∗1
∗1 However Max.7 units are connectable in case of mounting network adapter
when two main (sub) remote controllers are connected.
Wireless remote controller kit
Receiver P.C. board
Display LED
Receive circuit
Buzzer
MCU
DC5V
Power Remote controller
circuit communication circuit
A B
DC20V
Remote controller
communication circuit
DC5V
DC12V
Humidifier output
Driver
Outside
output
MCU
Run
Warning
Defrost
Thermo. ON
COOL
Fan motor
HEAT
control circuit
FAN
Function setup SW
Grille up/down SW
Temporary
operation SW
TCJ sensor
MCU
Serial send/
receive circuit
AC
synchronous
signal input circuit
1 2 3
1 2 3
Outdoor unit
– 35 –
#2
(Follower)
A B
EEPROM
TA sensor
TC sensor
Same
as left
∗2
Float input
HA
Auto grille
panel
1 2
Outdoor unit
#3
(Follower)
A B
Same
as left
∗2
3 1 2 3
Outdoor unit