Daikin RTSQ20PY1 Service Manual page 192

Field Setting
(4) Set Cool / Heat for More Than One Outdoor Unit System Simultaneously in Accordance with Unified
Master Outdoor Unit by Cool / Heat Selector
External control adaptor for outdoor unit
SS2
F1
F2
SS1 SS1
N
BOTH C/H
FUNCTION
P
DS2
CENTRAL
C/H
NO.
<Master unit>
IND
H3P
OUT
O
IN I
C/H SELECTOR
A B C F1
To indoor unit
181
Install the external control adaptor for outdoor unit on either the outdoor-outdoor, indoor-
outdoor transmission line.
Mount the COOL/HEAT selector to the master outdoor unit for the unified control.
Set the DS1-1 on the PCB of master outdoor unit to OUT.
In setting mode 1, set the outdoor unit you want to give cool/heat selection permission to as
the group master, and set the other outdoor units as group slave units.
Set the outdoor unit external control adaptor SS1 to BOTH (factory setting) or C/H, and SS2
to OFF (factory setting).
C/H SELECT
CENTRAL
IND
C/H
SELECTOR
OFF ON
H3P
OUT
O
DE
CN24
DS1-1
DS1
IN I
C/H SELECTOR
A B C F1
TERMINAL
ADDRESS
Cool/Heat
selector To indoor unit
C/H SELECT
MASTER SLAVE
H4P H5P
C/H SELECT
I-O O-O OUT-MULTI
F2 F1 F2 Q1 Q2
Multi outdoor units connection
MASTER SLAVE
H4P H5P
C/H SELECT
I-O O-O OUT-MULTI
F2 F1 F2 Q1 Q2
<Slave unit>
C/H SELECT
IND
MASTER
H3P H4P
C/H SELECT
OUT
O
IN
I
C/H SELECTOR I-O
A B C F2 F1
F1
C/H SELECT
IND MASTER
H3P H4P
C/H SELECT
OUT
O
IN I
C/H SELECTOR I-O
A B C F1 F2 F1
To indoor unit
SLAVE
H5P
O-O OUT-MULTI
F2 Q1 Q2
SiBE31-801_C
SLAVE
H5P
O-O OUT-MULTI
F2 Q1 Q2
Test Operation