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External control adapter for outdoor unit
CENTRAL
C/H
SELECTOR
OFF ON
C/H
DE
BOTH
FUNCTION
CENTRAL
TERMINAL
C/H
NO.
ADDRESS
Cool/Heat
selector
<Master unit>
C/H SELECT
MASTER
IND
C/H SELECT
OUT
IN
C/H SELECTOR
I-O
To indoor unit
C/H SELECT
MASTER
IND
C/H SELECT
OUT
IN
C/H SELECTOR
I-O
O-O
To indoor unit
<Slave unit>
SLAVE
OUT-MULTI
O-O
C/H SELECTOR
SLAVE
OUT-MULTI
C/H SELECTOR
C/H SELECT
IND
MASTER SLAVE
C/H SELECT
OUT
IN
I-O
O-O
OUT-MULTI
C/H SELECT
IND
MASTER
SLAVE
C/H SELECT
OUT
IN
I-O
O-O
OUT-MULTI
To indoor unit
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