Carrier MMY-MAP0724FT9UL Service Manual page 91

Switch setting (setting example when controlling 2 or more refrigerant lines centrally)
Outdoor units (setting manually)
Outdoor unit's interface
P.C. board
SW13, 14
(Line (system) address)
Dip switch 2 of SW30
(Terminator of indoor/
outdoor communication
line and central control
line)
Relay connector
Header unit
U3 U4
U1 U2 U5 U6
Relay
connector
U1 U2
A B
Remote
controller
Indoor units
(automatic setting)
Line (system) address
Indoor unit address
Group address
CAUTION
Relay connector connection
Never connect relay connectors between the [U1, U2] and [U3, U4] terminals before completing address
setting of all the refrigerant lines. Otherwise, the addresses cannot be set correctly.
Header unit Follower unit
(No setting
1
required)
(No setting
ON
required)
Connect after
setting Open
addresses.
Follower unit Header unit
U3 U4
U1 U2 U5 U6
connector
U1 U2
A B
Remote
controller
Individual
1 1
1 2
0 0
*The items in bold font must be set manually.
Header unit Follower unit
(No setting
2
required)
Set to OFF
(No setting
after setting
required)
addresses.
Connect after
setting Open
addresses.
Follower unit
U3 U4 U3 U4
U1 U2 U5 U6 U1 U2 U5 U6
Relay
U1 U2 U1 U2
A B A B
Remote
controller
Group
2
1
1
– 91 –
Header unit
3
Set to OFF
after setting
addresses.
Connect after
setting
addresses.
Header unit
U3 U4
U1 U2 U5 U6
Relay
connector
U1 U2
A B
Remote
controller
2 3
2 1
2 0
Factory default
1
ON
Open
Central
remote
controller