Toshiba SHRM R410A Quick Reference page 21

Switch setting (setting example when controlling 2 or more refrigerant lines centrally)
Outdoor units (setting manually)
Outdoor unit's interface
Header unit
P.C. board
SW13, 14
(Line (system) address)
Bit switch 2 of SW30
(Terminator of indoor/
outdoor communication
line and central control
line)
Connect after
Relay connector
addresses.
Header unit
U3 U4
U1 U2 U5 U6
Relay
connector
U1 U2
A B
Remote
controller
Individual
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.
Follower unit Header unit
(No setting
1
required)
(No setting
ON after setting
required)
Connect after
setting Open
Follower unit Header unit
U3 U4
U1 U2 U5 U6 U1 U2 U5 U6
Relay
connector
U1 U2 U1 U2
A B
Remote
controller
1 1
1 2
0 0
*The items in bold font must be set manually.
Follower unit
(No setting
2
required)
Set to OFF
(No setting
required)
addresses.
setting Open
addresses.
Follower unit
U3 U4 U3 U4
U1 U2 U5 U6
U1 U2
A B A B
Remote
controller
Group
2 2
1 2
1 2
Header unit Factory default
3 1
Set to OFF
after setting ON
addresses.
Connect after
setting Open
addresses.
Header unit controller
U3 U4
U1 U2 U5 U6
Relay
connector
U1 U2
A B
Remote
controller
3
1
0
20
Central
remote