Toshiba RAV-RM561FT-EN Service Manual page 83

(Group control operation)
In a group control, operation of maximum 8 indoor units can be controlled by a remote controller.
Twin, triple or double twin of an outdoor unit is one of the group controls.
The indoor unit connected with outdoor unit (Individual/Header of twin) controls room temperature according to
setting on the remote controller.
<System example>
OUT
IN
1-1
Remote controller
1. Display range on remote controller
The setup range (Operation mode/Fan speed select/Setup temp) of the indoor unit which was set to the
header unit is reflected on the remote controller.
2. Address setup
If there is no serial communication between indoor and outdoor when the power is turned on, it is judged as
follower unit of the twin. (Every time when the power is turned on)
• The judgment of header (wired) / follower (simple) of twin is carried out every time. It is not stored in
nonvolatile memory.
Turn on power of the indoor unit to be controlled in a group within 3 minutes after setting of automatic address.
If power of the indoor unit is not turned on within 3 minutes (completion of automatic address setting), the
system is rebooted and the automatic address setting will be judged again.
1) Connect indoor/outdoor connecting wire surely.
2) Check line address/indoor address/group address of the unit one by one.
Especially in case of twin, triple, double twin, check whether they are identical system address or not.
3) The unit No. (line/indoor group address) which have been set once keep the present status as a rule if
the unit No. is not duplicated with one of another unit.
OUT OUT
Header
IN IN
2-1 3
OUT
IN
1 -
– 83 –
OUT
IN
4 1 - 8 1 -
Max. 8 units