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7-4-4. Setting when connecting indoor units to FS (Flow Selector) unit and when connecting
safety equipment
Cautions to connection of indoor unit
• When connecting the indoor units to a single port type FS unit, a branch of the multi port type FS unit
it is necessary to setup CODE No.[FE]
Be sure to setup CODE No. [FE] after setup of address.
• When connecting the indoor units to a single port type FS unit and a branch of the multi port type FS unit it is possible
to connect with multiple groups or connect individually.
• When connecting the indoor units to a branch of the multi port type FS unit,
it is necessary to set up the port address No. (the CODE No. [105]） .
Be sure to set up the port address No..
• When connecting the indoor units to combining branches of the multi port type FS unit,
it is necessary to set up the CODE No. [106].
Be sure to set up the CODE No. [106].
• Even if there is no safety equipment, be sure to set safety measures (the CODE No. [107]).
Connection rules
• It is possible to branch after the port.
• It is possible to set the group of indoor units after the port.
• The multiport type FS unit can be set as group of indoor units across ports.
1) Group settings across ports are allowed only to adjacent (contiguous) ports.
2) Only some indoor units in one port are not allowed to be grouped with the indoor units on other ports.(It is allowed to
group all indoor units in one port with the indoor units of other ports.)
• Ports can be combined and used.
1) Port combining is allowed to up to 2 ports. Port combining of 3 or more ports is not allowed.
2) Port combining is allowed only to adjacent ports.
• Group settings across FS units are not allowed.
• The FS unit are allowed in the system.
• Connecting both FS units to the same indoor unit is not allowed.
• It is not possible to setup port combining across the PC board of the multiport type FS unit.
• Be sure to connect the No.1 port of the multiport type FS unit to the indoor unit.
(If the indoor unit is not connected to No.1 port, the air conditioning system will not operate.)
• In the case of the same group, connect only one communication line to the FS unit (one place).
(The connection location should be made at the A/B? terminal of the address
with the smallest port address of the FS unit.)
Setting rules
• The safety measures for indoor units set in the group shall be the same. (Allow mixing in the system.)
• Only one detector is used in a group.
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