3. Single group operation
• Each indoor unit controls the outdoor unit individually.
4. Multiple groups operation (Manual address setting)
• Master unit: The master unit receives the indoor unit data (thermostat status) of the sub (Without identical
line address & indoor/outdoor serial) and then finally controls the outdoor compressor
matching with its own thermostat status.
The master unit sends this command information to the sub unit.
• Sub unit:
The sub unit receives the indoor unit data from the master (With identical line address & indoor/
outdoor serial) and then performs the thermostat operation synchronized with the master unit.
The sub unit sends own thermostat ON/OFF demand to the master unit.
(Example)
No. 1-1 master unit sends/receives signal to/from No. 1-2 and No. 1-3 sub units.
(It is not influenced by the line 2 or 3 address indoor unit.)
2-1
Header/Sub
1-1
Header/Sub
4-1
Header/Master
3-1
Header/Sub
8-1
Header/Sub
2-1
Header/Sub
1-1
Header/Sub
1-2
Follower/Sub
3-1
Header/Master
3-2
Follower/Sub
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