Toshiba RAV-SM404MUT-E Service Manual page 84

4. Single group operation
• Each indoor unit controls the outdoor unit individually.
2-1
Header/Sub
5. Multiple groups operation (Manual address setting)
2-1
Header/Sub
• Master unit: The master unit receives the indoor unit data (thermo status) of the sub
(Without identical line address & indoor/outdoor serial) and then finally controls the outdoor
compressor matching with its own thermo 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 thermo operation synchronized with the master unit.
The sub unit sends own thermo 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.)
1-1 4-1
Header/Sub Header/Master
1-1 1-2
Header/Sub Follower/Sub
3-1
Header/Sub
3-1
Header/Master Follower/Sub
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8-1
Header/Sub
3-2 3-3
Follower/Sub