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8-5. System Cooperation Defrosting
Overview
This is a function in which two systems or three systems of SMMS-u are communicably connected, and the
timing of defrosting at each system is offset.
Installing an indoor device of a different system in the same room and performing system cooperation defrosting
suppresses the room temperature from dropping while defrosting.
* In this section, system addresses are indicated by Roman numerals (
I
,
I
I
,
I
I
I
…), to differentiate from system
cooperation defrosting setup addresses.
System
I
Outdoor unit
Heating operations are continued until
defrosting of system
II
ends, even if
defrosting conditions are satisfied.
Defrosting is started after defrosting of
system
II
ends.
Defrosting of
system
II
ends
* During individual defrosting in an outdoor linked system, the system will be deemed to be defrosting even if the header
unit is performing heating operations.
System
II
defrosting
Defrosting of system
II
ended (heating)
Indoor
unit
Uh
Heating
U3
U4
Indoor
unit
Indoor
unit
System
II
Outdoor unit
Indoor
unit
Uh
Defrosting
U3
U4
Indoor
unit
Indoor
unit
System
II
Header unit
Uh
Defrosting
U3
U4
System
II
Follower unit
Heating
System
II
Header unit
Uh
Heating
U3
U4
System
II
Follower unit
Defrosting
System
II
Header unit
Uh
Heating
U3
U4
System
II
Follower unit
Heating
System
I
Outdoor unit
Indoor
unit
Uh
Defrosting
U3
U4
Indoor
unit
Indoor
unit
System
II
Outdoor unit
Indoor
unit
Uh
Heating
U3
U4
Indoor
unit
Indoor
unit
