System Cooperation Defrosting - Toshiba SMMS-u MMY-MUP0801HT8 Quick Reference

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
Heating operations are continued until
System I
defrosting of system II ends, even if
Outdoor unit
defrosting conditions are satisfied.
Heating
Uh
Indoor
U3 U4
unit
System II
Outdoor unit
Defrosting
Uh
Indoor
U3 U4
unit
* 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 System II
Header unit Follower unit
Defrosting Heating
Uh
U3 U4
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.
Indoor Indoor
unit unit
Indoor Indoor
unit unit
System II
Header unit
Heating
Uh
U3 U4
System II defrosting
System I
Outdoor unit
Defrosting
U3
Defrosting of
System II
system II ends
Outdoor unit
Heating
U3
System II System II
Follower unit Header unit
Defrosting
Defrosting of system II ended (heating)
– 59 –
Defrosting is started after defrosting of
system II ends.
Uh
Indoor
U4
unit
Uh
Indoor
U4
unit
System II
Follower unit
Heating Heating
Uh
U3 U4
Indoor Indoor
unit unit
Indoor Indoor
unit unit