System Cooperation Defrosting - Toshiba MMY-MUP0721FT6P-UL Service Manual

6-4. System Cooperation Defrosting

Overview
This is a function in which two systems or three systems of SHRM-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.
*When this setup is carried out, central remote controller cannot be connected.
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
System II defrosting
* In this section, system addresses are indicated by Roman numerals (I, II, III...), to differentiate from system
cooperation defrosting setup addresses.
Indoor Indoor
unit unit
Defrosting of
system II ends
Indoor Indoor
unit unit
System II System II
Header unit Follower unit
Heating Defrosting
Uh
U3 U4
- 112 -
System I
Defrosting is started after defrosting of
system II ends.
Outdoor unit
Defrosting
Uh
Indoor
U3 U4
unit
System II
Outdoor unit
Heating
Uh
Indoor
U3 U4
unit
System II System II
Header unit Follower unit
Heating Heating
Uh
U3 U4
Defrosting of system II ended (heating)
Indoor Indoor
unit unit
Indoor Indoor
unit unit