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Operations (contents of control)
(1) Defrosting conditions for system cooperation defrosting (hereinafter referred to as “cooperation defrosting
conditions”) are measured at each system, separately from normal defrosting conditions.
When multiple systems satisfy the cooperation defrosting conditions at the same time, the system that has
satisfied the conditions earlier starts defrosting.
(2) When a system that has started defrosting earlier is still defrosting, other systems do not perform defrosting
but continue heating operations.
(3) When defrosting of the system that started defrosting earlier ends, the system that has satisfied the
cooperation defrosting conditions next starts defrosting.
(4) When only one system satisfies the cooperation defrosting conditions, that system continues heating
operations, and performs defrosting at the point that normal defrosting conditions are satisfied.
(5) A system that has satisfied normal defrosting conditions starts defrosting to avoid the risk of remaining frost,
even if system cooperation defrosting is being performed.
<Operation examples of system cooperation defrosting>
(Example 1)
2-system cooperation defrosting
In a case where cooperation defrosting conditions are satisfied in the order of system
II
and
system
I
, defrosting is performed in the order of system
II
and system
I
.
*1 Continue heating without starting defrosting control while system
II
is defrosting
*2 Start defrosting after system
II
ends defrosting
System
I
Heating
→
→
→
Heating *1
Defrosting *2
Heating
System
II
Heating
→
→
→
Defrosting
Heating
Heating
(Example 5)
Example of not performing system cooperation defrosting
In a case where normal defrosting conditions are satisfied due to sudden increase in frost or the
like, defrosting is started to avoid the risk of remaining frost, even if other systems are performing
system cooperation defrosting.
*1 State where heating operations are continuing while system
II
is performing cooperation
defrosting
*2 If normal defrosting conditions are satisfied, defrosting is started without awaiting system
II
to
end defrosting.
System
I
Heating
→
→
→
Heating *1
Defrosting *2
Heating
System
II
Heating
→
→
→
Defrosting
Heating
Heating
(Example 2)
3-system cooperation defrosting
In a case where cooperation defrosting conditions are satisfied in the order of system
II
, system
I
and system
III
, defrosting is performed in the order satisfying conditions among the three systems.
*1 Continue heating without starting defrosting control while system
II
is defrosting
*2 Start defrosting after system
II
ends defrosting
*3 Start defrosting after system
I
ends defrosting.
System
I
Heating
→
→
→
Heating *1
Defrosting *2
Heating
System
II
Heating
→
→
→
→
→
Defrosting
Heating
Heating
Heating
Heating
Heating
→
→
→
→
Heating *1
Heating *1
Defrosting *3
System
III
Heating
*1
During system
II
defrosting, don't start defrosting control but continue heating.
*2
The system
II
is a defrosting start after the end of defrosting
(Example 3)
2-system cooperation defrosting out of three systems
In a case where cooperation defrosting conditions are satisfied in the order of system
II
and
system
III
, but system
I
does not satisfy conditions, system cooperation defrosting is performed by
system
II
and system
III
alone.
System
I
Heating
→
→
→
Heating
Heating
Heating
System
II
Heating
→
→
→
Defrosting
Heating
Heating
Heating
→
→
→
Heating *1
Defrosting *2
Heating
System
III
(Example 4)
Normal defrosting
In a case in where only system
II
satisfies defrosting conditions (system cooperation defrosting
conditions and normal defrosting conditions), only system
II
performs defrosting.
System
I
Heating
→
→
Heating
Heating
System
II
Heating
→
→
Defrosting
Heating
Heating
→
→
Heating
Heating
System
III
System
I
Stop
→
→
Stop
Stop
System
II
Heating
→
→
Defrosting
Heating
Stop
→
→
Stop
Stop
System
III