Toyotomi CCT140A-M, Service Manual

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Electrical Control Function
Electrical Control
For the others type::
The compressor is running, and 4-way valve and outdoor fan stop. The indoor fan works as anti-cold wind
procedure. When defrosting is over, the compressor keeps running and the 4-way valve and outdoor fan will
start up.
For 3-phase outdoor units:
l
Condition of defrosting:
T3<0
℃
and the compressor keeps running over 45 minutes. Meanwhile T3
＜
-3
℃
for 3minutes.
l
Condition of ending defrosting:
If any one of the following items is satisfied, the defrosting will terminate and the machine will turn to normal
heating mode.
A: T3 rises to be higher than 20
℃
.
B: The machine has run for 10 minutes in defrosting.
l
Defrosting action
：
The compressor is running, and 4-way valve and outdoor fan stop. The indoor fan works as anti-cold wind
procedure. When defrosting is over, the compressor keeps running and the 4-way valve and outdoor fan will
start up.
Setting defrosting time
45S 45S
Compressor
4 way valve 40S
40S
Outdoor fan
Indoor fan
10S