25
①
unit start defrost shall meet one of the following conditions
:
a.
compressor cumulate running time over 30 minutes and it continuous running over 3 minutes, the
temperature of coil pipe of the outdoor units is equal to or less than
-
15
℃
for one minutes
(Tp
2
≤-15℃).
b.
compressor cumulate running time over 40 minutes and it continuous running over 3 minutes, the
temperature of coil pipe of the outdoor units is equal to or less than
-
5
℃
for one minutes
(Tp
2
≤-15℃)
.
c.
Air conditioner first power on or it wait over 30 minutes ,the temperature of coil pipe of the outdoor units is
equal to or less than
-
2
℃
(Tp
2
≤-15℃)
②
end defrost condition(meet one of follows)
a.
the temperature of coil pipe of the outdoor units is more than 15
℃
(Tp
2
≥-15℃).
b.
defrost time have fifteen minutes.
c o m p r e s s o r
o u t d o o r
b l o w e r f a n
d o o r
b l o w e r f a n
TP2
Tr
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