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11. Defrost control
In heating operation, defrost operation is performed when TE sensor temperature satisfies any
condition in A zone to D zone.
The defrost operation is immediately finished if TE sensor temperature has become 12°C or more, or
it also is finished when condition of 7°C ≤ TE < 12°C has continued for 1 minute. The defrost operation
is also finished when defrost operation has continued for 10 minutes even if TE sensor temperature
has become 7°C or lower.
After defrost operation has finished, the compressor and the outdoor fan start heating operation after
stopped for approx. 50 seconds.
Start of heating operation
a
b
c
d
T
SM560
28
28
28
60
120
A zone
B zone
C zone
D zone
Defrost operation is performed in this zone when TE0-TE ≥ 3 continued for T seconds.
Defrost operation is performed in this zone when TE0-TE ≥ 3 continued for T seconds.
Defrost operation is performed when this zone continued for T seconds.
Defrost operation is performed when this zone continued for T seconds.
0 10 15 c b a d [min]
*
TE [˚C]
–5
–10
–13
–18
A z
A z
one
one
B z
B z
one
one
C z
C z
one
one
D z
D z
one
one
A zone
B zone
C zone
D zone
* The minimum TE value between 10 and 15 minutes after heating operation has started is stored in memory as TE0.
SM800, SM1100, SM1400
34
40
55
90
20