Service manual
70
30AW
Defrost control (Only in heating opearation)
In heating operation, defrost operation is performed when TE sensor temperature satises any condition in A zone to D
zone.
* The minimum TE value between 10 and 15 minutes of compressor run time is stored inside the memory as TE0. TE0 is
calculated after each compressor restart in heating operation.
** 120 sec for sizes 004 , 006, 012
*** 2,5 for 004 and 006 sizes
****2,5 for 008 size
During the defrost:
tUIFSFWPMVUJPOTGSFRVFODZPGDPNQSFTTPSDIBOHFUPHVBSBOUFFUIFSJHIURVBOUJUZPGPJMJOTJEFUIFDPNQSFTTPS
tUIF1.7QPTJUJPOJTöYFE
The defrost operation is immediately nished if TE sensor temperature has become ε °C or more, or it also is also nished
when defrost operation has continued for τ minutes.
TE: Entering
(in Heat
exchanger)
temperature
TE0: minimum
TE value
calculated 10-
15 min. after
each
compressor
restart in
heating
operation
For 004, 006 and 008 sizes, defrost operation is also nished if TE is kept at+5°C or higher for 80seconds.
For 012 and 015 sizes, defrost operation is also nished if -7 ≤ TE < 12 has continued for 60 seconds.
After defrost operation has nished, the compressor and the outdoor fan start heating operation after stopped for approx.
50 seconds.
A zone Defrost operation is performed in this zone when TE0-TE ≥ 3**** continued for T seconds**
B zone Defrost operation is performed in this zone when TE0-TE ≥ 3**** continued for T seconds**
C zone Defrost operation is performed when this zone continued for T seconds**
D zone Defrost operation is performed when this zone continued for T seconds**
a b c d (A) (B) (C) (D)
27'70'' 27'40'' 34' - -5 -7 - -20 Size 004-006
29 29 35 - -4 -6 -10 -25 Size 008
34 40 55 90 -5 -10 -13 -18 Size 012
39 45 55 150 -5 -10 -2 -23 Size 015
size 004 006 008 012 015
Є [°C] +8 +12
τ [min] 15 10
Control management
5
SM_30AW.indd 70 14-03-2011 14:45:19