-
61
-
'10 • SRK-T-098
(9) Outline of heating operation
(a) Operation of major functional components in heating mode
(b) Details of control at each operation mode (pattern)
1) Fuzzy operation
Deviation between the indoor temperature setting correction temperature and the return air temperature is calculated in
accordance with the fuzzy rule, and used for control of the air capacity and the compressor speed.
When the defrosting, protection device, etc. is actuated, operation is performed in the corresponding mode.
2) Hot keep operation
If
the hot keep operation is selected during the heating operation, the indoor blower is controlled based on the temperature
of the indoor heat exchanger (Th2) to prevent blowing of cool wind.
ON OFF
ON ON
ON
OFF
(few minutes ON)
ON ON(HOT KEEP)
OFF
OFF
(3 minutes ON)
OFF
OFF
Thermostat ON Thermostat OFF Failure
Heating
Compressor
Indoor fan motor
Outdoor fan motor
4-way valve
30~115rps
30~115rps
30~76rps
30~46rps
SRK35ZJX-S
30~102rps
30~102rps
30~72rps
30~42rps
SRK25ZJX-S
30~94rps
30~94rps
30~66rps
30~40rps
SRK20ZJX-S
Model
Fan speed
Auto
MED
HI
LO
(c) Defrosting operation
1)
Starting conditions (Defrosting operation can be started only when all of the following conditions are met.)
a) After start of heating operation
When it elapsed 45 minutes. (Accumulated compressor operation time)
b)
After end of defrosting operation
When it elapsed 45 minutes. (Accumulated compressor operation time)
c) Outdoor heat exchanger sensor (TH1) temperature
When the temperature has been below
－
5ºC for 3 minutes continuously.
d) The difference between the outdoor air sensor temperature and the outdoor heat exchanger sensor temperature
¡
The outdoor air temperature
≧
0ºC
: 7ºC or higher
¡
－
15ºC
≦
The outdoor air temperature
＜
0ºC : 4/15 × The outdoor air temperature + 7ºC or higher
¡
The outdoor air temperature
＜
－
15ºC :
－
5ºC or higher
-20
-20 -15 -10 -5 0 5 10
-15
-10
-5
0
Outdoor air temperature (℃)
Outdoor heat exchanger temperature (℃)
Defrost operation
start
Defrost operation start temperature
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