-
47
-
'14 • SR-T-157
When the defrosting, protection device, etc. is actuated, operation is performed in the corresponding mode.
(ii) 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.
However, if the fan speed setting is HI and room temperature is 19ºC or higher, this control is not executed.
30~115rps
30~115rps
30~76rps
30~46rps
SRR35ZJ-S
30~102rps
30~102rps
30~72rps
30~42rps
SRR25ZJ-S
Model
Fan speed
Auto
MED
HI
LO
(c) Defrosting operation
(i) Starting conditions (Defrosting operation can be started only when all of the following conditions are met.)
1) After start of heating operation
When it elapsed 45 minutes. (Accumulated compressor operation time)
2) After end of defrosting operation
When it elapsed 45 minutes. (Accumulated compressor operation time)
3) Outdoor heat exchanger sensor (TH1) temperature
When the temperature has been below –5ºC for 3 minutes continuously.
4) The difference between the outdoor air sensor temperature and the outdoor heat exchanger sensor temperature
¡
The outdoor air temperature
≧
0°C : 7°C or higher
¡
-15°C
≦
The outdoor air temperature
＜
0°C : 4/15 × The outdoor air tempe 7°C or higher
¡
The outdoor air temperature < -15°C : -5°C or higher
5) During continuous compressor operation
In addition, when the speed command from the indoor controller of the indoor unit during heating operation has
counted 0 rps 10 times or more and all conditions of 1), 2), 3) and 5) above and the outdoor air temperature is 3°C
or less are satisfied (note that when the temperature for outdoor heat exchanger sensor (TH1) is -5°C or less: 62 rps
or more, -4°C or less: less than 62 rps), defrost operation is started.
(ii) Ending conditions (Operation returns to the heating cycle when either one of the following is met.)
1) Outdoor heat exchanger sensor (TH1) temperature: 13ºC or higher
2)
Continued operation time of defrosting → For more than 16 minutes and 50 seconds.
-20
-20
-15
-10
-5
0
5
10
-15
-10
-5
0
Outdoor air temperature (
℃
)
O
ut
do
or
he
at
ex
ch
an
ge
r
te
m
pe
ra
tu
re
(
℃
)
-20
-20
-15
-10
-5
0
5
10
-15
-10
-5
0
Outdoor air temperature (
℃
)
O
ut
do
or
he
at
ex
ch
an
ge
r
te
m
pe
ra
tu
re
(
℃
)
Defrost operation
start
Defrost operation
start
De
fro
st
op
era
tio
n s
tar
t t
em
pe
rat
ur
e
De
fro
st
op
era
tio
n s
tar
t t
em
pe
rat
ur
e
Models 20
～
35
Model 50
Max. 16 minutes and 50 seconds
Heating operation
¡
Defrost operation
̪
Depends on an operation condition, the time can be longer than 7 minutes.
2~7 minutes
̪
Hot keep operation
