'09•SRK-DB-087D
(e) Cooling low outdoor air temperature protective control
Operating conditions:
Detail of operation:
Reset conditions:
First time
Since the
seconds times
Outdoor air temperature (˚C)
A B C D E F
1)
2)
1)
2)
50 (30) <20> rps, the speed is kept to 50 (30) <20>rps. However, when the thermo becomes OFF,the speed is
50
<20>
than
50 52
50 52
E FC D
OFF
Upper limit 50 rps
Lower limit 50 rps
ON
ON
Upper limit 52 rps
Lower limit 30 rps
ON
Upper limit 120 rps
Lower limit 20 rps
Outdoor air temperature (°C)
A B
3 7
<120>
<120>
(2)
< >
27
30
25
25
27
27
30
30
3 30
(ii)
(i)
(iii)
'09•SRK-DB-087D
(b) Frost prevention control
(i) Operating conditions
(ii)
(iii)
Detail of anti-frost operation
Reset conditions:
Indoor heat exchanger
temperature (ºC)
2.5 5 8
0 rps
Lower
limit
speed
compressor
command
speed
(c) Cooling overload protective control
Operating conditions:
Detail of operation
Reset conditions:
(d) Cooling high pressure control
Purpose:
Detector:
Detail of operation:
53
58
60
Outdoor heat exchanger temperature (°C)
8rps
(1)
8rps
(1)
0rps
After lapse of 30 sec. or over
(3)
After lapse of 30 sec. or over
(3)
After lapse of 30 sec. or over
(3)
lower limit
speed 20 rps
(Example) Fuzzy
Indoor heat exchanger
temperature
Item
5°C or lower 2.5°C or lower
Lower limit of compressor command speed
Indoor fan
Outdoor fan
4-way valve
Item
SRK80ZL-S
Outdoor air temperature
Lower limit speed
Model
1)
2)
1)
2)
1)
2)
more, or 47ºC or more with the compressor running, the lower limit
The lower limit of compressor command speed is set to 20 or 25 rps and even if the calculated result becomes lower than
that after fuzzy calculation, the speed is kept to 20 or 25 rps. However, when the thermo becomes OFF, the speed is
reduced to 0 rps.
60
60
20
16
20 25
2
8
(i)
(ii)
(iii)
(i)
(ii)
(iii)
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