'18 • SRK-SM-259
-
12
-
'09•SRK-DB-087D
(h) Heating overload protective control
(i) Indoor unit side
1) Operating conditions
2) Detail of operation
3) Reset conditions
(ii) Outdoor unit side
b) Detail of operation
c) Reset conditions:
1)
Operating conditions
2)
Detail of operation
(i) Heating low outdoor temperature protective control
3) Reset conditions
10 11 19 20
Normal operation
Protective control ON1
Protective control ON2
Outdoor air temperature(°C)
21 22
Normal operation
Protective
control
Outdoor air temperature(°C)
• Model 50
• Model 50
1)
ࠉ
Operating conditions: When the outdoor air temperature (TH2) is lower than 4ºC or higher continues for 30 seconds
while the compressor command speed is other than 0 rps.
2)
ࠉ
Detail of operation: The lower limit compressor command speed is change as shown in the figure belo.
Lower limit 29 rps
Normal operation
46
Outdoor air temperature(°C)
1) Operating conditions
When the outdoor air temperature (TH2) is 22 (11 or 20)ºC or higher continues for 30 seconds while the compressor
speed other than 0 rps.
i)
ii)
iii)
iv)
Taking the upper limit of compressor command speed range at 60 rps, if the output speed obtained with the fuzzy
calculation exceeds the upper limit, the upper limit value is maintained.
The lower limit of compressor command speed is set to 40 rps and even if the calculated result becomes lower than
that after fuzzy calculation, the speed is kept to 40 rps. However, when thethermo becomes OFF, the speed is
reduced to 0 prs.
rps.
a) Operating conditions :
b) Detail of operation
When the outdoor air temperature (TH2) is 11ºC or higher continues for 30 seconds while
the compressor command speed other than 0 rps.
i)
ii)
iii)
iv)
Taking the upper limit of compressor command speed range at 78 rps, if the output speed obtained with the fuzzy
calculation exceeds the upper limit, the upper limit value is maintained.
The lower limit of compressor command speed is set to 30 rps and even if the calculated result becomes lower than
that after fuzzy calculation, the speed is kept to 30 rps. However, when thethermo becomes OFF, the speed is
reduced to 0 prs.
rps.
.
c) Reset conditions:
.
a)
b)
30
Protective
control
NO1
NO2
Item
Compressor command speed
Low limit
30 rps
30 rps
Upper limit
78 rps
51 rps
It depends on compressor command speed
Outdoor fan speed
2nd
10
(i) Protective control I
2 (-8)
lower
4 (-6)
changed as shown in the figure below.
-10 -8 204
Lower limit 45(55) rps
Models SRK25, 35
Lower limit 40 rps
Lower limit 38(40) rps
Normal operation
Outdoor air temperature(°C )
-8 -6
Lower limit 27 rps
Model SRK45
Normal operation
Outdoor air temperature(°C )
Note (1)
Values in ( ) are for the model SRK35.
(Example) Fuzzy
Discharge pipe temperature (˚C)
Lower limit
(4)
After lapse of 60 seconds. or over
(3)
After lapse of 60 seconds. or over
(3)
After lapse of 60 seconds. or over
(3)
4 rps
4 rps
(1)
0 rps
90 100 110
(j) Compressor overheat protection
(i) Purpose
It is designed to prevent deterioration of oil, burnout of motor coil and other trouble resulting from the compressor over-
heat.
(ii) Detail of operation
1) Speeds are controlled with temperature detected by the sensor mounted on the discharge pipe.
Notes (1) When the discharge pipe temperature is in the range of 100 to 110 ºC, the speed is reduced by 4 rps.
(2) When the discharge pipe temperature is raised and continues operation for 20 seconds without changing, then the speed is reduced again by 4
rps.
(3) If the discharge pipe temperature is in the range of 90-100ºC even when the compressor speed is maintained for 60 second when the tempera-
ture is in the range of 90-100ºC, the speed is raised by 1 rps and kept at that speed for 60 second. This process is repeated until the compres-
sor speed is reached.
(4) Lower limit speed
Cooling Heating
Models SRK25, 35
15 rps 20 rps
Model SRK45
20 rps 30rps
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