'18 • PAC-SM-298
-
26
-
'09•SRK-DB-087D
(b) Frost prevention control
(i) Operating conditions
(ii) Detail of anti-frost operation
(iii) Reset conditions
Indoor heat exchanger
temperature (°C)
2.5
5
8
0 rps
Lower
limit
speed
(2) Cooling overload protective control
(a) Operating conditions
(b) Detail of operation
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
Outdoor air temperature
Lower limit speed
1)
2)
1)
2)
1)
2)
1)
2)
(c) Reset conditions
(models SRK50, 60 : 25 rps)
Depends on compressor speed
The lower limit of compressor speed is set to 30 or 40 rps.
However, when the thermo OFF, the speed is reduced to 0 rps.
The outdoor fan is stepped up by 3 speed step. [Upper limit 8 th speed.]
compressor
speed
Keep the fan speed before
frost prevention control
2.5–5
5–8
When the outdoor air temperature (TH2) has become continuously for 30 seconds at 41°C or more, or
47ºC or more with the compressor running, the lower limit speed of compressor is brought up.
40°C.
(a) Purpose
Prevents anomalous high pressure operation during cooling
(b) Detector
Outdoor heat exchanger sensor (TH1)
(c) Detail of operation
P1
P2
P3
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 ove
Notes (1) When the outdoor heat exchanger temperature is in the range of P2-P3
䉝
, the speed is reduced by 8 rps at each 20 seconds.
(2) When the temperature is P3
䉝㻌
or higher, the compressor is stopped.
(3) When the outdoor heat exchanger temperature is in the range of P1-P2
䉝
, if the compressor speed is been maintained and the operation has continued for
more than 20 seconds at the same speed, it returns to the normal cooling operation.
r
(3)
lower limit
speed 30rps
(Example) Compressor speed
㻼㻝
㻼㻞
㼀㻴㻝㻌㻔
䉝
㻕
Outdoor air tamperature(
䉝
)
㻼㻟
Range A
25
26
31
32
Range B
Range C
㻾㼍㼚㼓㼑㻌㻭
㻾㼍㼚㼓㼑㻌㻮
㻡㻟
㻡㻝
㻡㻤
㻡㻟
㻢㻟
㻡㻢
㻾㼍㼚㼓㼑㻌㻯
㻠㻣
㻠㻥
㻡㻝
(4) Cooling low outdoor air temperature protective control
(a) Operating conditions
(b) Detail of operation
22
25
9
11
OFF
Upper 2
Lower 2
ON
ON
Upper 1
Lower 1
When the outdoor air temperature (TH2) is 22°C or lower continues for 20 seconds while the compressor speed is other than 0 rps.
Compressor speed: Upper/lower limit (rps)
Upper 2
Lower 2
Lower 1
Upper 1
Range A
Range B
26
24
Outdoor air temperature (
Υ
Range A
Range B
60
45
75
35
Release
1) It controls the upper and lower limit values for the compressor speed according to the following table.
2) It checks the outdoor temperature (TH2) once every hour to judge the operation range.
'09•SRK-DB-087D
(17)
Outline of heating operation
(a) Operation of major functional components in heating mode
(b) Details of control at each operation mode (pattern)
(i) Fuzzy operation
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
Outdoor fan
4-way valve
Model
Fan speed
Auto
MED
HI
LO
*It can be set the indoor fan motor off or the heating thermostat OFF with connecting a wired remote control.
In the case, indoor air temperature is detected by sensor on the wired remote control.
12-78rps
12-78rps
12-78rps
12-42rps
SRK20ZSX-S
12-86rps
12-86rps
12-86rps
12-50rps
SRK25ZSX-S
12-98rps
12-98rps
12-98rps
12-66rps
SRK35ZSX-S
12-106rps
12-106rps
12-106rps
12-78rps
SRK50ZSX-S
12-120rps
12-120rps
12-120rps
12-90rps
ULO
12-30rps
12-30rps
12-30rps
12-38rps
12-38rps
SRK60ZSX-S
(ii) Hot keep operation
(1) Defrost operation
During the heating operation, the indoor fan speed can be controlled based on the temperature of the indoor heat
exchanger (Th2) to prevent blowing out of cold air.
ECO
12-42rps
12-50rps
12-66rps
12-78rps
12-90rps
In case satisfied all of following conditions.
• Connect compressor speed 0 rps 10 times or more.
• Satisfy 1), 2) and 3) conditions above.
• Outdoor air temperature is 3°C or less.
(i)
(ii)
(i)
(ii)
(iii)
(vi)
(v)
Max. 18 minutes.
Heating operation
ͤ
Depends on an operation condition, the time can be longer than 7 minutes.
2-7 minutes
ͤ
Hot keep operation
Defrost operation
'09•SRK-DB-087D
(17)
Outline of heating operation
(a) Operation of major functional components in heating mode
(b) Details of control at each operation mode (pattern)
(i) Fuzzy operation
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
Outdoor fan
4-way valve
Model
Fan speed
Auto
MED
HI
LO
*It can be set the indoor fan motor off or the heating thermostat OFF with connecting a wired remote control.
In the case, indoor air temperature is detected by sensor on the wired remote control.
12-78rps
12-78rps
12-78rps
12-42rps
SRK20ZSX-S
12-86rps
12-86rps
12-86rps
12-50rps
SRK25ZSX-S
12-98rps
12-98rps
12-98rps
12-66rps
SRK35ZSX-S
12-106rps
12-106rps
12-106rps
12-78rps
SRK50ZSX-S
12-120rps
12-120rps
12-120rps
12-90rps
ULO
12-30rps
12-30rps
12-30rps
12-38rps
12-38rps
SRK60ZSX-S
(ii) Hot keep operation
(1) Defrost operation
During the heating operation, the indoor fan speed can be controlled based on the temperature of the indoor heat
exchanger (Th2) to prevent blowing out of cold air.
ECO
12-42rps
12-50rps
12-66rps
12-78rps
12-90rps
In case satisfied all of following conditions.
• Connect compressor speed 0 rps 10 times or more.
• Satisfy 1), 2) and 3) conditions above.
• Outdoor air temperature is 3°C or less.
(i)
(ii)
(i)
(ii)
(iii)
(vi)
(v)
-20
-20
-15
-10
-5
0
5
10
-15
-10
-5
0
Outdoor air temperature (
℃
)
Outdoor heat exchanger temperature (
℃
)
-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
Defrost operation start temperature
Defrost operation start temperature
Models SRK20, 25, 35
Models SRK50, 60
Outdoor air temperature (°C)
37 38
40 41
OFF
ON1
ON2
Outdoor air temperature (°C)
40 41
46 47
OFF
ON1
ON2
46 47
ON3
'09•SRK-DB-087D
(b) Frost prevention control
(i) Operating conditions
(ii) Detail of anti-frost operation
(iii) Reset conditions
Indoor heat exchanger
temperature (°C)
2.5
5
8
0 rps
Lower
limit
speed
(2) Cooling overload protective control
(a) Operating conditions
(b) Detail of operation
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
Outdoor air temperature
Lower limit speed
1)
2)
1)
2)
(i)
(ii)
(i)
(ii)
(c) Reset conditions
(models SRK50, 60 : 25 rps)
Depends on compressor speed
The lower limit of compressor speed is set to 30 or 40 rps.
However, when the thermo OFF, the speed is reduced to 0 rps.
The outdoor fan is stepped up by 3 speed step. [Upper limit 8 th speed.]
compressor
speed
Keep the fan speed before
frost prevention control
2.5–5
5–8
When the outdoor air temperature (TH2) has become continuously for 30 seconds at 41°C or more, or
47ºC or more with the compressor running, the lower limit speed of compressor is brought up.
40°C.
1.4 Operation control function by the outdoor control
Summary of Contents for FDE40ZSXW1VH
Page 46: ... 18 PAC SM 298 45 ...
