Mitsubishi Heavy Industries SRK60ZSX-S Technical Manual page 46

2) When this control has continued for more than 30 minutes continuously,the following wind direction control is performed.
a) When the vertical wind direction is set at other than the vertical swing,the flaps change to the horizontal position.
b) When the horizontal wind direction is set at other than the horizontal swing,the louver changes to the vertical position.
(iii) Reset condition
Humidity is less than 63%.
(b) Frost prevention control
(b) Frost prevention control
(i) Operating conditions
(i) Operating conditions
1)
1)
2)
2)
(ii) Detail of anti-frost operation
(ii) Detail of anti-frost operation
Indoor heat exchanger
Indoor heat exchanger
Item
Item
Lower limit of compressor command speed
Lower limit of compressor command speed
Indoor fan
Indoor fan
Outdoor fan
Outdoor fan
4-way valve
(b) Frost prevention control
4-way valve
(i) Operating conditions
1)
2)
(iii) Reset conditions
(iii) Reset conditions
(ii) Detail of anti-frost operation
Indoor heat exchanger
1)
1)
Item
2)
Lower limit of compressor command speed 2)
Indoor fan
(c) Cooling overload protective control
(c) Cooling overload protective control
Outdoor fan
(i) Operating conditions
(i) Operating conditions
4-way valve
When the outdoor air temperature (TH2) has become continuously for 30 seconds at 38°C or more, or 41°C or more, or
When the outdoor air temperature (TH2) has become continuously for 30 seconds at 38°C or more, or 41°C or more, or
47ºC or more with the compressor running, the lower limit speed of compressor is brought up.
47ºC or more with the compressor running, the lower limit speed of compressor is brought up.
Item
(iii) Reset conditions
Item
Outdoor air temperature
Outdoor air temperature
Lower limit speed
Lower limit speed
1)
(ii) Detail of operation
(ii) Detail of operation
2)
1) The outdoor fan is stepped up by 3 speed step. [Upper limit 8 th speed.]
SRK20, 25, 35
1) The outdoor fan is stepped up by 3 speed step. [Upper limit 8 th speed.]
2) The lower limit of compressor speed is set to 25 or 30 or 40rps.
2) The lower limit of compressor speed is set to 25 or 30 or 40rps.
(c) Cooling overload protective control
However, when the thermo OFF, the speed is reduced to 0 rps.
However, when the thermo OFF, the speed is reduced to 0 rps.
(i) Operating conditions
(iii) Reset conditions
(iii) Reset conditions
ON1
When the outdoor air temperature (TH2) has become continuously for 30 seconds at 38°C or more, or 41°C or more, or
OFF
47ºC or more with the compressor running, the lower limit speed of compressor is brought up.
1)
1)
37 38 40 41
2)
2)
Outdoor air temperature (°C) Item
Outdoor air temperature
(d) Cooling high pressure control
(d) Cooling high pressure control
Lower limit speed
(i) Purpose
(i) Purpose
(ii) Detail of operation
Prevents anomalous high pressure operation during cooling.
Prevents anomalous high pressure operation during cooling.
1) The outdoor fan is stepped up by 3 speed step. [Upper limit 8 th speed.]
(ii) Detector
(ii) Detector
2) The lower limit of compressor speed is set to 25 or 30 or 40rps.
Outdoor heat exchanger sensor (TH1).
Outdoor heat exchanger sensor (TH1).
However, when the thermo OFF, the speed is reduced to 0 rps.
(iii) Detail of operation
(iii) Detail of operation
(iii) Reset conditions
(Example) Compressor speed
(Example) Compressor speed
1)
2)
(d) Cooling high pressure control
(i) Purpose
P1
Prevents anomalous high pressure operation during cooling.
P1
Outdoor heat exchanger temperature (°C)
(ii) Detector
Outdoor heat exchanger temperature (°C)
temperature
5°C or lower
temperature 5°C or lower
(models SRK50, 60 : 25 rps)
(models SRK50, 60 : 25 rps)
Depends on compressor speed
Depends on compressor speed
temperature
5°C or lower
(models SRK50, 60 : 25 rps)
Depends on compressor speed
Model
Model
SRK20, 25, 35ZSX-S
SRK20, 25, 35ZSX-S
38°C or more
38°C or more
25 rps
25 rps
ON3
ON2
Model
46 47
SRK20, 25, 35ZSX-S
38°C or more
25 rps
After lapse of 30 sec. or over (3)
After lapse of 30 sec. or over
After lapse of 30 sec. or over (3)
After lapse of 30 sec. or over
After lapse of 30 sec. or over
(3)
After lapse of 30 sec. or over
2.5°C or lower
2.5°C or lower
Keep the fan speed before
Keep the fan speed before
frost prevention control
frost prevention control
2.5–5
2.5–5
5–8
5–8
2.5°C or lower
Keep the fan speed before
frost prevention control
2.5–5
5–8
SRK50, 60ZSX-S
41°C or more
41°C or more
30 rps
30 rps
SRK50, 60
ON1
OFF
37°C (models SRK50, 60 : 40°C).
37°C (models SRK50, 60 : 40°C).
40 41
SRK50, 60ZSX-S
Outdoor air temperature (°C)
41°C or more
30 rps
8rps (1)
8rps (1)
(3)
37°C (models SRK50, 60 : 40°C).
8rps (1)
8rps (1)
(3)
lower limit
lower limit
speed 30rps
(3)
speed 30rps
0rps
0rps
45
- -
P2 P3
P2 P3
'17 • SRK-T-203
'09•SRK-DB-087D
compressor
compressor
speed
speed
Lower
Lower
limit
'09•SRK-DB-087D
limit
speed
speed
0 rps
0 rps
2.5
Indoor heat exchanger
Indoor heat exchanger
temperature (°C)
compressor
speed
Lower
limit
speed
0 rps
2.5
Indoor heat exchanger
temperature (°C)
SRK50, 60ZSX-S
47°C or more
47°C or more
40 rps
40 rps
ON2
46 47
47°C or more
40 rps
Range B
Range A
Range A
31 32
31 32
Outdoor air tamperature(
Outdoor air tamperature(
'09•SRK-DB-087D
5 8
2.5 5 8
temperature (°C)
5 8
Range B
)
)