Mitsubishi Heavy Industries V Multi FDC71VNX Technical Manual page 119

(a) Operating conditions
(a) Operating conditions
When the outdoor air temperature (TH2) has become continuously for 30 seconds at 41°C or more, or
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.
47ºC or more with the compressor running, the lower limit speed of compressor is brought up.
Outdoor air temperature
Outdoor air temperature
Lower limit speed
Lower limit speed
(b) Detail of operation
(b) Detail of operation
1) The outdoor fan is stepped up by 3 speed step. [Upper limit 8 th speed.]
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 30 or 40 rps.
2) 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.
However, when the thermo OFF, the speed is reduced to 0 rps.
(c) Reset conditions
(c) Reset conditions
1)
1)
2)
2)
(4) Cooling low outdoor air temperature protective control
(a) Operating conditions
When the outdoor air temperature (TH2) is 22°C or lower continues for 20 seconds while the compressor speed is other than 0 rps.
(b) Detail of operation
1) It controls the upper and lower limit values for the compressor speed according to the following table.
(4) Cooling low outdoor air temperature protective control
2) It checks the outdoor temperature (TH2) once every hour to judge the operation range.
(4) Cooling low outdoor air temperature protective control
(a) Operating conditions
(a) Operating conditions
Compressor speed: Upper/lower limit (rps)
When the outdoor air temperature (TH2) is 22°C or lower continues for 20 seconds while the compressor speed is other than 0 rps.
When the outdoor air temperature (TH2) is 22°C or lower continues for 20 seconds while the compressor speed is other than 0 rps. Lower 1
Range B Range A
(b) Detail of operation
(b) Detail of operation
35 Release
1) It controls the upper and lower limit values for the compressor speed according to the following table.
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.
2) It checks the outdoor temperature (TH2) once every hour to judge the operation range.
Compressor speed: Upper/lower limit (rps)
Upper 2
ON
Compressor speed: Upper/lower limit (rps)
Lower 2
Lower 1
Range B
Range B Range A ON
35
35 Release
Upper 2
ON
9 11 22
ON Upper 2
Lower 2
Lower 2
9
9 11
(c) Reset conditions
When either of the following condition is satisfied.
1) The outdoor air temperature (TH2) is D°C or higher.
2) The compressor speed is 0 rps.
(5 ) Heating high pressure control
(c) Reset conditions
(a) Purpose
(c) Reset conditions
When either of the following condition is satisfied.
When either of the following condition is satisfied.
1) The outdoor air temperature (TH2) is D°C or higher.
(b) Detector
1) The outdoor air temperature (TH2) is D°C or higher.
2) The compressor speed is 0 rps.
2) The compressor speed is 0 rps.
(5 ) Heating high pressure control
(c) Detail of operation
40°C.
40°C.
Upper 1 Lower 2 Upper 2
75 45 60
Lower 1
Upper 1 Lower 2 Upper 2
Range A
Upper 1 Lower 2 Upper 2
Upper 1
Release 75 45
Lower 1
75 45 60
OFF
25
Upper 1
ON
Upper 1
ON
Lower 1
Lower 1
OFF
OFF
11 22 25
22 25
THi-R
Range A
Range B
24 26
Outdoor air temperature (
Range A
Range B
Range B
60
24
24 26
Outdoor air temperature (
Outdoor air temperature (
118
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'19 • PAC-T-327
'09•SRK-DB-087D
'09•SRK-DB-087D
Range A
26
'09•SRK-DB-087D