Mitsubishi SRK Series User Manual

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75
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'18 • SRK-T-250
)
(g) Heating overload protective control
Outdoor unit side
1) Operating conditions
2) Detail of operation
3) Reset conditions
(i) Operating conditions:
(ii) Detail of operation:
(h) Heating low outdoor temperature protective control
(iii) Reset conditions:
-10 -8 -2 2
Lower limit 45 rps
Lower limit 40 rps
Normal operation
Outdoor air temperature(°C
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)
Note(1) Range A and B are as shown below.
Note(1) Range A and B are as shown below.
• Model SRK50
• Model SRK50
• Models SRK20 ~ 35
• Models SRK20, 25, 35
(i) ࠉ Operating conditions: When the outdoor air temperature (TH2) is lower than 4ºC or 13ºC or higher continues for 30
seconds while the compressor command speed is other than 0 rps.
(ii)ࠉDetail 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)
a)
b)
c)
d)
The lower limit of compressor 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 thethermostat OFF, the speed is reduced to 0 rps.
fan speed is
rps.
1) Operating conditions
2) Detail of operation
When the outdoor air temperature (TH2) is 11ºC or higher continues for 30 seconds while the compressor speed other than 0 rps.
a)
b)
c)
d) Refer to the right table about the outdoor fan speed.
Taking the upper limit of compressor speed range at 90 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 speed is set to 27 rps and even if the calculated result becomes lower than that after
fuzzy calculation, the speed is kept to 27 rps. However, when the thermostat OFF, the speed is reduced to 0 prs.
rps.
3) Reset conditions
1)
2)
27
Protective
control
ON1
ON2
Item
Compressor speed
Low limit
30 rps
30 rps
Upper limit
78 rps
51 rps
When the outdoor air temperature (TH2) is 22°C or higher continues for 30 seconds while the compressor speed other than 0 rps.
The outdoor air temperature (TH2) is lower than 21°C.
The outdoor air temperature (TH2) is lower than 10°C.
Outdoor fan speed
It depends on compressor speed
2nd
Taking the upper limit of compressor speed at 60 rps, if the output speed obtained with the fuzzy calculation
exceeds the upper limit, the upper limit value is maintained.
Compressor speed : Upper/lower limit (rps)
Outdoor fan speed
Lower limit
Upper limit
Range ARange B
40 Release602nd
Range A
Range B
Indooor air temperature( )Υ
21 23
Range A
Range B
Indooor air temperature( )Υ
21 23
Lower limit
Upper limit
Range ARange B
Compressor speed : Upper/lower limit (rps)
Outdoor fan speed
ON127Release90
It depends on
compressor speed
ON22727602nd

Mitsubishi SRK Series Specifications

General

Brand	Mitsubishi
Model	SRK Series
Category	Air Conditioner
Language	English