Mitsubishi Heavy Industries SRK63ZR-WF Technical Manual page 50

RPSmin < 40
40 < = RPSmin < 80
80 < = RPSmin < 90
90 < = RPSmin < 102
102 < = RPSmin
(g) Heating overload protective control
(i) Indoor unit side
1) Operating conditions
2) Detail of operation
3) Reset conditions
(ii) Outdoor unit side
1) Operating conditions
When the outdoor air temperature (TH2) is 13ºC or 17ºC or higher continues for 30 seconds while the compressor
command speed other than 0 rps.
2) Detail of operation
a) Taking the upper limit of compressor command speed range at 90 rps or 50 (75) rps, if the output speed
obtained with the fuzzy calculation exceeds the upper limit, the upper limit value is maintained.
b) The lower limit of compressor command speed is set to 30 rps or 40 rps and even if the calculated result
becomes lower than that after fuzzy calculation, the speed is kept to 30 rps or 40 rps. However, when the
thermo OFF, the speed is reduced to 0 prs.
c)
3) Reset conditions
a) Operating conditions :
OFF
b) Detail of operation
i) 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.
(h) Heating low outdoor temperature protective control
ii) 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 the thermo becomes OFF, the speed is
(i) Operating conditions
When the outdoor air temperature (TH2) is lower than 4℃ or higher continues for 30 seconds while the compressor reduced to 0 prs.
command speed is other than 0 rps
iii)
(ii) Detail of operation
30
The lower limit compressor command speed is change as shown in the figure below.
iv)
-12 -10
Note(1) Values in ( ) are for the model SRK63.
(iii) Reset conditions
When either of the following condition is satisfied
1) The outdooe air temperature (TH2) becomes 6℃.
c) Reset conditions:
2) The compressor command speed is 0 rps.
(h) Heating low outdoor temperature protective control
(i) Operating conditions:
(ii) Detail of operation:
49 53
53 57
53 ~ 47 57 ~ 51
47 ~ 41 51 ~ 45
41 45
30 rps or 40 rps.
Upper 50 (75) rps
Lower 40 rps
Upper 90 rps
Lower 30 rps
When the outdoor air temperature (TH2) is 11ºC or higher continues for 30 seconds while
the compressor command speed other than 0 rps.
11 13 16 17
Outdoor air temperature (°C)
rps.
Item
Compressor command speed
Protective
Low limit
control
NO1
30 rps
NO2
30 rps
-8 -6 -4 -2 4
Normal operation
Outdoor air temperature (°C)
49
-
55 58
59 62
59 ~ 53 58
53 ~ 47 51
47 51
10
.
Note(1) Values in ( ) are for the model SRK63.
Lower limit 60 rps
Upper limit
Lower limit 50(45) rps
78 rps
It depends on compressor command speed
51 rps
Lower limit 40(45) rps
Protective control ON2
Lower limit 35 rps
Normal operation
Protective control ON1
6
10 11 19
Outdoor air temperature(°C)
11
-
Lower limit 40 rps
'22 • SRK-T-362
Outdoor fan speed
2nd
20
.
4