Mitsubishi Heavy Industries SRR25ZJ-S, Техническое руководство, Страница: 53 / 174

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52
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'14 • SR-T-157
'09•SRK-DB-087D
(f) 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 :
2) Detail of operation
21 22
Normal operation
Protective
control
Outdoor air temperature(°C)
Model 50
A B C D
RPSmin < 40
40 <= RPSmin < 80
80 <= RPSmin < 90
90 <= RPSmin < 102
102 <= RPSmin
49
53
41
53 ~ 47
47 ~ 41
53
57
45
57 ~ 51
51 ~ 45
55
59
47
59 ~ 53
53 ~ 47
58
62
51
58
51
When the outdoor air temperature (TH2) is 22ºC or higher continues for 30 seconds while
the compressor command speed other than 0 rps.
a)
b)
c)
d)
Taking the upper limit of compressor command speed range at 60 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 command 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
thermo OFF, the speed is reduced to
0 prs.
rps.
(iii) Reset conditions:
.
(g) Heating low outdoor temperature protective control
(i) Operating conditions:
When the outdoor air temperature (TH2) is lower than -10ºC or higher continues for 30 seconds
while the compressor command speed is other than 0 rps.
(ii) Detail of operation:
The lower limit compressor command speed is change as shown in the figure below.
(iii) Reset conditions:
When either of the following condition is satisfied.
1) The outdoor air temperature (TH2) becomes -7ºC.
2) The compressor command speed is 0 rps.
-10 -7
Lower limit 45 rps
Normal operation
Outdoor air temperature (°C)