Heating Low Outdoor Temperature Protective Control - Mitsubishi Electric DXK09ZJ-S Technical Manual

that after fuzzy calculation, the speed is kept to 40 rps. However, when the thermo becomes OFF, the speed is
reduced to 0 prs.
iii)
iv)
c) Reset conditions:
• Model 18
a) Operating conditions :
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.
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
reduced to 0 prs.
iii)
30
iv)
c) Reset conditions:
(g) Heating low outdoor temperature protective control
• Models 09, 12
1) Operating conditions:
2) Detail of operation:
3) Reset conditions:
a)
b)
• Model 18
Operating conditions: When the outdoor air temperature (TH2) is lower than 4ºC or higher continues for 30 seconds
1)
2) Detail of operation:
Lower limit 29 rps
rps.
Normal operation
21
Outdoor air temperature(°C)
When the outdoor air temperature (TH2) is 11ºC or higher continues for 30 seconds while
the compressor command speed other than 0 rps.
rps.
Item
Compressor command speed
Protective
Low limit
control
30 rps
ON1
ON2
30 rps
Normal operation
-10 -8 -2
Outdoor air temperature(°C)
while the compressor command speed is other than 0 rps.
The lower limit compressor command speed is change as shown in the figure belo.
Protective
control
22
Upper limit
78 rps
It depends on compressor command speed
51 rps
Protective control ON2
Protective control ON1
10 11 19
Outdoor air temperature(°C)
10
Lower limit 45 rps
Lower limit 40 rps
Normal operation
2

- -
Normal operation
'11 • SRK-T-118
.
Outdoor fan speed
2nd
20
.