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(b) Outdoor unit side
1) Operating conditions :
2) Detail of operation
)
)
than that after fuzzy calulation, the speed is kept to 30(40)rps. However, when the thermo becomes OFF, the
speed is
)
30(40)rps
Note (1) Values in ( ) are for outdoor air temperature at 17ºC.
3)
Reset conditions:
Upper 90rps
Lower 30rps
OFF
11
Outdoor air temperature(
(7)
Heating low outdoor temperature protective control
(a) Operating conditions: When the outdoor air temperature (TH2) is 4ºC or lower continues for 30 seconds while the
(b) Detail of operation:The lower limit compressor command speed is change as shown in the figure below.
(c) Reset conditions:When either of the following condition is satisfied.
1)
The outdoor air temperature (TH2) is higher than 6ºC.
2)
The compressor command speed is 0 rps.
(8)
Compressor overheat protection
(a) Purpose: It is designed to prevent deterioration of oil, burnout of motor coil and other trouble resulting from the
compressor overheat.
(b) Detail of operation
1)
Speeds are controlled with temperature detected by the sensor mounted on the discharge pipe.
(Example) Fuzzy
Notes (1) When the discharge pipe temperature is in the range of 105~115ºC, the speed is reduced by 4 rps.
(2) When the discharge pipe temperature is raised and continues operation for 20 seconds without changing, then the speed is reduced again by 4 rps.
(3) If the discharge pipe temperature is in the range of 95~105 even when the compressor command speed is maintained for 3 minutes when the tem-
perature is in the range of 95~105ºC, the speed is raised by 1 rps and kept at that speed for 3 minutes. This process is repeated until the command
speed is reached.
Upper 75rps
Lower 40rps
13
16
17
)
º
compressor command speed is other than 0 rps.
-8
-6
Outdoor air temperature (°C)
After lapse of 3 min. or over
After lapse of 3 min. or over
After lapse of 3 min. or over
95
Discharge pipe temperature (˚C)
13
H
90(75)rps
30(40)rps
H
8
Lower limit 45 rps
Lower limit 35 rps
Normal operation
4
6
(3)
(3)
Lower limit
(3)
105
317
-
-
'12 • PAC-T-173
or 17
(1)
4 rps
4 rps
(4)
0 rps
115
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