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(9) Heating overload protective control
(a) Operating conditions
When the outdoor air temperature (TH2) is 13°C or higher continues for 30 seconds while the compressor speed is other than 0 rps
(b) Detail of operation
(i)
the upper limit, the upper limit value is maintained.
(ii)
fuzzy calculation, the speed is kept to 30(40)rps. However, when the thermostat OFF, the speed is reduced to 0 prs.
Note Values in ( ) are for outdoor air temperature at 17°C.
(c)
Reset conditions
(c)
Reset conditions
Heating low outdoor temperature protective control
(10)
Heating low outdoor air temperature protective control
(10)
(a)
Operating conditions
(a)
Operating conditions
(b)
Detail of operation
(b)
Detail of operation
(c) Reset conditions
When either of the following condition is satisfied
(i)
The outdoor air temperature (TH2) is higher than 6ºC.
(ii)
The compressor speed is 0 rps.
(iii)
Compressor protection start II is activate.
(11) 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
(i)
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 95-105ºC even when the compressor speed is maintained for 3 minutes when the temperature 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.
(4) Lower limit speed
Lower limit speed
30(40)rps
H
11ºC.
H
40ºC.
Upper limit 90rps
Upper limit 85rps
Lower limit 30rps
Lower limit 30rps
OFF
OFF
11
13
16
40
41
46
Outdoor air temperature(°C)
Outdoor air temperature(°C)
H
4
H
4
-1
1
4
-1
1
4
-10
-8
-1
Outdoor air temperature(°C)
Outdoor air temperature(°C)
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)
Cooling
25 rps
191
-
90(75)rps
Upper limit 75rps
Upper limit 60rps
Lower limit 40rps
Lower limit 40rps
17
47
lower
lower
Lower limit 45 rps
Lower limit 45 rps
Lower limit 55rps
Lower limit 45rps
Lower limit 35 rps
Lower limit 35 rps
Lower limit 35rps
Normal operation
Normal operation
Normal operation
6
6
1
4
6
(3)
(3)
Lower limit
(3)
105
Heating
32 rps
-
'22 • PAC-SM-422
calculation exceeds
than that after
(1)
4 rps
4 rps
(4)
0 rps
115
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