-
44
-
'19 • PAC-SM-312
(a)
Operating conditions
(b)
Detail of operation
(10)
Heating low outdoor temperature protective control
-1
1
4
6
Lower limit 45 rps
Lower limit 35 rps
Normal operation
Outdoor air temperature(°C)
Outdoor air temperature(°C)
11
H
lower
4
11
13
16
17
OFF
Upper limit 75rps
Lower limit 40rps
Upper limit 90rps
Lower limit 30rps
H
Reset conditions
(c)
(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.
Discharge pipe temperature (
˚
C)
Lower limit
(4)
After lapse of 3 min. or over
(3)
After lapse of 3 min. or over
(3)
After lapse of 3 min. or over
(3)
4 rps
4 rps
(1)
0 rps
(Example) Fuzzy
95
105
115
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
Cooling
Heating
Lower limit speed
25 rps
32 rps
(9) Heating overload protective control
(a) Operating conditions
(b) Detail of operation
13
90(75)rps
30(40)rps
H
Note (1) Values in ( ) are for outdoor air temperature at 17
(i)
(ii)
than 0 rps.while the compressor speed is other
than 0 rps.
calculation exceeds
the upper limit, the upper limit value is maintained.
than that after
fuzzy calculation, the speed is kept to 30(40)rps. However, when the thermostat OFF, the speed is reduced to 0 prs.
