-
43
-
'20 • PAC-SM-351
(e) Outdoor fan control by the power transistor radiator n temperature
When all the following conditions are established later than 3 minutes after the start of compressor, the following
control is implemented.
(i) Cooling/dehumidifying
1)
Outdoor air temperature (Tho-A)
33°C
2)
Compressor’s actual frequency
A
rps
3)
Powertransistorradiatorntemperature
C
°C
(ii) Heating
1)
Outdoor air temperature (Tho-A)
16°C
2)
Compressor’s actual frequency
B
rps
3)
Powertransistorradiatorntemperature
C
°C
(iii) Control contents
1) Raises the outdoor fan tap by 1 tap.
2) When the sampling is for 60 minutes and the value of power transistor radiator n temperature (Tho-P) is as
follows.
a)
Whenthe power transistorradiatorn temperature (Tho-P)
C
°C, the outdoor fan tap is raised by 1 speed
further.
b)
When
C
°C>powertransistorradiatorntemperature(Tho-P)>
D
°C, present outdoor fan tap is maintained.
c)
Whenthepowertransistorradiatorntemperature(Tho-P)
D
°C, the outdoor fan tap is dropped by 1 speed.
(iv) Ending conditions
When the operation under the condition of item 2), c) above and with the outdoor fan tap, which is determined by the
item (b) is detected 2 times consecutively.
•Compressor’sfrequencyandpowertransistorradiatorntemperature
Item
Model
A B C D
FDC100-140 65 65 72 68
(f) Caution at the outdoor fan start control (3 phase model only)
When the outdoor fan is running at 400min
-1
before operating the compressor, it may operate with the compressor only,
without starting up the outdoor fan this is normal.
(g) Snow protection fan control
If the dip switch (SW3-2) on the outdoor control PCB is turned ON, the outdoor fan is operated for 30 seconds at 4 tap
speed once in every 10 minutes depending on the outdoor air temperature (detected with Tho-A) in the stop mode or
anomalous stop mode.
Snow protection fan
control ON
Outdoor air temperature (°C)
3 5
Snow protection fan
control OFF
To Next Page
Loading...
Need help?
General
