Toshiba RUAGP Series Original Owner's Manual page 55

Air-cooled chiller
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5. Fan control
DC motors control fans to make them turn at 100 to 900 rpm.
In Cooling mode, the fan speed is controlled in such a way that the condensing temperature will be equal to the
setpoint according to the compressor frequency. In the Heating mode, the fan speed is controlled according to
the compressor frequency and the outdoor air temperature.
6. Factory defaults
(a) Time guards
Compressor minimum running time
Compressor minimum stop time
Circuit increase interval (minimum)
Circuit decrease interval (minimum)
Fan pre-operation time
Internal pump pre-operation (minimum)
Internal pump remaining operation (minimum)
Note 1: The time guards shown above are provided to prevent frequent starting and stopping of the
compressor. The compressor operation will start after the internal pump pre-operation time
and the fan pre-operation time have elapsed.
(b) Module controller
Cooling setting outlet temperature
Heating setting outlet temperature
Percentage of module faults for major faults
Demand current
(c) Unit controller
Item
Cooling setting outlet temperature
Heating setting outlet temperature
Minimum defrosting interval
Maximum defrosting time
Minimum oil return operation interval
(during heating operation)
Pump operation frequency
Event
Item
Unit Factory setting Variable range Variable step
°C
°C
%
Unit
°C
°C
Minutes
Minutes
Minutes
Hz
During group control
from module controller
180 seconds
120 seconds
60 seconds
30 seconds
20 seconds
15 seconds
15 seconds
7
4 to 30
45
25 to 55
100
0 to 100
A
0
0 to 5000
Factory setting
Variable range
7
45
25 to 55
20
20 to 90
10
240
180 to 300
35
24 to 60
- 53 -
During individual
module operation
0.1
0.1
1
1
Variable step
4 to 30
0.1
0.1
1
5 to 12
1
10
1

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