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Toshiba
8-3.
Hydro Unit
Control
1)Capacity control (compressor, high-temperature release, low-temperature release)
This unit controls the compressor frequency and heater output so that the water outlet temperature matches the remote
controller set temperature.
1-1)Compressor control
• Calculates the different between the remote controller set temperature (TSC_H, TSC_F) and the water outlet
temperature (Hot water supply: THO, Heating: TWO).
• Sets the Hz signal correction amount that determines the number of compressor rotations by the temperature
difference.
• Detects the number of compressor rotations.
• Compares the Hz signal correction amount and the current operation Hz, and changes the compressor output
according to the difference.
* The control details are the same for hot water supply, heating, and cooling.
Item Operation flow and applicable data, etc.
Temperature settings
(TSC_H, TSC_F)
Hz signal correction
Number of compressor
rotation detection
Remote controller
Water outlet temperature
(THO, TWO)
Hydro unit
TSC_H-THO for hot water supply
TSC_F-TWO
for heating/cooling
Inverter output change
Hz signal correction Operation Hz
Number of compressor
rotation change
Compressor frequency changeable range 10 Hz to 70 Hz (802, 1402H-E)
10 Hz to 60 Hz (1102H-E)
+00A09-002_01EN_SVM_ALL_Air_to_Water.book Page 48 Monday, October 5, 2009 2:09 PM