Toshiba ESTIA HWS-1501CSHM3-E, Service Manual

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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 (803, 1403H-E, 1603H8(R)-E)
10 Hz to 60 Hz (1103H-E, 1103H8(R)-E)
10 Hz to 66 Hz (1403H8(R)-E)