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Control Specification (15/18/24 Class)
SiUS04-702
48
Function and Control
4.2
Frequency Control
Outline
Frequency will be determined according to the difference between room and set temperature.
The function is explained as follows.
1. How to determine frequency.
2. Frequency command from an indoor unit. (The difference between a room temperature and the
temperature set by the remote controller.)
3. Frequency command from an indoor unit.
4. Frequency initial setting.
5. PI control.
Detail
How to Determine Frequency
The compressor’s frequency will finally be determined by taking the following steps.
For Heat Pump Model
1. Determine command frequency
Command frequency will be determined in the following order of priority.
1.1 Limiting frequency by drooping function
Input current, discharge pipes, low Hz high pressure limit, peak cutting, freeze prevention, dew
prevention, fin thermistor temperature.
1.2 Limiting defrost control time
1.3 Forced cooling
1.4 Indoor frequency command
2. Determine upper limit frequency
Set a minimum value as an upper limit frequency among the frequency upper limits of the
following functions:
Compressor protection, input current, discharge pipes, Low Hz high pressure, peak cutting,
freeze prevention, defrost.
3. Determine lower limit frequency
Set a maximum value as an lower limit frequency among the frequency lower limits of the
following functions:
Four way valve operating compensation, draft prevention, pressure difference upkeep.
4. Determine prohibited frequency
There is a certain prohibited frequency such as a power supply frequency.
Command frequency
Limit frequency
Skip control
Upper limit function
Compressor protection function
Lower limit function
Four-way valve operating compensation, etc. (*)
Initial frequency
PI control
Defrost control (*)
Drooping function
Input current control, etc.
Upper limit frequency
FMAX
Lower limit frequency
FMIN
Target frequency
Command frequency X repeats when frequency becomes lower
Frequency changes by PI control < repeats when frequency becomes lower
*; only for heat pump model
(R2831)
Содержание FTXS09DVJU
Страница 1: ...SiUS04 702 Applied Models z Inverter Pair Heat Pump Inverter Pair Wall Mounted Type D Series...
Страница 12: ...SiUS04 702 List of Functions 1 Part 1 List of Functions 1 List of Functions 2...
Страница 14: ...SiUS04 702 Specifications 3 Part 2 Specifications 1 Specifications 4...
Страница 76: ...SiUS04 702 Instruction Operation Manual 65 2 2 FTXS09 12DVJU 2 2 1 Names of Parts...
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Страница 113: ...Instruction SiUS04 702 102 Operation Manual 2 3 7 HOME LEAVE Operation...
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Страница 191: ...Check SiUS04 702 180 Service Diagnosis...
Страница 247: ...RX09 12FVJU SiUS04 702 236 Removal Procedure When reassembling make sure to fit the hook Step Procedure Points...
Страница 254: ...SiUS04 702 RX09 12FVJU Removal Procedure 243 5 Pull the sound blanket bottom out Step Procedure Points...
Страница 259: ...RX09 12FVJU SiUS04 702 248 Removal Procedure 4 Lift the compressor up and remove it Step Procedure Points...
Страница 290: ...SiUS04 702 Others 279 Part 8 Others 1 Others 280 1 1 Test Run from the Remote Controller 280 1 2 Jumper Settings 281...
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Страница 305: ...SiUS04 702 vi Index...