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| FILE NO. | |||
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| Operation flow and applicable data, etc. | Description | ||||||||||||||
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4. |
| Capacity | The cooling or heating capacity depending on the load is | 1) The difference between set | |||||||||||||||||
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| control | adjusted. |
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| temperature on remote controller | ||||||||||
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| According to difference between the setup value of tempera- | (Ts) and room temperature (Ta) | |||||||||||||||
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| ture and the room temperature, the capacity is adjusted by | is calculated. |
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| the compressor revolution. |
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| 2) According to the temperature | ||||||||||||
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| difference, the correction value of | |||
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| Remote contr oller |
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| Indoor unit |
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| Hz signal which determines the | ||||||||||
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| compressor speed is set up. | |||
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| Set temp. (Ts) |
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| Room temp. (Ta) |
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| 3) The rotating position and speed | ||||||||||||||
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| of the motor are detected by the | |||
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| electromotive force occurred on | |||
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| Ts −Ta |
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| the motor winding with operation | ||||
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| of the compressor. | |||
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| 4) According to the difference | |||
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| Correction value of Hz signal |
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| resulted from comparison of the | ||||||||||
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| correction value of Hz signal with | |||
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| Detection of electromotive force |
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| the present operation Hz, the | ||||||||||
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| of compressor motor winding |
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| inverter output and the commuta- | |||||||||
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| tion timing are varied. | |||
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| 5) Change the compressor motor | |||
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| Detection of motor speed (Operation Hz) |
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| speed by outputting power to the | |||||||||||
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| and rotor position |
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| compressor. |
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| * The contents of control | |||
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| Correction value of Hz |
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| operation are same in cooling | |||||||||||||
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| operation and heating | |||
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| Inverter output change |
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| operation |
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| Commutation timing change |
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| Change of compressor speed |
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5. |
| Current release | This function prevents troubles on the electronic parts of the | 1) The input current of the outdoor | |||||||||||||||||
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| control | compressor driving inverter. |
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| unit is detected in the inverter | ||||||||||||||
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| This function also controls drive circuit of the compressor | section of the outdoor unit. | |||||||||||||||
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| speed so that electric power of the compressor drive circuit | 2) According to the detected | |||||||||||||||
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| does not exceed the specified value. |
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| outdoor temperature, the | ||||||||||||
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| specified value of the current is | |||
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| selected. |
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| Outdoor unit inverter main |
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| Outdoor temp. To |
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| 3) Whether the current value | |||||||||||||||
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| circuit control current |
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| exceeds the specified value or | |||
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| Setup of current release point |
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| 4) If the current value exceeds the | |||
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| High |
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| specified value, this function | ||||
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| Operating current ≤ |
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| reduces the compressor speed | ||||||||||
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| Reduce compressor speed |
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| Setup value |
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| and controls speed up to the | ||||||||||||
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| Low |
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| closest one commanded from the | ||||
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| Current decrease | indoor unit within the range | |||||||||||
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| which does not exceed the | ||||||||||
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| Capacity control continues |
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| specified value. |
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| Outdoor temp. | Cooling current release value |
| Heating current release value |
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| 113ºF (45ºC) |
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| 3.97A |
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| 4.27A |
| 6.30A |
| 7.72A |
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| 104ºF (40ºC) |
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| 111ºF (44ºC) | 4.35A |
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| 4.88A |
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| 61ºF (16ºC) |
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| 102ºF (39ºC) | 6.30A |
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| 8.47A |
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| 52ºF (11ºC) |
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| 60ºF (15.5ºC) |
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| 51ºF (10.5ºC) |
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| 6.30A |
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| 6.30A |
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– 33 –