(1/f fluctuation fan)
| Control/conditions | Unit operation | Explanation |
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SENSOR | The ON/OFF operation | The operation lamp illuminates. | The outdoor unit does not operate for 3 minutes |
DRY | button on the remote | The indoor fan operates at the set fan speed. | even after the breaker is turned ON. |
| controller is pressed. | The outdoor unit stops. |
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| The outdoor unit starts. | The frequency is increased at the rate of 0.5 |
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| Hz every 1 seconds. |
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| (Compressor and the outdoor fan start.) |
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| When the frequency reaches Hz, | This is in order to stabilize the return of oil to the |
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| frequency increases are stopped for a period | compressor. |
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| of seconds. (Refer to Table 1.) |
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| The frequency then increases. | If the indoor and outdoor temperatures are high, |
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| the current peak |
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| any increases in frequency. |
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| The room temperature | DRY operation starts | Operating frequency is stabilized in order to |
| reaches the desired |
| maintain a comfortable environment. |
| temperature, and there | DRY A operation |
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| is no need for further |
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| cooling. | The indoor fan changes between "Low" | Operates to effectively dehumidify the air while |
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| and "LL" (very low) over a | not excessively reducing the indoor |
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| This is 1/f fluctuation fan operation. | temperature. |
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| (Refer to Fig. 1.) | The indoor unit operates at 1/f fluctuation fan |
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| operation, at a fan speed that does not cause |
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| a chilly feeling. |
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| The room temperature is | DRY B operation |
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| 59 °F or higher, and is |
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| slightly too cold. | (1) The indoor fan changes between "Low" | The compressor operates on a |
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| and "LL" (very low) over a | |
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| This is 1/f fluctuation fan operation. | temperature from dropping too much. |
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| (2) After appoximately 3 minutes, the |
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| compressor turns OFF, the outdoor fan |
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| turns OFF, and the indoor fan turns OFF. |
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| (3) After approximately 6 minutes, the |
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| conditions return to (1). |
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| The room temperature is | Monitoring operation begins. | When monitoring operation begins, the |
| below 59 °F. |
| compressor stops, and the indoor fan operates at |
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| "LL" (very low) speed. |
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1/f fluctuation fan
250
200
150
(Step)
100
50
0
Fig. 1
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