For controlling the air conditioner, the program operations are built in the microcomputer as described in the following table. If a claim is made for running operation, check whether or not it meets to the contents in the following table. When it does, we inform you that it is not trouble of equipment, but it is indispensable for control- ling and maintaining of air conditioner.
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No. | Operation of air conditioner | Description |
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1 | When power breaker is turned “ON”, the | The OPERATION lamp of the indoor unit flashes when |
| operation lamp (Green) of the indoor unit | power source is turned on. If [START/STOP] button is |
| flashes. | operated once, flashing stops. (Flashes also in power |
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| failure) |
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2 | Compressor may not operate even if the | The compressor does not operate while compressor |
| room temperature is within range of | restart delay timer |
| The same phenomenon is found after power source has | |
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| been turned on because |
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3 | In Dry and ECONO. mode, FAN (air flow) | The air flow indication is fixed to [AUTO]. |
| display does not change even though FAN |
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| (air flow select) button is operated. |
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4 | Increasing of compressor motor speed | For smooth operation of the compressor, the compressor |
| stops approx. 30 seconds after operation | motor speed is restricted to Max. 41 rps for 2 minutes, and |
| started, and then compressor motor speed | Max.91 rps for 2 minutes to 3 minutes, respectively after |
| increases again approx. 30 seconds after. | the operation has started. |
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5 | The set value of the remote controller | If the set value is above the room temperature, Cooling |
| should be below the room temperature. | operation is not performed. And check whether battery of |
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| the remote controller is consumed or not. |
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6 | In AUTO mode, the operation mode is | After selecting Cool or Heat mode, select an operation |
| changed. | mode again if the compressor keeps stop status for 15 |
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| minutes. |
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7 | In HEAT mode, the compressor motor | The compressor motor speed may decrease by |
| speed does not increase up to the maxi- | release control (Release protective operation by |
| mum speed or decreases before the | of the indoor heat exchanger) or current release control. |
| temperature arrives at the set tempera- |
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| ture. |
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10-2. Primary Judgment
To diagnose the troubles, use the following methods.
(1)Judgment by flashing LED of indoor unit
(2)
(3)Judgment of trouble by every symptom
Firstly use the method (1) for diagnosis. Then, use the method (2) or (3) to diagnose the details of troubles.
