12.5. The following phenomena do not represent abnormality (emergency)
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| Phenomenon | Display of remote controller | Cause |
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| Indoor unit does not the perform cool- | “Cooling (heating)” flashes | When another indoor unit is performing the heating (cooling) opera- |
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| ing (heating) operation. |
| tion, the cooling (heating) operation is not performed. |
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| The auto vane runs freely. | Normal display | Because of the control operation of auto vane, it may change over to |
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| horizontal blow automatically from the downward blow in cooling in case |
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| the downward blow operation has been continued for 1 hour. At de- |
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| frosting in heating, hot adjusting and thermostat OFF, it automatically |
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| changes over to horizontal blow. |
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| Fan setting changes during heating. | Normal display | |
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| Light air automatically changes over to set value by time or piping tem- |
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| perature at thermostat ON. |
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| Fan stops during heating operation. | Defrost display | The fan is to stop during defrosting. |
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| Fan does not stop while operation has | No lighting | Fan is to run for 1 minute after stopping to exhaust residual heat (only |
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| been stopped. |
| in heating). |
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| No setting of fan while start SW has | Heat ready | Ultra |
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| been turned on. |
| temperature becomes 35°C, low speed operation for 2 minutes there- |
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| after, and then set notch is commenced. (Hot adjust control) |
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| Outdoor unit does not operate by turn- | Normal display | When the outdoor unit is being cooled and the refrigerant is resting, |
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ENGLISH |
| ing switch on. |
| warming up operation is performed for at least 35 minutes to warm the |
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| compressor. | |
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| During this time, only the fan operates. |
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| Indoor unit remote controller shows | “HO” flashes | System is being driven. |
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| “HO” indicator for about two minutes |
| Operate remote controller again after “HO” disappear. |
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| when turning ON universal power sup- |
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| ply. |
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| Drain pump does not stop while unit has | Light out | After a stop of cooling operation, unit continues to operate drain pump |
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| been stopped. |
| for three minutes and then stops it. |
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| Drain pump continues to operate while |
| Unit continues to operate drain pump if drainage is generated, even |
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| unit has been stopped. |
| during a stop. |
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| When the variable capacity unit is run- | Normal display | The fan of constant capacity unit is run automatically in order not to |
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| ning, the fan of the constant capacity |
| accumulate the refrigerant. |
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| unit runs even though the constant ca- |
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| pacity unit isn’t running. |
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38