Panasonic CS-C12PKV, Service Manual

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13.15.2.3 Judge ambient condition
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According to sunlight intensity over a period of time, the system will analyze the ambient condition is sunny,
cloudy or night.
13.15.2.4 Temperature Shift
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In a room without window or with thick curtain, the sunlight sensor will judge as cloudy/night.
13.15.2.5 Sunlight Sensor Check Mode
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To enable sunlight sensor check mode, during unit is OFF (power standby):
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Operation details
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The sunlight sensor check mode will be operated for 5 minutes.
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During check mode, the ON and OFF timer will be memorized but it operation be ignored.
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During check mode, if the sunlight sensor check code is retransmitted, the 5 minutes counter will be reset.
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During check mode, if sunlight sensor detected the sunlight intensity value above minimum level, the
ECONAVI indicator turns ON. Else if sunlight sensor detected sunlight intensity value below minimum level,
the ECONAVI indicator is OFF.
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To disable sunlight sensor check mode
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After check mode is ended (5 minutes counter elapsed), press AUTO OFF/ON button at indoor unit.
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If the sunlight sensor detected sunlight intensity is at abnormal range, the check mode will be ended.