Hitachi RAK-50NH5, Instruction Manual, Page: 15 / 207

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Explanation of the sleep timer
The device will control the FAN SPEED and room temperature automatically
so as to be quiet and good for people’s health.
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If date or current time is not set, sleep timer can not be set.
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If you set the sleep timer after the off-, on/off- or off/on-timer has been
set, the sleep timer becomes effective instead of the off-, on/off- or off/
on-timer set earlier.
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You can not set other timer during sleep timer operation.
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After sleep timer time is up and when press sleep button again, the
sleep timer will be set as last setting.
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Sleep timer effective only once.
NOTE