Hitachi RAK-18NH6AS - Troubleshooting and Service; Remote Control Issues; Unit Operation Issues

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FAN SPEED (AUTO)
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 When theAUTO fan speed mode is set in the cooling/heating operation:
For the heating operation
l When the difference of room temperature and setting temperature is
large, fan starts to run at HI speed.
l After room temperature reaches the preset temperature, the heating
operation, which changes the fan speed and room temperature to obtain
optimum conditions for natural healthful heating will be performed.
l When the difference of room temperature and setting temperature is
large, fan starts to run at HI speed.
l After room temperature reaches the preset temperature, the cooling
operation, which changes the fan speed and room temperature to obtain
optimum conditions for natural healthful cooling will be performed.
For the cooling operation
FAN OPERATION
You can use the device simply as an air circulator. Use this function to dry the interior of the indoor
unit at the end of summer.
Press the FUNCTION selector so that the display indicates
   (FAN).
Press the    (FAN SPEED) button.
(HI) : The strongest air blow.
 (MED) : Fan speed slow.
 (LOW) : Fan speed slower.
 (SILENT) : Fan speed ultra slower.
Pressthe   (START/STOP) button.Fan operationstarts with
a beep. Press the button again to stop operation.
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2
START
STOP