Hitachi RAC-25YH4, Service Manual, Page: 12 / 121

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Signal emitting window/transmission sign
Point this window toward the indoor unit when controlling it.
The transmission sign blinks when a signal is sent.
●
Display
This indicates the room temperature selected, current time, timer status,
function and intensity of circulation selected.
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START/STOP button
Press this button to start operation. Press it again to stop operation.
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AUTO SWING button
Controls the angle of the horizontal air deflector.
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FAN SPEED selector
This determines the fan speed. Every time you press this button, the intensity of
circulation will change from
(AUTO) to (HI) to (MED) to (LOW).
(This button allows selecting the optimal or preferred fan speed for each
operation mode.)
●
SLEEP button
Use this button to set the sleep timer.
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TEMPERATURE buttons
Use these buttons to raise or lower the temperature setting. (Keep pressed, and
the value will change more quickly.)
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TIME button
Use this button to set and check the time and date.
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RESET button
Press this button after the batteries are replaced or when some irregular
operation is found.
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FUNCTION selector
Use this button to select the operating mode. Every time you press it, the mode
will change from
(AUTO) to (HEAT) to (DEHUMIDIFY) to (COOL) and
to (FAN) cyclically.
●
FAN SPEED selector
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AUTO SWING button
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TIMER control
Use these buttons to set the timer.
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OFF-TIMER button Select the turn OFF time.
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ON-TIMER button Select the turn ON time.
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RESERVE button Time setting reservation.
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CANCEL button Cancel time reservation.
NAMES AND FUNCTIONS OF EACH PART
REMOTE CONTROLLER
• This controls the operation of the indoor unit.
The range of control is about 7 meters. If indoor lighting is controlled electronically, the range of
control may be shorter, in some cases, the control signal may not be received.
This unit can be fixed on a wall using the fixture provided. Before fixing it, make sure the indoor unit
can be controlled from the remote controller.
• Handle the remote controller with care.
Dropping it or getting it wet may compromise its signal transmission capability.
• After new batteries are inserted into the remote controller, the unit will initially require approximately
10 seconds to respond to commands and operate.
Precautions for Use
• Do not put the remote controller in the following places.
• In direct sunlight
• In the vicinity of a heater.
• Handle the remote controller carefully. Do not drop it on the floor, and
protect it from water.
• Once the outdoor unit stops, it will not restart for about 3 minutes (unless
you turn the power switch off and on or unplug the power cord and plug
it in again).
This is to protect the device and does not indicate a failure.
• If you press the FUNCTION selector button during operation, the device
may stop for about 3 minutes for protection.
AUTO
HEAT
DEHUMIDIFY
COOL
FAN
FAN SPEED
LOW
MED
HI
SLEEPING
STOP (CANCEL)
START (RESERVE)
START/STOP
TIME
TIMER SET
TIMER SELECTOR
ON TIMER
OFF TIMER
AUTO SWING
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