Hitachi RAC-10JH5, Instruction Manual

Page: 34 / 76

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UNDERSTANDING THE OPERATING MECHANISM
Air Purifying Operation
(Page 17)
Ŗ When the two way air exchange operation is configured during the air purifier operation, the fan speed operation
(heating, cooling and dehumidifying operation when the heating, cooling and dehumidifying of the device are combined)
is combined with the two way air exchange operation.
Two Way Air Exchange Operation
(Page 21)
Fresh Air In Operation
Ŗ When the air temperature outside the room is more than about 30°C or less than about 3°C, the fresh air in does not
operate to prevent dew condensation on the two way air exchange fan and hose and to save energy.
Ŗ If the difference in temperature between the inside and outside of the room is more than about 7°C, the fresh air in
does not operate to prevent dew condensation on the two way air exchange fan and hose, while cooling operation.
Ŗ
If the difference in temperature between the inside and outside of the room is more than about 22°C, the fresh air in
does not operate to prevent dew condensation on the two way air exchange fan and hose, while heating operation.
Ŗ When the above mentioned operations have stopped, the “Two Way Air Exchange” lamp on the indoor unit
indicators blinks (lights for 10 seconds/light off for 1 second).
Exhaust Operation
Ŗ When the temperature inside the room is more than about 43°C, the exhaust does not operate to protect the
exhaust fan from damage.
Ŗ When the above mentioned operation has stopped, the “Two Way Air Exchange” lamp on the indoor unit
indicators blinks (lights for 10 seconds/light off for 1 second).
Abnormal of Two Way Air Exchange Fan
Ŗ Two Way Air Exchange Fan is abnormal if the “Two Way Air Exchange” lamp of the indoor unit indicators blinks
(lights for 4 seconds/light off for 1 second) repeatedly.
In this case, all the functions can be operated except for the Two Way Air Exchange operation.
Sound of the Two Way Air Exchange Operation
These are just rough indications when the fresh air in and exhaust operate independently. In addition, the operating
volume of the air conditioning changes according to the mounting conditions.
If the air conditioning operation is configured at the same time, the volume of the operation sound becomes bigger.
Sleep Timer Operation
(Page 25)
Ŗ
If the remote controller never receive the signal when sleep timer is set, it does not start to operate even when
reaching the set time. Please confirm the sleep timer setting by the “beep” sound and the “TIMER” lamp on the indoor
unit.
Ŗ If the vertical deflector are configured to swing while the Sleep Timer is set, it will not swing when 1hr. More Timer
operates during cooling/dehumidifying or Sleep (7 hrs. Monitoring) operation during heating.
Ŗ When sleep timer setting, if the air conditioning operation (cooling, dehumidifying, heating) is configured in combination
with the fresh air in, exhaust and air purifier, 1 hr. More Timer of the cooling and dehumidifying operation or Sleep
(7 hrs. Monitoring) timer operation during heating only the air conditioning operation performs.
“HI” Fresh Air In About the same when cooling (Fan Speed: “HI”).
“MED” Fresh Air In About the same when cooling (Fan Speed: “MED”).
“LOW” Fresh Air In About the same when cooling (Fan Speed: “LOW”).
“HI” Exhaust About the same when cooling (Fan Speed: “HI”).
“MED” Exhaust About the same when cooling (Fan Speed: “MED”).
“LOW” Exhaust About the same when cooling (Fan Speed: “LOW”).
Type of operation Operating sound
WARNING
Ŗ
When the humidity inside the room is HIGH (more than 70%), do not use the fresh air in operation.
Dew condensation may be the cause of failure.