Hitachi RAF-25NH4 Données Techniques page 223

Q5
Air does not flow immediately after
operation is started.
Q6
Mold in the room cannot be inhibited
even after performing the air
conditioner drying operation.
Q7
The interior of the indoor unit seems
to be still damp even after performing
the air conditioner drying operation.
Q8
Even if the air conditioner drying is
performed using the remote controller
during the unit operation or timer
programming, the air conditioner drying
operation does not start.
Q9
The unit is operated after built-in
installation (behind the lattice door). It
turns off for a long time and the room
is not warmed(cooled).
Q10
Strange sound is occasionally heard
from the bottom air outlet.
A5
Preliminary operation is performed for one minute
when the power switch is turned on and heating
or dehumidifying is set. The operation lamp blinks
during this time for heating. This does not
indicate a fault.
A6
Air conditioner drying operation is to dry the
interior of the indoor unit to inhibit the growth of
mold. It is not to inhibit the mold growth in the
room.
A7
Condition of the interior of the indoor unit varies
depending on usage of the unit and condition of
the indoor unit. If it is not dried after the first try,
perform the drying more than one time for better
effect.
A8
To perform the air conditioner drying, stop the
unit operation or programming beforehand.
A9
Check to see if warm (cool) air is being short-
circuited behind the lattice door. A short-circuit is
likely to occur when the deflector position is not
appropriate, the lattice does not have a big
enough opening, and/or the unit is installed in the
inner part. Install the unit as near the lattice door
as possible.
A10
When the damper is switched, scrambing of air
will occur brtween the top and bottom outlets due
to the set fan speed during switching and filter
clogged state, which, may generate some sound.
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