Hitachi RAF-50FX8 Service Manual page 142

Q5
Air does not flow immediately after
operation is started.
Mold in the room cannot be inhibited even
Q6
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.
Air conditioner drying operation is to dry the interior of
A6
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 between 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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