Service Call Q&A - Hitachi RAF-50RPA Service Manual

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DEHUMIDIFYING MODE
Q1
Sound of running water is heard from
indoor unit during dehumidifying.
Q2 Cold air comes out during a
dehumidifying operation.
Q 3
The operation does not stop even by
setting the temperature higher than
room temperature on the remote
controller.
HEATING MODE
Q1
The circulation stops
occasionally during Heating
mode.
Q2
When the fan speed is set at
HIGH or MED, the flow is
actually Weak.
Q3
Heating operation stops while
the temperature is preset at
"30".
Q4
When the heating operation is
started, the indoor fan not start.
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A1
Normal sound when refrigerant flows in pipe.
A2
To improve the dehumidification efficiency performs
quiet fan operation. Therefore the air is cold and it is
not a malfunction.
A 3
It sets to perform dehumidifying operation by setting
the temperature slightly lower than remote controller
setting.
A1
It occurs during defrosting
Wait for 5 -10 minutes until
the condenser is defrosted.
A2 At the beginning of heating,
the fan speed remains
LOW for 30 seconds.
If HIGH is elected, it
switches to LOW and again
to MED after additional
30 seconds.
A3
If temperature is high in the
outdoor, heating operation
may stop to protect internal
devices.
A4
This is because the
preheating device is
working. lt will not start to
drive the fan until the
refrigerating cycle warms
up and warm air blows.
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