Hitachi R-WB640VRU0 Instruction Manual page 14

Troubleshooting
This is not a malfunction of the refrigerator:
Problem
Annoying sound is generated
by the refrigerator.
Operation sound lasts long.
Operation sound sometimes
becomes louder.
There is something strange with the Vacuum compartment.
Problem
In case of any of these
events.
・・・
It is not known whether it is in
the vacuum state or not.
The Handle cannot be locked.
There is shaking "Bu Bu"
sound from around
Vacuum Compartment.
There are dews or water
around the door or
inside Vacuum Compartment.
Things stored in Vacuum
Compartment are frozen.
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Things to check
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Things to check
● Is the Handle up?
● Has the Handle been pushed down to the end ● If not, there is no vacuum. Push the Vacuum Box Case inside
already?
compartment
● Are Vacuum gasket and Gasket ● If they are, clean them by wiping the stain out.
receiver dirty?
compartment
● Is Vacuum gasket or vacuum
valve (blue) detached or loose.
Vacuum valve
(blue)
● Is there any bag that contains food or stain or
or debris or trash in or around Vacuum
compartment
gasket and Gasket receiver?
Thread
Trash
● It is because the side of the gasket get
attached together in case spill of food.
● Has the Vacuum Compartment or R door been ● Since the Vacuum Pump is in the status of readiness for work,
opened/closed?
● If the is the "Whoosh..."sound during the
opening, it is normal.
● Is there anything stored in the Packing or the
inmost side of the Vacuum Compartment?
● The sound of Pump creating the vacuum state.
● If the sound or the shaking happens often,
there may be something at the door or the
packing may be dirty.
● Moisture in food and air can form dew inside
the Vacuum Compartment as it is completely
closed.
● Is there any vegetable that is vulnerable to
low temperature such as cucumber or tomato
inside?
● You may feel that the operation sound is loud because the
compressor operates in high-speed under the
following conditions: the refrigerator does not cool fully
on the occasion such as using it for the first time,
opening/closing the door frequently, the surrounding
temperature is high.
The sound becomes more quiet after cooling fully.
The compressor operates at low speed at night, or during
long vacations or absence.
●
It is because the compressor operates in low-speed for
conserving energy
● It is because the system changes the operating power of
he refrigerator according to the temperature change.
● Push Handle down to the proper position.
to the end and push the handle down to the proper position.
● Deliberately attach Vacuum
vacuum valve.
● If there is any plastic bag that contains things inside, remove it.
If the packings are attached to each other, the vacuum
property will be lost.
● If the sides of Packing stick to each other, put them apart.
If packing is dirty, clean it.
Flank
Packing side
the absence of the "Whoosh..." sound is not unusual.
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● If there is, remove that thing.
● There is nothing wrong.
● If there is plastic bag, remove it and clean the dirty Packing.
● Anything that contains a lot of water should be wrapped or
covered. If there are dews or water, wipe them with a piece of
cloth soaked in warm water.
● Check the vegetables that are vulnerable to low temperature
and move them to vegetable compartment.
Instructions
Instructions
compartment
gasket and
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