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English
• Use city water or clean water and take steps to prevent
condensation from forming. (VKM-GAMV1 series only)
•
The life of humidifier become shorter when the supply
water is hard water. (VKM-GAMV1 series only)
Use a water softener.
•
Do not install the remote controller where the indoor
temperature and humidity, respectively, are out of the
range of 0-35°C and RH 40-80%.
This may cause malfunction.
•
Do not install the remote controller where direct sun-
light may fall on it.
This may cause discoloration or deformation.
NOTE
• When the fan motor fails, the remote controller does not dis-
play any error code.
Usage under that status will lead to insufficient ventilation.
The air supply and exhaust fans should be checked once
every one or two months.
You can make a simple check such as below way.
To check the wind flow, hold a bar of which the end has a
string or other similar lightweight item over the supply grille
and exhaust grille.
• When the solenoid valve fails, the remote controller does not
display any error code.
Usage under that status will lead to insufficient humidification
and increased tap water consumption.
The solenoid valve should be checked at the beginning of the
heating season. <VKM-GAMV1 series only>
4
MAINTENANCE
(for a qualified service person only)
ONLY A QUALIFIED SERVICE PERSON IS ALLOWED TO
PERFORM MAINTENANCE
DO NOT CHECK OPENING INSIDE THE UNIT BY YOURSELF.
WARNING
• BEFORE OBTAINING ACCESS TO TERMINAL DEVICES,
ALL POWER SUPPLY CIRCUITS MUST BE INTERRUPTED.
• To clean the HRV, or maintenance be sure to stop operation,
and turn the power switch off. It may cause electrical shock
and it is very dangerous to touch the rotating part.
• Do not wash the HRV with water.
Doing so may result in an electric shock.
CAUTION
• Use gloves when cleaning.
Cleaning without gloves may cause injury.
• Watch your step.
Use caution, as this requires working in high places.
• Do not use benzene or thinner to clean the outside surfaces
of the air conditioner.
This may cause cracks, discoloration, or machine trouble.
4.1 HOW TO CLEAN THE AIR FILTER
Clean the air filter when the display shows “
” (TIME TO
CLEAN AIR FILTER).
It will display that it will operate for a set amount of time.
AT LEAST ONCE EVERY YEARS (FOR GENERAL OFFICE USE)
(CLEAN THE MORE FREQUENTLY IF NECESSARY.)
• Increase the frequency of cleaning if the unit is installed in a
room where the air is etermely contaminated.
• If the dirt becomes impossible to clean, change the air filter
(Air filter for exchange is optional).
(1) Detach the maintenance cover.
Go into ceiling through the inspection hatch, remove binding
metal of maintenance cover and take it off.
(Refer to figure 8-1)
(2) Detach the air filter.
Take out from the heat exchange elements.
(Refer to figure 8-2)
(3) Clean the air filter.
(Refer to figure 9)
Use vacuum cleaner A) or wash the air filter with water B).
A) Using a vacuum cleaner
B) Washing with water
When the air filter is very dirty, use soft brush and neau-
tral detergent.
After cleaning, remove water and dry in the shade.
NOTE
• Do not wash the air filter with hot water of more than 50°C,
as doing so may result in discoloration and/or deformation.
• Do not expose the air filter to fire, as doing so may result in
burning.
• Do not use gasoline, thinner, or other organic solvents.
This may cause discoloration or deformation.
(4) Fix the air filter.
If the air filter is washed, remove water completely and allow
to dry for 20 to 30 minutes in the shade. When dried com-
pletely, install the air filter back in place.
(Refer to figure 10)
NOTE
• Be sure to install the air filter after servicing.
(Missing air filter causes clogged heat exchange element.)
The air filter is an optional item and the replacement is
available.
(5) Install the maintenance cover.
Refer to page 11 (4.1, (1)).
∗
Consult your dealer if you want to change the time setting
for when the filter sign goes on.
CAUTION
•
Always use the air filter.
If the air filter is not used, heat exchange elements will be clogged,
possibly causing poor performance and subsequent failure.
4.2
HOW TO CLEAN THE HEAT EXCHANGE ELEMENT
AT LEAST ONCE EVERY TWO YEARS
(FOR GENERAL OFFICE USE)
(CLEAN THE ELEMENT MORE FREQUENTLY IF NECES-
SARY.)
WARNING
•
Please exchange the heat exchange element if you find
that the knob of the heat exchange element is damaged
or is deteriorated when cleaning it.
There is falling danger.
(1) Detach the maintenance cover.
Refer to page 11 (4.1, (1)).
(2) Detach the air filter.
Refer to page 11 (4.1, (2)).
(3) Take out the heat exchange elements.
Pull out the air filter and then pull out the two heat
exchanger elements.
(Refer to figure 11)
For remote controllers which display the filter sign, turn on the
power after maintenance, and press the filter sign reset button.
01_EN_3P130767-3G.fm Page 11 Monday, March 5, 2007 10:05 AM
