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5-5
IF THE SYSTEM DOES NOT PROPERLY
OPERATE EXCEPT FOR THE ABOVE
MENTIONED CASE, AND NONE OF THE ABOVE
MENTIONED MALFUNCTIONS IS EVIDENT,
CONTACT YOUR DEALER, AND REQUEST FOR
INVESTIGATION THE SYSTEM ACCORDING TO
THE FOLLOWING PROCEDURES BY A
QUALIFIED SERVICE PERSON
The following malfunctions must be cheched by a qualified
service person. Do not check by yourself.
• The unit does not operate at all.
a. Check if there is a power failure.
After power has been restored, start operation again.
b. Check if the fuse has blown.
Change the fuse.
c. Check if breaker has worked.
Contact your dealer.
d. Are there any problems with the power or wiring?
Inspect the power and wiring.
e. Are there any problems with the fan unit?
Inspect the fan motor and fan.
• Amount of discharged air is small and the discharging
sound is high.
a. Check if the air filter and heat exchange element are
clogged. (Check both SA and RA air filter. Check both
sides of elements.)
Clean the air filter and heat exchange element.
• Amount of discharged air is large and so is the sound.
a. Check if the air filter and heat exchange element are not
installed.
Install the air filter and heat exchange element.
6.
AFTER-SALES SERVICE
After-sales service:
WARNING
• Do not modify the unit.
This may cause electric shock or fire.
• Do not disassemble or repair the unit.
This may cause electric shock or fire.
Contact your dealer.
• Do not remove or reinstall the unit by yourself.
Incomplete installation may cause a water leakage electric
shock and fire.
Contact your dealer.
When asking your dealer to repair, inform related
staff of the details as follows:
• Shipping date and installation date:
• Malfunction:
Inform the staff of the defective details.
(Malfunction code being displayed on the remote
controller.)
• Name, address, telephone number
Repair where the warranty term is expired
Contact your dealer. If necessary to repair, pay service is
available.
Minimum storage period of important parts
Even after a certain type of the HRV unit is discontinued, we
have the related important parts in stock for 6 years at least.
The important parts indicate parts essential to operate the
HRV unit.
English
Recommendations for maintenance and inspection
Since dust collects after using the unit for several years, the
performance will be deteriorated to some extent.
Taking apart and cleaning inside require technical expertise,
so we recommend entering a maintenance and inspection
contract (at a cost) separate from normal maintenance.
Recommended inspection and maintenance cycles
[Note: The maintenance cycle is not the same as
the warranty period.]
Table 1 assumes the following usage conditions.
• Normal use without frequent starting and stopping of the
machine.
(Although it varies with the model, we recommend not start-
ing and stopping the machine more than 6 times/hour for
normal use.)
• Operation of the product is assumed to be 10 hours/day,
2500 hours/year.
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