User Manual

21
 Observe the air inlet/outlet status of each indoor/outdoor air port. If the air flow and
direction of the indoor air port can be adjusted, adjust it to a proper status.
 Carefully check whether there is any abnormal noise in the ventilation system, and
observe whether the screws at the joints of all parts get loose and whether the
sealing effect of sealing strip is good.
 If no exception is found when the machine operates, it can be used normally. If
other engineering work is not completed yet indoors, do not use the product for
ventilation, lest indoor dust would block the air filter in the machine.
 If any exception is found, power off the unit and check all the parts again
according to the table below:
Phenomena Possible Cause Solution
The device cannot start
No power from the power
supply or wrong connection
of the power cord
Check the power supply and
power cord
Broken communication line
or wrong connection method
Check the connection wire from
the wired controller to the unit
Air inlet of the outdoor air
port is normal, but the air
flow of the indoor air port is
relatively small
The indoor duct leaks
Find the position where air leaks
and seal it
The filter is clogged Clean or replace the filter
Abnormal sound is found at
the air port
The air port gets loose. Fasten the air port joint again
4. Maintenance
Maintaining the HRV core
 If the device is used for a long time, the device filter will be clogged with dirt, thus
reducing the fresh air volume and generating noise.
 Regularly clean and replace the filter according to dirt and dust attached to it or
the suggested replacement cycle so as to protect the HRV core; regularly clean
and replace the HRV core according to dirt and dust attached to it. During
maintenance, disconnect the circuit to ensure that the fresh air handling unit is
disconnected from the power supply before removing the access panel.