M-WRG
User manual
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Meltem Wärmerückgewinnung GmbH & Co.KG
Am Hartholz 4 D-82239 Alling info@meltem.com www.meltem.com
5. Trouble shooting
Problem
Reason
Solution
M-WRG ventilation unit does not
work
Installation error. Power switch,
motor or main control is/are
defective.
Let a certified electrician test the
connecting wires
Air flaps do not open once the
M-WRG ventilation unit is
switched ON
If the M-WRG ventilation unit is
not operated for a longer interval
of time or operated for the first
time, the motor may not receive
power from the electronic wiring.
Air flaps may be clogged (e.g.
dirt, polystyrene, plaster, etc)
The M-WRG ventilation unit
should be switched ON and OFF
again by the operator
Remove any clogging material
(remove cover to do so, User
manual p.7)
M-WRG ventilation unit starts to
beep in intervals
The M-WRG ventilation unit
signals a soon to be done filter
replacement
Replace the filters.
(User manual p.7)
M-WRG ventilation unit does not
react to the remote control
Check the batteries
Replace batteries if necessary
Display malfunction
Software fault
Unplug the M-WRG ventilation
unit for approximately 30
seconds and then switch it ON
again
6. Antifreeze protection
In of case low exterior temperatures the M-WRG ventilation unit will automatically switch to the antifreeze protection
mode. During the winter season, it is recommended to ventilate the room daily for 10 minutes at the highest
ventilation rate (III), in order to avoid any condensate buildup inside the M-WRG ventilation unit.
7. Cleaning the M-WRG ventilation unit
The M-WRG ventilation unit is made of high quality synthetic material and only needs little cleaning. From time to
time we recommend cleaning the surface of the unit with a damp cloth. In order to preserve the parts we
recommend only using mild cleaning detergents. You may also use special synthetic cleaning detergents in case of
the occurrence of more resistant dirt.
Caution! Never use cleaning detergents that contain acids or corrosives! Never use a high pressure or
steam cleaner!