Malfunctions - Zehnder ComfoFond-L Eco 350 L Manuel De L'installateur

7. Malfunctions

The ComfoFond-L Eco does not have a digital
control system that indicates malfunction codes.
The ventilation unit has a digital control system that
indicates malfunction codes. The ventilation unit
manual states what the malfunction codes mean and
how to rectify these malfunctions.
Problem/Malfunction
The pump does not run
High intake temperature in
summer.
Little or no cooling or
heating capacity.
Little or no
supply air
Too much noise
Condensation leak
Indication
The EWT text is not visible on the
digital controls of the ventilation
system.
The EWT text is visible on the
digital controls of the ventilation
system.
The EWT text is not visible on the
digital controls of the ventilation
system.
The EWT text is visible on the
digital controls of the ventilation
system.
Filters clogged.
Battery clogged.
Whistling noise
- Air escaping through crack
somewhere
Slurping noise
- Siphon is empty
- U bend is not sealed properly
Condensation drain clogged.
Condensation on the pipes and/or
brine and air connections.
Frost-free set up not achieved
High humidity
Not all malfunctions are displayed on the digital
control system of the ventilation unit, even though
there may be malfunctions (or problems). Below is a
list of the malfunctions (or problems) that may occur
without a malfunction code being displayed on the
digital control system.
Check / action
Check the ventilation unit, the measured
outside temperature and the comfort temperature setting.
Check the pump setting, the wiring and
connection points on the connector printed circuit board of the
ventilation unit
- The pump has a defect if there is power on the clamps of the
connector printed circuit board.
Lower the P63 temperature on the ventilation unit.
Check the system pressure and the pump setting.
Replace the filter.
Clean the battery.
Seal the crack using insulating tape (not included).
Fill the siphon, reconnect the siphon.
Clean both condensation drains
(at the top and bottom of the ComfoFond-L Eco).
Insulate the connections and pipes.
The ComfoFond-L Eco was not installed in accordance with the
installation requirements. Insulate the area that accommodates the
ComfoFond-L Eco or relocate the ComfoFond-L Eco to a frost-free
area.
Lower the humidity by ventilating the area. If the humidity remains
high, then relocate the ComfoFond-L Eco to an area with a lower
humidity or insulate the areas where condensation forms.
27 - EN