Zehnder Rittling ComfoFond-L, Installation Manual, Page: 24 / 32

EN 20
Problem/Malfunction Indication Check / action
The pump does not run The EWT text is not visible on the
CC Ease or CC Luxe. Check the ComfoAir Luxe, the measured
outdoor temperature and the comfort temperature
setting.
The EWT text is visible on the CC
Ease or CC Luxe. Check the pump setting, the wiring and
connection points on the connector printed circuit
board of the ComfoAir Luxe
- The pump is defect if there is power on the clamps of
the
connector printed circuit board.
High intake temperature in
summer. The EWT text is not visible on the
CC Ease or CC Luxe. Lower the comfort temperature on the ComfoAir Luxe.
Little or no cooling or
heating capacity. The EWT text is visible on the CC
Ease or CC Luxe. Check the system pressure and the pump setting.
Little or no
supply air Filters clogged. Replace the filter.
Battery clogged. Clean the battery.
Too much noise Whistling noise
- Air escaping through crack
somewhere Seal the crack using insulating tape (not included).
Slurping noise
- Siphon is empty
- Siphon does not seal properly Fill the siphon, reconnect the siphon.
Condensation leak Condensation drain clogged. Clean both condensation drains
(at the top and bottom of the Comfofond-L).
Condensation on the pipes and/or
fluid and air connections. Insulate the connections and pipes.
Frost-free set up not achieved The Comfofond-L was not installed in accordance
with the installation requirements. Insulate the area
that accommodates the Comfofond-L or relocate the
Comfofond-L to a frost-free area.
High humidity Lower the humidity by ventilating the area. If the
humidity remains high, then relocate the Comfofond-L
to an area with a lower humidity or insulate the areas
where condensation forms.
7. Malfunctions
The Comfofond-L does not have a digital control
system that indicates malfunction codes.
The ComfoAir Luxe has a digital control system that
indicates malfunction codes. The ComfoAir Luxe
manual states what the malfunction codes mean
and how to rectify these malfunctions. A copy of this
manual can be obtained from Zehnder.
Not all malfunctions are displayed on the digital
control system of the ComfoAir Luxe, 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.