Malfunctions; Technical Specifications - Zehnder ComfoFond-L Q ST Série Manuel De L'installateur

7. Malfunctions

The ComfoFond-L Q does not have a digital control
system that indicates malfunction codes.
The ventilation unit has a display 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

8 Technical specifications

Heating capacity (water based)
� max 350 m /h
3 1
� max 450 m /h
3 3
� max 600 m /h
3 5
Cooling capacity (water based)
� max 350 m /h
3 2
� max 450 m /h
3 4
� max 600 m /h
3 6
Maximum sound power level
Maximum power consumption
Indication
The STATE of the SUBSOIL HEAT
EXCH. on the display of the
ventilation system is OFF.
(see MENU > STATUS > SUBSOIL
HEAT EXCH. > STATE)
The STATE of the SUBSOIL HEAT
EXCH. on the display of the
ventilation system is ON.
(see MENU > STATUS > SUBSOIL
HEAT EXCH. > STATE)
The STATE of the SUBSOIL HEAT
EXCH. on the display of the
ventilation system is OFF.
(see MENU > STATUS > SUBSOIL
HEAT EXCH. > STATE)
The STATE of the SUBSOIL HEAT
EXCH. on the display of the
ventilation system is ON.
(see MENU > STATUS > SUBSOIL
HEAT EXCH. > STATE)
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
Electrical data
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
display.
Check / action
Check the ventilation unit, the measured outside temperature and the
temperature profile setting.
Check the pump setting, the wiring and connection points on the
Option Box of the ventilation unit
- The pump has a defect if there is power on the clamps of the Option
Box.
Lower the temperature profile setting 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 Q).
Insulate the connections and pipes.
The ComfoFond-L Q was not installed in accordance with the
installation requirements. Insulate the area that accommodates the
ComfoFond-L Q or relocate the ComfoFond-L Q to a frost-free area.
Lower the humidity by ventilating the area. If the humidity remains
high, then relocate the ComfoFond-L Q to an area with a lower
humidity or insulate the areas where condensation forms.
Performance
1864 W
2387 W
2776 W
1961 W
2631 W
2930 W
40 dB(A)
0,58 A
27 - EN