Malfunctions - Zehnder ComfoAir 350 Luxe Manuel De L'utilisateur

5.2. Malfunctions

The following parameters are defined in the ComfoControl Luxe's installation menu in order to assess the ComfoCool's per-
formance:
P42 Current temperature of condenser. Criterion: 0˚C to 58˚C.
P43 Current temperature of supply air. Criterion 8˚C to 30˚C.
Otherwise consult the table below:
Problem/
malfunction
No cooling, but still
ventilation
EN - 29
Indications Check / action
None Check the system's settings.
■ Is the ComfoCool registered by the ComfoControl Luxe? Check this in
■ Can the ComfoCool be activated? In the menu for setting the comfort tem-
■ Are the supply and exhaust valves activated?
■ Is the ComfoAir ventilation set to Absent? Then the ComfoCool will not be
■ Is it autumn or winter? The ComfoCool only activates if the comfort tem-
■ Is the comfort temperature set low enough?
■ Is the temperature outside below 12˚C?
■ Does the display show a status or malfunction alert?
■ Is the heat-recovery unit's bypass open? The compressor will not be acti-
■ Has the compressor just been deactivated? For safety reasons, the unit
■ The unit is fitted with a proportional integrated control system based on T2
No voltage When voltage is supplied to the control PCB, a red LED flashes on the PCB.
Check that the mains cable is properly connected to the ComfoCool. Check the
fuse on the ComfoCool's PCB. Replace the PCB.
Compressor off; Check whether the compressor switch on the PCB is working. Check the over-
CC displays: C2". pressure switch. Replace the cooling skid.
Compressor on; Check whether there is enough coolant in the system. Check the cooling circuit
CC displays: "C2". for leakages. Replace the cooling skid.
Compressor on Check whether the supply and exhaust ducts are insulated. Check whether
the unit produces condensation. Check that the condenser gets hot and the
evaporator cold. Replace the cooling skid.
Compressor off; The condenser has overheated. There is insufficient air to cool the condenser.
CC displays: "C1" Check the heat-recovery unit's settings. The unit waits until the temperature of
the condenser has fallen adequately. Check after a few minutes whether the
system has reactivated.
CC displays: "C3" Check the condenser temperature sensor is properly connected. Measure the
resistance of the sensor (approx. 10 kOhm at 25˚C). Replace the sensor.
CC displays: "C4" Check the blow-in temperature sensor is properly connected. Measure the
resistance of the sensor (approx. 10 kOhm at 25˚C). Replace the sensor.
CC displays: "A2" The ComfoAir's blow-in air sensor does not emit a signal. Please refer to the
ComfoAir manual for a solution to this problem.
the ComfoControl Luxe's system status screen. The comfort temperature
set-up menu also indicates whether the ComfoCool has been registered.
If registration has been completed successfully, then the button "Comfo-
Cool OFF/ ComfoCool AUTO" will be displayed in this menu. Disconnect
the ComfoCool and the heat-recovery unit from the mains. Connect the
ComfoCool's mains supply then connect the ComfoAir's mains supply.
perature, you will find a button displaying "ComfoCool Auto" or "Comfo-
Cool off". Ensure that this button is set to "ComfoCool Auto".
activated.
perature is set to "COOL".
vated unless the comfort temperature is set to "COOL".
waits five minutes before reactivating the compressor.
(supply temperature from the heat-recovery unit)