Malfunctions - Zehnder ComfoCool Manuel De L'installateur

5.2. Malfunctions

The following parameters are defi ned 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/ Indications
malfunction
No cooling, but still None
ventilation
No voltage
Compressor off;
CC displays: C2".
Compressor on;
CC displays: "C2".
Compressor on
Compressor off;
CC displays: "C1"
CC displays: "C3"
CC displays: "C4"
CC displays: "A2"
Check / action
Check the system's settings.
• Is the ComfoCool registered by the ComfoControl Luxe? Check this in
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.
• Can the ComfoCool be activated? In the menu for setting the comfort tem-
perature, you will fi nd a button displaying "ComfoCool Auto" or "Comfo-
Cool off". Ensure that this button is set to "ComfoCool Auto".
• Are the supply and exhaust valves activated?
• Is the ComfoAir ventilation set to Absent? Then the ComfoCool will not be
activated.
• Is it autumn or winter? The ComfoCool only activates if the comfort tem-
perature is set to "COOL".
• 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-
vated unless the comfort temperature is set to "COOL".
• Has the compressor just been deactivated? For safety reasons, the unit
waits fi ve minutes before reactivating the compressor.
• The unit is fi tted with a proportional integrated control system based on T2
(supply temperature from the heat-recovery unit)
When voltage is supplied to the control PCB, a red LED fl ashes 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.
Check whether the compressor switch on the PCB is working. Check the over-
pressure switch. Replace the cooling skid.
Check whether there is enough coolant in the system. Check the cooling circuit
for leakages. Replace the cooling skid.
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.
The condenser has overheated. There is insuffi cient air to cool the condenser.
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.
Check the condenser temperature sensor is properly connected. Measure the
resistance of the sensor (approx. 10 kOhm at 25˚C). Replace the sensor.
Check the blow-in temperature sensor is properly connected. Measure the
resistance of the sensor (approx. 10 kOhm at 25˚C). Replace the sensor.
The ComfoAir's blow-in air sensor does not emit a signal. Please refer to the
ComfoAir manual for a solution to this problem.
17 - EN