Service Parts; Product End Of Life; Malfunctions - Zehnder ComfoCool Q600 Manuel De L'installateur

6.2 Malfunctions

The following parameters are defined in the ventilation units menu in order to assess the units performance:
> MENU > STATUS > COMFOCOOL > CONDENSER TEMP: Current temperature of condenser. Criterion: 0˚C to 58˚C.
> MENU > STATUS > COMFOCOOL > STATE: Current temperature of supply air and ComfoCool Q600 mode. Criterion 8˚C
Otherwise consult the table below:
Problem/ Indications
malfunction
No air None
temperation, but
still ventilation
No voltage
Compressor off;
Ventilation unit displays:
"CCOOL_COMPRESSOR
ERROR"
Compressor on;
Ventilation unit displays:
"CCOOL_COMPRESSOR
ERROR"
Compressor on
Compressor off;
Ventilation unit displays:
COMFOCOOL_HEAT ERROR
Ventilation unit displays:
"CCOOL_TEMP ERROR"
Ventilation unit displays:
"TEMP_SENSOR_SUP
ERROR"
No cooling Ventilation unit displays:
"CCOOL_CONNECT ERROR"
Ventilation unit displays:
"FAN_SUP ERROR"
Ventilation unit displays:
"FAN_EHA ERROR"
Irregular none
ventilation

6.3 Service parts

Part
ComfoCool Q600 Skid
ComfoCool Q600 PCB
ComfoCool Q600 data cable
NTC supply sensor
NTC condenser sensor
Overpressure switch
Support frame
Adaptor set
to 30˚C.
Check / action
Check the systems settings.
■ Is the unit registered with the ventilation unit? Check this in the ventilation units menu. If
registration has been completed successfully, then the menu COMFOCOOL is visible in the
STATUS menu. Check the ComfoNet cable. Replace the PCB of the unit. Replace the PCB of the
ventilation unit.
■ Can the unit be activated? In the TASK MENU you will see an option COMFOCOOL that can be set
to either OFF or AUTO. Ensure that this menu is set to "AUTO".
■ Are the supply and exhaust fans activated?
■ Is the ventilation unit ventilation set to Absent? Then the unit will not be activated.
■ Is it autumn or winter? The unit only activates if the ventilation unit is in the summer mode.
■ Is the temperature profile set low enough?
■ Is the temperature outside below 12˚C?
■ Does the display show a status or malfunction alert?
■ Is the ventilation units bypass open?
■ Has the compressor just been deactivated? For safety reasons, the unit waits five minutes before
reactivating the compressor.
■ The unit is fitted with a control system based on the return temperature of the ventilation unit.
Check that the mains cable is properly connected to the unit. Check the fuse on the units PCB.
Replace the PCB.
Check whether the compressor switch on the PCB is working. Check the overpressure switch.
Replace the cooling skid.
Check whether there is enough coolant in the system. Check the refrigerant 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 insufficient air to cool the condenser. Check the ventilation
units settings. Reset the error after 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 supply temperature sensor is properly connected. Measure the resistance of the sensor
(approx. 10 kOhm at 25˚C). Replace the sensor.
The ventilation units supply air sensor does not emit a signal. Please refer to the ventilation unit
manual for a solution to this problem.
The unit is not sending a signal to the ventilation unit. Check the data cable connections between the
unit and the ventilation unit.
The supply fan is deactivated or fails to give a signal. Please refer to the ventilation unit manual for a
solution to this problem.
The exhaust fan is deactivated or fails to give a signal. Please refer to the ventilation unit manual for a
solution to this problem.
Check whether the ventilation level is high enough. Check that the flow rate is set-up properly. At
least 200m3/h is required for effective operation. If the flow rate is set up too low, then the unit will
increase it briefly to keep the condenser temperature at a safe level.

6.4 Product end of life

When scrapping the unit or the cooling skid, contact
your local authority to enquire what the possibilities are
for recycling or processing. The unit contains coolant
R134a. It is essential that the coolant is disposed of in
an environmentally friendly manner. If not disposed of
properly, the contribution to greenhouse gas emissions of
the volume of coolant in this system equals 700kg CO .
2
19 - EN