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

5.2 Malfunctions

The following parameters are defined in the heat-recovery units menu in order to assess the ComfoCool Q600s
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;
Heat-recovery unit displays:
"CCOOL_COMPRESSOR
ERROR"
Compressor on;
Heat-recovery unit displays:
"CCOOL_COMPRESSOR
ERROR"
Compressor on
Compressor off;
Heat-recovery unit displays:
"DANGER! CCOOL
OVERHEATING!"
Heat-recovery unit displays:
"CCOOL_TEMP ERROR"
Heat-recovery unit displays:
"TEMP_SENSOR_SUP
ERROR"
No cooling Heat-recovery unit displays:
"CCOOL_CONNECT ERROR"
Heat-recovery unit displays:
"FAN_SUP ERROR"
Heat-recovery unit displays:
"FAN_EHA ERROR"
Irregular none
ventilation

5.3 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
EN - 28
to 30˚C.
Check / action
Check the systems settings.
■ Is the ComfoCool Q600 registered with the heat-recovery unit? Check this in the heat-recovery
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 ComfoCool Q600.
Replace the PCB of the heat-recovery unit.
■ Can the ComfoCool Q600 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 heat-recovery unit ventilation set to Absent? Then the ComfoCool Q600 will not be activated.
■ Is it autumn or winter? The ComfoCool Q600 only activates if the heat-recovery 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 heat-recovery 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 heat-recovery unit.
Check that the mains cable is properly connected to the ComfoCool Q600. Check the fuse on the
ComfoCool Q600s 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 heat-
recovery units 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 supply temperature sensor is properly connected. Measure the resistance of the sensor
(approx. 10 kOhm at 25˚C). Replace the sensor.
The heat-recovery units supply air sensor does not emit a signal. Please refer to the heat-recovery
unit manual for a solution to this problem.
The ComfoCool Q600 is not sending a signal to the heat-recovery unit. Check the data cable
connections between the ComfoCool Q600 and the heat-recovery unit.
The supply fan is deactivated or fails to give a signal. Please refer to the heat-recovery unit manual for
a solution to this problem.
The exhaust fan is deactivated or fails to give a signal. Please refer to the heat-recovery 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.

5.4 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 ComfoCool Q600 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
.