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5.4.1.3 Heating/Cooling mode
In
Heating/Cooling mode, the appliance cools the water when the sensor temperature is higher than the setpoint
temperature increased by the temperature differential of the Heating/Cooling mode (parameter F15)
. The appliance
stops cooling the water when the temperature is below the setpoint temperature.
The appliance heats the water when the sensor temperature is lower than the setpoint temperature reduced by the
temperature differential of the Heating/Cooling mode (parameter F15). The appliance stops cooling the water when the
temperature is above the setpoint temperature.
5.4.2 I Operating principles of the defrosting process
•
The defrosting process is activated when the outside air temperature drops below 3°C. If the water
temperature is below 4°C, the appliance stops or switches to standby and activates the filtration pump so
that water does not freeze in the pipes.
In Heating mode, the regulator controls the evaporator temperature and starts the defrosting process based on
the appliance's operating time at low temperatures (taking into account the advanced parameters "Start defrosting
temperature" and "Start defrosting duration", see § “5.3 I Advanced setting parameters (accessible by a qualified
technician)”, settings F31 and F33). If the evaporator temperature rises above the "Start defrosting temperature"
during the controller's timing phase, the controller resets to zero. The controller restarts timing when the evaporator
temperature drops below the "Start defrosting temperature".
The defrosting controller thus measures the appliance's operating time at low temperature.
For pumps equipped with 2 compressors, defrosting will only start if both circuits fulfil defrosting conditions.
If the outside air temperature is higher than the "Stop defrosting temperature" (F32), the controller stops the defrosting
process. If the defrosting time is greater than the "Maximum defrosting duration", the controller will stop the defrosting
process.
When circuit 1 fulfils the conditions for stopping the defrosting cycle, compressor 1 waits until compressor 2 fulfils the
same conditions. As soon as compressor 2 stops, the Heating mode is restarted in both circuits (after a delay time which
has been set between the two compressors).
The operating sequence is shown below.
If both evaporator temperature sensors are faulty, the system checks the outside air temperature. If this
temperature is lower than F35 and the appliance's operating time is longer than the Start defrosting time,
the pump starts defrosting and subsequently stops this process when the defrosting time overtakes the
maximum defrosting time.
EN
Summary of Contents for WH000456
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