● Auto fan runs in the dead zone at low speed during cooling only (P029 = 2).
During heating, the fan does not run in the dead zone.
● Auto or manual fan does not run in the dead zone (P029 = 3)
● Auto or manual fan runs in the dead zone at low speed during heating and
cooling (P029 = 4)
● Auto or manual fan runs in the dead zone at low speed during cooling only
(P029 = 5).
During heating, the fan does not run in the dead zone.
When the fan does not run in the dead zone (P029 = 0), " Periodic fan kick
Comfort" (P363) function can be enabled to periodically ventilate the room.
When the fan starts from standstill, it starts at speed 3 for 1 second to ensure safe
fan motor start by overcoming inertia and friction (selected via P361).
In the heating sequence, when the return water temperature exceeds 30 °C
(factory setting, P366), fan operation is enabled even if the fan start delay time
(P365) is not reached.
The universal input "coil temperature" (P150, P153 or P155 = 12) is required to
activate this function.
When the electric heater is switched off, the fan overruns for 60 seconds (P352) to
avoid overtemperature of the electric heater or prevent the thermal cutout from
responding.
Fan failure
In case of fan failure, the thermostat cannot protect the electric heater against
overtemperature. For this reason, the electric heater must have a separate safety
device (thermal cutout).
The "Clean fan filter reminder" function counts the fan operating hours and displays
message "FIL " to remind users to change/clean the fan filter as soon as the
threshold is reached. This does not impact thermostat, which continues to run
normally. The function is set via P501 (default = Off (0)).
The "Clean filter reminder" is reset when the operating mode is manually set to
Protection and back.
In Auto mode, the default fan mode is automatic. The fan mode can be changed to
Manual by pressing the FAN button. The fan returns to automatic mode after each
switchover from Comfort to Economy, and vice versa.
To allow the heating/cooling coil to reach its temperature, fan start can be delayed
by a time period set via P365.
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