Eliwell EWCM 4120, Руководство пользователя, Страница: 43 / 75

Fn06 Fn04
Cooling Heating
ON
OFF
Setpoint
(Fn00)
Fn06 Fn04
Setpoint
(Fn00)
Regolator
probe
Fan
Inverter
Enabling
The digital inverter enabling output is activated in each case in which the analogue output has a value other than 0%.
The above drawing represents only the nominal case in which the cut-off hysteresis is enabled at the minimum.
Inverter preventilation (cold mode only)
If parameter Fn10 =1 (if the compressor is OFF, the fan is OFF) and Fn15 <>0, the preventilation is also active. Before
the compressor is switched on, the fan is switched on for a time equal to Fn15; the fan speed is proportional to the
value of the regulation probe. However, if during this period the regulator requests the switching off of the fan, the
fan will be piloted at the minimum speed set by parameter Fn20. This is to avoid the compressor switching on when
the condensation probe values are excessively high. If, at the end the preventilation, the regulator does not request
fans, the fan is switched off immediately. The preventilation is reset if the right parameter conditions are present and
if the inlet request is zeroed and then returns (even if the request is cancelled by its alarm or the outlet alarm).
In the event of a regulation probe error, the fan ON/OFF switch will be controlled on request from the compressor.
When the fan is ON it is piloted at the speed set by parameter
Fn24 .
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