Minimum and maximum frequency feedback from fan error
Fan driving problem – in case of new burner request the fan is switched on: if the controller measured a frequency lower than 20HZ or higher than 295 HZ, error will be set with a confirming time of 15 seconds. In case speed is back to the normal operating range, error is gone. In error mode, heat demands will be disabled. Resolving situation can be achieved only if the speed is within operating range again.
