'Update unit attributes.'

def update(self):

    if (not self.unit.update()):
        _LOGGER.warning('Modbus    read    failed')
    self._target_temperature = self.unit.get_target_temp
    self._current_temperature = self.unit.get_temp
    self._current_fan_mode = self._fan_list[self.unit.get_fan_speed]
    self._filter_hours = self.unit.get_filter_hours
    self._heat_recovery = self.unit.get_heat_recovery
    self._heating = self.unit.get_heating
    self._cooling = self.unit.get_cooling
    self._filter_alarm = self.unit.get_filter_alarm
    self._heater_enabled = self.unit.get_heater_enabled
    self._current_operation = self.unit.get_operation
