Do not refresh if offline

Author: kzscisoft

simvue/eco/emissions_monitor.py

@@ -156,7 +156,7 @@ def check_refresh(self) -> bool:
             whether a refresh of the CO2 intensity was requested
             from the CO2 Signal API.
         """
-        if not self.co2_intensity and (
+        if (
             not self._local_data.setdefault(self._client.country_code, {})
             or self.outdated
         ):
@@ -193,12 +193,11 @@ def estimate_co2_emissions(
         if not (_process := self._processes.get(process_id)):
             self._processes[process_id] = (_process := ProcessData())
 
-        self.check_refresh()
-
         if self.co2_intensity:
             _current_co2_intensity = self.co2_intensity
             _co2_units = "kgCO2/kWh"
         else:
+            self.check_refresh()
             self._current_co2_data = CO2SignalResponse(
                 **self._local_data[self._client.country_code]
             )