diff --git a/custom_components/saj_esolar/sensor.py b/custom_components/saj_esolar/sensor.py
index 276fa00..97b4a95 100644
--- a/custom_components/saj_esolar/sensor.py
+++ b/custom_components/saj_esolar/sensor.py
@@ -870,8 +870,10 @@ async def async_update(self):
                     if energy['plantDetail']["runningState"] is not None:
                         if int(energy['plantDetail']["runningState"]) is 0:
                             self._state = "No"
-                        else:
+                        elif int(energy['plantDetail']["runningState"]) is 1
                             self._state = "Yes"
+                        else:
+                            self._state = "Error"
             if self._type == 'todayElectricity':
                 if 'todayElectricity' in energy['plantDetail']:
                     if energy['plantDetail']["todayElectricity"] is not None:
@@ -1198,4 +1200,4 @@ async def async_update(self):
 
 
             # -Debug- adding sensor
-            _LOGGER.debug(f"Device: {self._type} State: {self._state}")
\ No newline at end of file
+            _LOGGER.debug(f"Device: {self._type} State: {self._state}")