diff --git a/nucon/core.py b/nucon/core.py
index fcca48b..d6f0709 100644
--- a/nucon/core.py
+++ b/nucon/core.py
@@ -33,14 +33,14 @@ class PumpDryStatus(ParameterEnum):
     INACTIVE_OR_ACTIVE_WITH_FLUID = 4
 
     def __bool__(self):
-        return self.value == 4
+        return self.value == 1
 
 class PumpOverloadStatus(ParameterEnum):
     ACTIVE_AND_OVERLOAD = 1
     INACTIVE_OR_ACTIVE_NO_OVERLOAD = 4
 
     def __bool__(self):
-        return self.value == 4
+        return self.value == 1
 
 class BreakerStatus(ParameterEnum):
     OPEN = True
@@ -312,4 +312,4 @@ class Nucon:
         return list(super().__dir__()) + list(self._parameters.keys())
 
     def __len__(self):
-        return len(self._parameters)
\ No newline at end of file
+        return len(self._parameters)