diff --git a/pydeconz/errors.py b/pydeconz/errors.py
index 8ddd1de0..05c5a376 100644
--- a/pydeconz/errors.py
+++ b/pydeconz/errors.py
@@ -27,6 +27,10 @@ class LinkButtonNotPressed(pydeconzException):
     """The Link button has not been pressed."""
 
 
+class NotConnected(pydeconzException):
+    """The Hardware is not connected."""
+
+
 class RequestError(pydeconzException):
     """Unable to fulfill request.
 
@@ -57,6 +61,8 @@ class Unauthorized(pydeconzException):
     8: RequestError,  # Parameter is not modifiable
     101: LinkButtonNotPressed,  # Link button not pressed
     901: BridgeBusy,  # May occur when sending too fast
+    950: NotConnected,  # Hardware is not connected
+    951: BridgeBusy,  # May occur when sending too fast
 }