Index: dialin/hd/valves.py
===================================================================
diff -u -re2d925f873714f2bc9a4b90ce7b72fd78919f391 -r3f640809b83e8f5bc080ba3736d6c0719d1503df
--- dialin/hd/valves.py	(.../valves.py)	(revision e2d925f873714f2bc9a4b90ce7b72fd78919f391)
+++ dialin/hd/valves.py	(.../valves.py)	(revision 3f640809b83e8f5bc080ba3736d6c0719d1503df)
@@ -15,12 +15,20 @@
     VBA = 2
     VBV = 3
 
+    @classmethod
+    def has_value(cls, value):
+        return value in cls._value2member_map_
+
 class ValvesPositions(enum.Enum):
     VALVE_POSITION_NOT_IN_POSITION = 0
     VALVE_POSITION_A_INSERT_EJECT  = 1
     VALVE_POSITION_B_OPEN          = 2
     VALVE_POSITION_C_CLOSE         = 3
 
+    @classmethod
+    def has_value(cls, value):
+        return value in cls._value2member_map_
+
 class ValvesStates(enum.Enum):
     VALVE_STATE_WAIT_FOR_POST                = 0
     VALVE_STATE_HOMING_NOT_STARTED           = 1
@@ -30,10 +38,18 @@
     VALVE_STATE_IN_TRANSITION                = 5
     VALVE_STATE_IN_BYPASS_MODE               = 6
 
+    @classmethod
+    def has_value(cls, value):
+        return value in cls._value2member_map_
+
 class AirTrapState(enum.Enum):
     STATE_CLOSED = 0
     STATE_OPEN   = 1
 
+    @classmethod
+    def has_value(cls, value):
+        return value in cls._value2member_map_
+
 class HDValves(_AbstractSubSystem):
     """
     \class HDValves
@@ -278,18 +294,14 @@
         air_trap = struct.unpack('i', bytearray(
             message['message'][self.START_AIR_TRAP_VALVE_STATUS:self.END_AIR_TRAP_VALVE_STATUS]))[0]
 
-        # To make sure the valve number is not out of range
-        try:
-            # Get the valve name
+        # To make sure values of the enums are not out of range
+        if ValvesEnum.has_value(vlv_ID) and ValvesPositions.has_value(pos_ID) and ValvesStates.has_value(pos_ID):
             vlv_name = ValvesEnum(vlv_ID).name
             # Update the valves dictionary
             self.valves_status[vlv_name] = {'Valve': vlv_name, 'PosID': ValvesPositions(pos_ID).name, 'PosCnt': pos_cnt,
                                             'Cmd': next_pos, 'State': ValvesStates(state_ID).name, 'Current': current,
                                             'PosA': pos_a, 'PosB': pos_b, 'PosC': pos_c, 'PWM': pwm}
-        except:
-            self.logger.debug('Invalid ID Selected')
 
-        try:
+        if AirTrapState.has_value(air_trap):
             self.hd_air_trap_status = AirTrapState(air_trap).name
-        except:
-            self.hd_air_trap_status = 'Valve Status Unknown'
+