Index: firmware/App/Modes/ModeStandby.c
===================================================================
diff -u -rcec14e1b1b636760fcd44ab35f3f45a71a79b776 -r1a5efe97f5f39594b45797fded52cafce92afe80
--- firmware/App/Modes/ModeStandby.c	(.../ModeStandby.c)	(revision cec14e1b1b636760fcd44ab35f3f45a71a79b776)
+++ firmware/App/Modes/ModeStandby.c	(.../ModeStandby.c)	(revision 1a5efe97f5f39594b45797fded52cafce92afe80)
@@ -190,7 +190,7 @@
         filterFlushStartTime = getMSTimerCount();
         setValveState( VPI, VALVE_STATE_OPEN );
 #ifndef V_2_SYSTEM
-        setValveState( VPD, VALVE_STATE_DRAIN_C_TO_NO );
+        setValveState( VPD, VALVE_STATE_OPEN_C_TO_NC );
 #else
         setValveState( VPD, VALVE_STATE_OPEN );  // TODO: VPD drain state is closed for V3
 #endif