Index: firmware/App/Modes/ModeStandby.c
===================================================================
diff -u -rbbf1e3736be03a4f041ace57e0f95e23caf472dd -re66245baae86e539e8470aa9739a99a2146d5f17
--- firmware/App/Modes/ModeStandby.c	(.../ModeStandby.c)	(revision bbf1e3736be03a4f041ace57e0f95e23caf472dd)
+++ firmware/App/Modes/ModeStandby.c	(.../ModeStandby.c)	(revision e66245baae86e539e8470aa9739a99a2146d5f17)
@@ -76,6 +76,7 @@
 
     // set initial actuator states
     setValveState( VPI, VALVE_STATE_CLOSED );
+    setValveState( VSP, VALVE_STATE_CLOSED );
     setValveState( VRC, VALVE_STATE_DRAIN_C_TO_NO );
     setValveState( VDR, VALVE_STATE_DRAIN_C_TO_NO );
     setValveState( VPO, VALVE_STATE_NOFILL_C_TO_NO );