Index: firmware/App/Modes/OperationModes.h
===================================================================
diff -u -rb64c49fdcf2b6d95e61e63f8e258c4e600935bbd -rf267c42c91fd6e22db80e19039b8993582de51e9
--- firmware/App/Modes/OperationModes.h	(.../OperationModes.h)	(revision b64c49fdcf2b6d95e61e63f8e258c4e600935bbd)
+++ firmware/App/Modes/OperationModes.h	(.../OperationModes.h)	(revision f267c42c91fd6e22db80e19039b8993582de51e9)
@@ -26,7 +26,8 @@
     MODE_FAUL = 0,            // Fault
     MODE_SERV,                // Service
     MODE_INIT,                // Initialization & POST
-    MODE_STAN,                // Standby
+    MODE_STAN,                // Standby - mated to HD
+    MODE_SOLO,                // Standby - no HD connected
     MODE_FILL,                // Fill mode
     MODE_DRAI,                // Drain
     MODE_FLUS,                // Flush