Index: sources/canbus/MessageDispatcher.cpp
===================================================================
diff -u -r2d0bacfbe1b70055247eb40743405a5f9acb15e3 -ra04fd119778f0483cba5139a11e3c6bad7f2324a
--- sources/canbus/MessageDispatcher.cpp	(.../MessageDispatcher.cpp)	(revision 2d0bacfbe1b70055247eb40743405a5f9acb15e3)
+++ sources/canbus/MessageDispatcher.cpp	(.../MessageDispatcher.cpp)	(revision a04fd119778f0483cba5139a11e3c6bad7f2324a)
@@ -349,8 +349,7 @@
 void MessageDispatcher::onAdjustment(const AdjustHDAlarmVolumeRequestData &vData)
 {
     QVariantList mData;
-    const int hw2ui =   20; // HD vol range is [1-5] and we show [20%-100%] to user (100 / 5).
-    mData += vData.volume / hw2ui;
+    mData += vData.volume2HD();
     onActionTransmit(GuiActionType::ID_AlarmVolumeSetReq, mData);
 }