diff --git a/document/unit-procedures/SC_VYT_DR540.md b/document/unit-procedures/SC_VYT_DR540.md
index 9a0ec09..f8eb4f2 100644
--- a/document/unit-procedures/SC_VYT_DR540.md
+++ b/document/unit-procedures/SC_VYT_DR540.md
@@ -52,7 +52,7 @@
 
 | name                         | type               | value              | defer              | EU                 |
 | ---------------------------- | ------------------ | ------------------ | ------------------ | ------------------ |
-|AIR_VOLUME                    |Real                |4501                |                    |                    |
+|AIR_VOLUME                    |Real                |4502                |                    |                    |
 |AST_AIR                       |Integer             |80                  |                    |                    |
 |FILTER_SHAKING_INTERVAL       |Integer             |120                 |                    |                    |
 |PERCENTAGE                    |Integer             |50                  |                    |                    |