diff --git a/supervisor/facility.lua b/supervisor/facility.lua
index 3ef7eb5..f418c69 100644
--- a/supervisor/facility.lua
+++ b/supervisor/facility.lua
@@ -212,7 +212,7 @@ function facility.new(config, cooling_conf, check_rtu_id)
         f_update.unit_mgmt(cooling_conf)
 
         -- update alarm tones
-        f_update.update_alarms()
+        f_update.alarm_audio()
     end
 
     -- call the update function of all units in the facility<br>
diff --git a/supervisor/facility_update.lua b/supervisor/facility_update.lua
index 94255b2..b26c722 100644
--- a/supervisor/facility_update.lua
+++ b/supervisor/facility_update.lua
@@ -43,6 +43,7 @@ local next_mode     = 0
 local charge_update = 0
 local rate_update   = 0
 
+---@class facility_update_extension
 local update = {}
 
 --#region PRIVATE FUNCTIONS