add comment explaining safety relay

Opentrons · Aug 22, 2024 · d72e73e · d72e73e
1 parent 553b744
commit d72e73e
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/include/hepa-uv/core/uv_task.hpp b/include/hepa-uv/core/uv_task.hpp
@@ -149,6 +149,9 @@ class UVMessageHandler {
             return;
         }
 
+        // The safety relay needs to be active (Door Closed, Reed Switch set, and
+        // Push Button pressed) in order to turn on the UV Light. So Send an
+        // error if the safety relay is not active when trying to turn on the light.
         update_safety_relay_state();
         if (light_on && !safety_relay_active) {
             if (_timer.is_running()) _timer.stop();