diff --git a/app/external/remnawave_api.py b/app/external/remnawave_api.py
index 63293186..087beb04 100644
--- a/app/external/remnawave_api.py
+++ b/app/external/remnawave_api.py
@@ -400,8 +400,9 @@ class RemnaWaveAPI:
 
                     if response.status >= 400:
                         error_message = response_data.get('message', f'HTTP {response.status}')
-                        logger.error(f'API Error {response.status}: {error_message}')
-                        logger.error(f'Response: {response_text[:500]}')
+                        log = logger.warning if response.status in (502, 503, 504) else logger.error
+                        log('API Error %s: %s', response.status, error_message)
+                        log('Response: %s', response_text[:500])
                         raise RemnaWaveAPIError(error_message, response.status, response_data)
 
                     return response_data
@@ -1284,5 +1285,5 @@ async def test_api_connection(api: RemnaWaveAPI) -> bool:
         await api.get_system_stats()
         return True
     except Exception as e:
-        logger.error(f'API connection test failed: {e}')
+        logger.warning('API connection test failed: %s', e)
         return False