diff --git a/homeassistant/components/isy994/__init__.py b/homeassistant/components/isy994/__init__.py
index 99905e4d946..51c34aeb0a7 100644
--- a/homeassistant/components/isy994/__init__.py
+++ b/homeassistant/components/isy994/__init__.py
@@ -172,14 +172,12 @@ async def async_setup_entry(
     )
 
     try:
-        async with async_timeout.timeout(30):
+        async with async_timeout.timeout(60):
             await isy.initialize()
     except asyncio.TimeoutError as err:
-        _LOGGER.error(
-            "Timed out initializing the ISY; device may be busy, trying again later: %s",
-            err,
-        )
-        raise ConfigEntryNotReady from err
+        raise ConfigEntryNotReady(
+            f"Timed out initializing the ISY; device may be busy, trying again later: {err}"
+        ) from err
     except ISYInvalidAuthError as err:
         _LOGGER.error(
             "Invalid credentials for the ISY, please adjust settings and try again: %s",
@@ -187,16 +185,13 @@ async def async_setup_entry(
         )
         return False
     except ISYConnectionError as err:
-        _LOGGER.error(
-            "Failed to connect to the ISY, please adjust settings and try again: %s",
-            err,
-        )
-        raise ConfigEntryNotReady from err
+        raise ConfigEntryNotReady(
+            f"Failed to connect to the ISY, please adjust settings and try again: {err}"
+        ) from err
     except ISYResponseParseError as err:
-        _LOGGER.warning(
-            "Error processing responses from the ISY; device may be busy, trying again later"
-        )
-        raise ConfigEntryNotReady from err
+        raise ConfigEntryNotReady(
+            f"Invalid XML response from ISY; Ensure the ISY is running the latest firmware: {err}"
+        ) from err
 
     _categorize_nodes(hass_isy_data, isy.nodes, ignore_identifier, sensor_identifier)
     _categorize_programs(hass_isy_data, isy.programs)