diff --git a/src/Libilsws.php b/src/Libilsws.php
index 2809aeb..6375da6 100644
--- a/src/Libilsws.php
+++ b/src/Libilsws.php
@@ -32,41 +32,37 @@ class APIException extends Exception
 {
 
     // Handles API errors that should be logged
-    public function errorMessage ($error = "", $code = 0) 
+    public function errorMessage ($error = '', $code = 0) 
     {
         $message = '';
+        $err_message = json_decode($error, true);
+        if ( json_last_error() === JSON_ERROR_NONE ) {
+            if ( !empty($err_message['messageList'][0]['message']) ) {
+                $error = $err_message['messageList'][0]['message'];
+            }
+        }
 
         switch ($code) {
             case 400:
-                $message .= "HTTP $code: Bad Request";
+                $message = "HTTP $code: Bad Request";
                 break;
             case 401:
-                $message .= "HTTP $code: Unauthorized";
+                $message = "HTTP $code: Unauthorized";
                 break;
             case 403:
-                $message .= "HTTP $code: Forbidden";
+                $message = "HTTP $code: Forbidden";
                 break;
             case 404:
-                $message .= "HTTP $code: Not Found";
+                $message = "HTTP $code: Not Found";
                 break;
-            case 500:
-                $message .= "HTTP $code: Internal Server Error";
+            case (preg_match('/^5\d\d$/', $code) ? true : false):
+                $message = "HTTP $code: SirsiDynix Web Services unavailable";
                 break;
+            default:
+                $message = "HTTP $code: $error";
         }
 
-        $err_message = json_decode($error, true);
-        if ( json_last_error() === JSON_ERROR_NONE ) {
-            if ( !empty($err_message['messageList'][0]['message']) ) {
-                $error = $err_message['messageList'][0]['message'];
-                $message .= ": $error";
-            }
-        }
-
-        if ( !$message ) {
-            $message = "HTTP $code: $error";
-        }
-
-       return $message;
+        return $message;
     }
 }