From e6644637c63889a2874cafd81a66b2eecd2f33a6 Mon Sep 17 00:00:00 2001
From: Scott Petersen <scott@digression.org>
Date: Tue, 26 Nov 2013 09:11:31 -0800
Subject: [PATCH] Added note regarding missing expander zones in fault list.

---
 pyad2/zonetracking.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pyad2/zonetracking.py b/pyad2/zonetracking.py
index 81729f2..0bce601 100644
--- a/pyad2/zonetracking.py
+++ b/pyad2/zonetracking.py
@@ -88,6 +88,9 @@ class Zonetracker(object):
                 elif message.value == 2:
                     status = Zone.CHECK
 
+                # NOTE: Expander zone faults are handled differently than regular messages.
+                # We don't include them in self._zones_faulted because they are not reported
+                # by the panel in it's rolling list of faults.
                 try:
                     self._update_zone(zone, status=status)