From bb432458eb43d1b5a047c7743287fc5f93fabd69 Mon Sep 17 00:00:00 2001
From: legoboyvdlp R <legoboyvdlp@gmail.com>
Date: Tue, 27 Jul 2021 21:19:17 +0100
Subject: [PATCH] ECAM: only do the swap if the display failed

---
 Nasal/ECAM/ECAM-main.nas | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Nasal/ECAM/ECAM-main.nas b/Nasal/ECAM/ECAM-main.nas
index 49ee52ac..9de2f5d4 100644
--- a/Nasal/ECAM/ECAM-main.nas
+++ b/Nasal/ECAM/ECAM-main.nas
@@ -131,12 +131,15 @@ var ECAM = {
 	},
 };
 
+var du4_lgt = props.globals.getNode("/controls/lighting/DU/du4", 1);
 var ECAMControlPanel = {
 	sysPageBtn: func(page) {
 		if (page == "REL") {
 			pts.Modes.EcamDuXfr.setBoolValue(0);
 		} else {
-			pts.Modes.EcamDuXfr.setBoolValue(1);
+			if (du4_lgt.getValue() < 0.01 or systems.ELEC.Bus.ac2.getValue() < 110) {
+				pts.Modes.EcamDuXfr.setBoolValue(1);
+			}
 			SystemDisplayController.manCall(page);
 		}
 	},