diff --git a/src/ATBAPP/ATBDeviceControllerPlugin.cpp b/src/ATBAPP/ATBDeviceControllerPlugin.cpp
index 3f8f43e..4d0dc08 100644
--- a/src/ATBAPP/ATBDeviceControllerPlugin.cpp
+++ b/src/ATBAPP/ATBDeviceControllerPlugin.cpp
@@ -98,6 +98,16 @@ PLUGIN_STATE ATBDeviceControllerPlugin::initDCPlugin(QObject *eventReceiver, con
     // text encoding for printer
     this->codec = QTextCodec::codecForName(printerEncoding);
 
+    if (this->codec == nullptr) {
+        printerEncoding = "ISO 8859-1";
+        qCritical() << "ATBDeviceControllerPlugin: ERROR: printer encoding \"" << printerEncoding << "\" is not supported!";
+        qCritical() << "     ... use default encoding: " << printerEncoding;
+        this->codec = QTextCodec::codecForName(printerEncoding);
+    }
+    else {
+        qCritical() << "ATBDeviceControllerPlugin: Set printer encoding to " << printerEncoding;
+    }
+
     this->diag->init(this->hw, this->eventReceiver);
 
     this->pluginState = PLUGIN_STATE::INITIALIZED;