diff --git a/openlp/core/lib/projector/pjlink1.py b/openlp/core/lib/projector/pjlink1.py
index e5db478c2..3e9a8b422 100644
--- a/openlp/core/lib/projector/pjlink1.py
+++ b/openlp/core/lib/projector/pjlink1.py
@@ -352,7 +352,7 @@ class PJLink1(QTcpSocket):
             return
         elif data_check[1] == '1':
             # Authenticated login with salt
-            if pin is None:
+            if self.pin is None:
                 log.warning('({ip}) Authenticated connection but no pin set'.format(ip=self.name))
                 self.disconnect_from_host()
                 self.change_status(E_AUTHENTICATION)
@@ -362,7 +362,7 @@ class PJLink1(QTcpSocket):
             else:
                 log.debug('({ip}) Setting hash with salt="{data}"'.format(ip=self.ip, data=data_check[2]))
                 log.debug('({ip}) pin="{data}"'.format(ip=self.ip, data=self.pin))
-                salt = qmd5_hash(salt=data_check[2].encode('ascii'), data=self.pin.encode('ascii'))
+                salt = qmd5_hash(salt=data_check[2].encode('ascii'), data=self.pin.encode('ascii')).encode('utf-8')
         else:
             salt = None
         # We're connected at this point, so go ahead and do regular I/O
diff --git a/tests/functional/openlp_core_lib/test_projector_pjlink1.py b/tests/functional/openlp_core_lib/test_projector_pjlink1.py
index 4928e5d0c..6cdff4ff6 100644
--- a/tests/functional/openlp_core_lib/test_projector_pjlink1.py
+++ b/tests/functional/openlp_core_lib/test_projector_pjlink1.py
@@ -332,3 +332,27 @@ class TestPJLink(TestCase):
         self.assertFalse(pjlink.send_busy, 'Projector send_busy should be False')
         self.assertTrue(mock_timer.called, 'Projector timer.stop()  should have been called')
         self.assertTrue(mock_socket_timer.called, 'Projector socket_timer.stop() should have been called')
+
+    @patch.object(pjlink_test, 'send_command')
+    @patch.object(pjlink_test, 'waitForReadyRead')
+    @patch.object(pjlink_test, 'projectorNoAuthentication')
+    @patch.object(pjlink_test, 'timer')
+    @patch.object(pjlink_test, 'socket_timer')
+    def test_bug_1593882_no_pin_authenticated_connection(self, mock_socket_timer,
+                                                         mock_timer,
+                                                         mock_no_authentication,
+                                                         mock_ready_read,
+                                                         mock_send_command):
+        """
+        Test bug 1593882 no pin and authenticated request exception
+        """
+        # GIVEN: Test object and mocks
+        pjlink = pjlink_test
+        pjlink.pin = None
+        mock_ready_read.return_value = True
+
+        # WHEN: call with authentication request and pin not set
+        pjlink.check_login(data='PJLink 1 123abc')
+
+        # THEN: No Authentication signal should have been sent
+        mock_no_authentication.called_with(pjlink.name, 'projectorNoAuthentication should have been called')