Index: firmware/App/HDCommon.h
===================================================================
diff -u -r88e0f56fa5eb3af397fee7cebb49efdab54f8491 -r9bb9f9bb8b96f057b2ad8dd42c5ac4f0861c1d90
--- firmware/App/HDCommon.h	(.../HDCommon.h)	(revision 88e0f56fa5eb3af397fee7cebb49efdab54f8491)
+++ firmware/App/HDCommon.h	(.../HDCommon.h)	(revision 9bb9f9bb8b96f057b2ad8dd42c5ac4f0861c1d90)
@@ -1,17 +1,17 @@
 /**************************************************************************
 *
-* Copyright (c) 2019-2020 Diality Inc. - All Rights Reserved.
+* Copyright (c) 2019-2021 Diality Inc. - All Rights Reserved.
 *
 * THIS CODE MAY NOT BE COPIED OR REPRODUCED IN ANY FORM, IN PART OR IN
 * WHOLE, WITHOUT THE EXPLICIT PERMISSION OF THE COPYRIGHT OWNER.
 *
-* @file HDCommon.h
+* @file    HDCommon.h
 *
-* @author (last) Sean Nash
-* @date (last) 14-Oct-2020
+* @author  (last)      Quang Nguyen
+* @date    (last)      09-Aug-2021
 *
-* @author (original) Sean
-* @date (original) 27-Feb-2020
+* @author  (original)  Sean
+* @date    (original)  27-Feb-2020
 *
 ***************************************************************************/
 
@@ -25,7 +25,7 @@
 #define HD_VERSION_MAJOR        0
 #define HD_VERSION_MINOR        6
 #define HD_VERSION_MICRO        5
-#define HD_VERSION_BUILD        20
+#define HD_VERSION_BUILD        23
 
 // ********** development build switches **********
 
@@ -69,7 +69,8 @@
     #define DISABLE_OCCLUSION_SELF_TEST     1           // Skip occlusion sensor self-test.
 //    #define SKIP_CARTRIDGE_REMOVAL          1           // Skip cartridge removal check
 //    #define DISABLE_FPGA_COUNTER_CHECKS     1           // Disable alarms associated with FPGA read/error counters
-//    #define DISABLE_VOLTAGE_MONITOR         1           // Disable voltage monitoring/alarms
+    #define DISABLE_VOLTAGE_MONITOR         1           // Disable voltage monitoring/alarms
+    #define DISABLE_AIR_TRAP_ILLEGAL_LEVELS 1
     #define ALLOW_1_MIN_TREATMENT_DURATION  1           // Allow user to change treatment duration to as low as 1 minute
     #define DISABLE_SYRINGE_PUMP_ALARMS     1           // Disable some syringe pump alarms that are triggering intermittently
 //    #define NO_PUMP_FLOW_LIMITS             1           // Allow any commanded flow rate for peristaltic pumps