ClimateMaster Tranquility Digital DXM2 User Manual

DIGITAL Geothermal
Heat Pumps
TE/TZ/TES/TEP
97B0601N01
Rev.: 3/10/15
Tranquility
®
Digital (DXM2)
Troubleshooting Guide
Table of Contents
Introduction 2
Troubleshooting Flow Chart 3-9
Flow Chart Reference Symbols and Diagrams 10
Contactor Chart 12
Verifying Pump Feedback Signal 12
Removing Powerhead on Modulating Valve 13-14
Checking Compressors 15-16
Reversing Valve Touch Test Chart 17
Performance Troubleshooting 17-18
Functional Troubleshooting 20-22
Typical Split Water-to-Air Troubleshooting Form 23
Typical Water Source Refrigeration Circuit 24
(Heating Cycle)
Unit Operating Conditions 25
Basic Refrigeration Summary 26
Refrigeration Troubleshooting 27-28
Auxiliary Heat Check 29
Checking Pump Output 29
Compressor Contactor Voltage Check 30
Check CCH for 24 Volts 30
Verifying Contactor 30
Verifying Capacitor 31
Checking Pump Power Cord 31
Replacing Variable-Speed Pump Power Head 32
Verifying Power at Molded Plug 32
for Compressor
Verifying Antifreeze 33
Second Stage Verication 34
Verifying 24V at Reversing Valve 35
Checking Reversing Valve at DXM2 35
A0-2 Jumper 36
Checking for Power at DXM2 36
Verifying DC Voltage on DXM2 Board 37
for Modulating Valve Check
TXV Bulb Test 38
Verifying Dipswitch Position 39
Replacing High Pressure Water Switch 39
Verifying a Thermistor 40-41
Turning Breaker on in Panel or Aux Heat Control 42
Static Pressure Check 42
Locating Tstat Version and DXM2 Version 43
UltraCheck EZ
™
Motor Diagnostic Tool 43
Checking Dipswitches on DXM2 44
Magnet Test to Shift Reversing Valve 44
Checking Blower Line Voltage 45
Modulating Valve Loses Conguration 45
Hard Reset of Thermostat 46
Units Having LT1 Lockouts In Heating 47
Electrical—Power Wiring 48
LT2 Sensor Location for Non-TAH Air Handlers 49
Air Coil Connection 49
Lineset Diameters and Charge Information 49
Connection to Non-Communicating thermostat and
AXM communicating control in TAH Air Handler 50
Connection to Non-Communicating thermostat
and non-communicating Air Handler/Furnace 50
Denitions of Conditions 51-52
DXM2 Board Layout and Dipswitches 53
AXM Board Layout and Dipswitches 54
DXM2 Controls 55-58
Typical Wiring Diagrams 59-61
ATC32U02 Thermostat Screens and Set Up 62-68
Revision History 72

ClimateMaster Tranquility Digital DXM2 Specifications

General

Brand	ClimateMaster
Model	Tranquility Digital DXM2
Category	Heat Pump
Language	English

Summary

Introduction

Troubleshooting Flow Chart

Notes: Specific to Splits

Reference Symbols and Diagrams for Flow Chart

Contactor Chart

Verifying Pump Feedback Signal

Removing Powerhead on 3/4-Inch Modulating Valve

Removing Powerhead on 1-Inch Modulating Valve

Checking Compressors

An Alternative Way of Checking Compressors

Reversing Valve Touch Test Chart

Performance Troubleshooting

Performance Troubleshooting

Functional Troubleshooting

Functional Troubleshooting

Functional Troubleshooting

Typical Split Water-to-Air Troubleshooting Form

Typical Water Source Refrigeration Circuit (Heating Cycle)

Unit Operating Conditions

Basic Refrigeration Summary

Refrigeration Troubleshooting

Refrigeration Troubleshooting

Auxiliary Heat Check

Checking Pump Output

Compressor Contactor Voltage Check

Verifying Contactor

Verifying Capacitor

Checking Pump Power Cord

Replacing Variable-Speed Pump Power Head

Verifying Power at Molded Plug For Compressor

Verifying Antifreeze

Second Stage Verification

Verifying 24V at Reversing Valve

Checking Reversing Valve at DXM2

A0-2 Jumper Configuration

Checking for Power at DXM2

Verifying DC Voltage on DXM2 Board for Modulating Valve Check

TXV Bulb Test

Verifying Dipswitch Position

Replacing High Pressure Water Switch

Verifying a Thermistor

Verifying a Thermistor

Turning Breaker on in Panel or Auxiliary Heat Control

Static Pressure Check

Locating Thermostat Version and DXM2 Version

UltraCheck-EZ™ Motor Diagnostic Tool

Checking Dipswitches on DXM2

Magnet Test to Shift Reversing Valve into Cooling

Checking Blower Line Voltage

For a Modulating Valve that Loses Configuration on Thermostat

Hard Reset of Thermostat

Units Having LTI Lockouts In Heating with Modulating Valve (Open Loop)

Electrical-Power Wiring

LT2 Sensor Location for Non-TAH Air Handlers

Air Coil Connection

Lineset Diameters and Charge Information

Connection to Non-Communicating Thermostat and AXM Control

Definitions of Conditions

Definitions of Conditions

DXM2 Board Layout and Dipswitches

AXM Board Layout and Dipswitches

DXM2 Controls

Test Mode Operation

Allows service technician to check control operation.

Dip Switch Configuration Options

Configures various operational parameters via DIP switches.

DXM2 Controls

DDC and Boilerless Operation Settings

Configures DDC output, boilerless modes, and changeover temps.

Accessory and Dehumidification Settings

Configures accessory relay options, fan modes, and communication.

Safety Features

Details anti-short cycle and random start protections.

DXM2 Controls

High Pressure Fault (Code 2)

Addresses issues with the high pressure switch.

Loss of Charge Fault (Code 3)

Details the loss of charge switch fault condition.

Low Temperature Faults (Codes 4 & 5)

Covers LT1 and LT2 low temperature cut-out faults.

Condensate Overflow & Voltage Faults (Codes 6 & 7)

Addresses condensate overflow and voltage faults.

DXM2 Controls

Unit Performance Sentinel Fault (Code 8)

Explains the UPS feature for inefficient operation.

Swapped Thermistor Fault (Code 9)

Detects swapped LT1/LT2 thermistor connections.

ECM Blower & Low Pressure Faults (Codes 10 & 11)

Covers ECM blower issues and low air coil pressure.

Low Air Temperature & Internal Flow Faults (Codes 12 & 13)

Addresses low air temperature and internal flow center faults.

ESD Mode

Explains the Emergency Shut Down mode for ERV units.

Typical Wiring Diagram - 96B0005N55

DXM2 Wiring Diagram with Internal Flow Controller - 96B0005N60

DXM2 Wiring Diagram with Motorized Modulating Water Valve - 96B0005N62

ATC32U02 Thermostat Screens and Set Up

Installer Menu Access and Overview

Accessing and overview of installer settings menus.

Thermostat Configuration: Staging and Auxiliary Heat

Setting up staging and auxiliary heat modes.

ATC32U02 Thermostat Screens and Set Up

System Configuration Overview

Adjusting critical equipment settings in the thermostat.

Airflow and Option Selection

Setting airflow and general system options.

ATC32U02 Thermostat Screens and Set Up

Unit and Pump Configuration

Setting up heat pump family, blower type, and pump control.

ATC32U02 Thermostat Screens and Set Up

Valve Configuration

Setting temperature differentials for motorized modulating valves.

ATC32U02 Thermostat Screens and Set Up

Service Mode Overview

Overview of service mode functions for troubleshooting.

Manual Operation and Control Diagnostics

Manual control of outputs and viewing system status.

ATC32U02 Thermostat Screens and Set Up

Dipswitch Configuration

View status of dipswitch settings on the DXM2/AXM.

Fault History and Temperature Conditions

Displays recent fault codes and recorded temperatures.

ATC32U02 Thermostat Screens and Set Up

Fault Data: Flow, I/O, and Configuration

Displays blower speed, inputs, and dipswitch status at fault.

Fault Causes and Clearing History

Lists possible fault causes and how to clear fault history.

Revision History