Heat Controller DXM2 manual Basic Troubleshooting Information

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Application, Operation, & Maintenance Manual

DXM2 UNIT CONTROLS

Heat Controller, Inc.

Basic Troubleshooting Information

General Troubleshooting

Basic DXM2 board troubleshooting in general is best summarized as simply verifying inputs and outputs. After this process has been verified, confidence in board operation is confirmed and the trouble must be else where. Below are some general guidelines required for developing training materials and procedures when applying the DXM2 Control.

DXM2 Field Inputs

All conventional inputs are 24VAC from the thermostat and can be verified using a voltmeter between C and Y1, Y2, W, O, and G.

Sensor Inputs

All sensor inputs are ‘paired wires’ connecting each component with the board. Therefore continuity on pressure switches can be checked at the board connector.

The thermistor resistance should be measured with the connector removed so that only the impedance of the thermistor is measured. If desired, this reading can be compared to the chart shown in the thermistor section of this manual based upon the actual temperature of the thermistor clip. An ice bath can be used to check calibration of a thermistor if needed.

DXM2 Outputs

The compressor relay is 24VAC and can be verified using a voltmeter. The Alarm Relay can either be 24VAC as shipped or dry contacts (measure continuity during fault) for use with DDC by clipping the J4 jumper. Electric heat outputs are 24VDC and require a voltmeter set for DC to verify operation. When troubleshooting, measure from 24VDC terminal to EH1 or EH2 terminals.

Test Mode

Test Mode can be entered for 20 minutes by pressing the Test button. For Diagnostic ease at a conventional thermostat, the Alarm Relay will also cycle during test mode. The Alarm Relay will cycle on and off similar to the Fault LED to indicate a code representing the last fault, at the thermostat. Test Mode can also be entered and exited by cycling the G input, 3 times within a 60 second time period.

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Contents DXM2 Digital Heat Pump Controller Table of Contents DXM2 Electronic Heat Pump Controls DXM2 OverviewDXM2 Physical Dimensions & Layout Test P12DXM2 Layout and Connections P11 P10Field Selectable Inputs DIP SwitchesDXM2 Controls DIP Package #1 S1DIP Package #3 S3 DIP Package #2 S2Safety Features Fault CodesLockout with Emergency Heat If the DXM2 is Unit Operation Description LED and Alarm Relay Output Table DXM2 Controls Special DXM2 Application Notes / Accessory Relays Thermostat Inputs With Resulting Demands Other Outputs System Inputs with the resulting demandCommunications DXM2 SensorsDXM2 Service & Application Notes Pressure SwitchesDXM2 Thermostat Details Thermostat CompatibilityBasic Troubleshooting Information Advanced Troubleshooting and Configuration Information GeneralSystem Configuration Service Mode Troubleshooting Chart Start024 DXM2 Wiring Diagram Standard Installation 96B0005N56 Functional Troubleshooting Fault Htg Clg Possible Cause SolutionESD ERV Fault DXM Only Performance Troubleshooting Symptom Htg Clg Possible Cause SolutionDXM2 Unit Controls 2012

DXM2 specifications

The Heat Controller DXM2 is an advanced heating and cooling solution, meticulously designed for residential and commercial applications. This sophisticated unit integrates modern technologies to deliver superior climate control, ensuring comfort while maintaining energy efficiency. Among its standout features are its intuitive operation, flexibility in installation, and superior performance metrics.

One of the key attributes of the DXM2 is its advanced inverter technology, which allows for variable speed operation. This feature enables the system to adjust its output based on real-time cooling or heating demands, resulting in reduced energy consumption and lower utility bills. The inverter technology not only promotes efficiency but also enhances the system's operational longevity, as it reduces the wear and tear typically associated with traditional HVAC systems that operate at fixed speeds.

The unit boasts a user-friendly interface that allows for seamless control. With its advanced remote control and optional smartphone app connectivity, users can effortlessly adjust settings from anywhere, making it a perfect fit for today’s tech-savvy homeowners. This flexibility ensures that comfort can be customized according to personal preferences and schedules.

Additionally, the DXM2 is equipped with a multi-stage filtration system that actively removes dust, allergens, and other airborne particles, contributing to improved indoor air quality. This feature is particularly beneficial for individuals with allergies or respiratory issues, as it ensures cleaner air circulating throughout the living space.

The system’s whisper-quiet operation sets it apart from many competitors in the market. With noise levels comparable to a soft breeze, the DXM2 provides comfort without disruptive sounds, making it ideal for bedrooms, offices, and quiet spaces.

Moreover, the DXM2 offers enhanced durability and reliability due to its robust construction and high-quality components. The unit is designed to withstand harsh weather conditions and varying environments, ensuring consistent performance year-round.

Another noteworthy characteristic is its eco-friendly refrigerant, which aligns with contemporary environmental standards. This selection contributes to lower greenhouse gas emissions while maintaining efficiency and effectiveness in both heating and cooling modes.

In conclusion, the Heat Controller DXM2 is a prominent choice for anyone seeking a reliable and efficient climate control system. Its combination of advanced technology, customizable features, superior air quality management, and low noise levels positions it as a leader in the heating and cooling industry. Ultimately, the DXM2 is engineered to meet the demands of modern living, creating comfortable environments with unparalleled convenience and efficiency.