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Dometic SMX II - User Manual

Dometic SMX II
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DX Modulating A/C System
INSTALLATION • OPERATION
Revised: 08-29-06
L-0952 English
Part Number: LP-28
For DX Modulating SMX II Control Systems using
SMXII and SMXir displays

Table of Contents

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Summary

Modulating A;C Systems Introduction

The Modulating System

Details the Cruisair modulating system's independent thermostatic control for multiple cooling units.

System Operation Overview

Describes the system's components: condensing unit, evaporators, refrigerant lines, and controls.

System Operation Details

Condensing Unit Function

Details the components of the condensing unit and their functions in the refrigerant cycle.

Cooling Unit and System Components

Cooling;Heating Units

Describes the independent cooling/heating units, their blowers, and operation in cool and heat modes.

SMX Control System

Explains the SMX microprocessor control for maintaining room temperature and system protection.

System Controls

Describes the SMX II microprocessor circuit board and its customizable functions.

Modulating A;C System Installation

Installation Procedures

Covers installation procedures including electrical connections and SMXir control setup.

Electrical System Requirements

Details power supply requirements, voltages, and frequencies for Cruisair systems.

Installing the Condensing Unit

Guidance on selecting a site, mounting, and safety warnings for condensing unit installation.

Cooling;Heating Unit Installation

Mounting the Cooling;Heating Unit

Instructions for mounting the cooling/heating unit, ensuring access to components and proper condensate drain routing.

Refrigerant Tubing Installation

Details on bending, connecting, and insulating refrigerant tubing for the system.

Cooling Unit Control Installation

SMX II Control System Components

Details the SMX II system components: Power/Logic box, Keypad/Display, sensors, and cables.

Power;Logic Box Installation

Instructions for mounting the Power/Logic box, emphasizing accessibility and ventilation.

SMXir Keypad;Display Installation

Guidance on installing the SMXir keypad/display for visibility and accessibility.

Charging the System with Refrigerant

Modulating System Charging Considerations

Explains unique charging considerations for modulating systems with bypass and de-superheat valves.

Initial Charging Procedure

Details the components involved in charging and the required tools for the process.

Adjusting Refrigerant Charge

Instructions for measuring superheat and adjusting refrigerant charge for optimal system performance.

Removing Refrigerant from System

Explains methods for removing refrigerant safely and legally, avoiding atmospheric release.

Initial Start Up

Modulating A;C Systems Operation

SMX II Control Systems Operation

Operating instructions for the SMX II control system, including keypad and remote functions.

SMX II Control Interface

Details the functions of SMX II keypad/display buttons, indicators, and definitions.

SMXir Remote Control Operation

Explains the functionality and limitations of the SMXir remote control.

Basic Operation

Programming the SMX II System

Fault Shutdowns and Error Messages

Software Error Message

Describes the 'PE' error message indicating a program fault or system failure.

Troubleshooting Common Problems

Unit Will Not Operate

Possible solutions for the unit not operating or the SMX display being off.

Erratic SMX Temperature Display

Possible solutions for erratic temperature readings on the SMX display.

Erratic SMX Operation

Possible solutions for erratic operation of the SMX system.

Air Not Feeling Cool

Possible solutions when the unit blows air but it doesn't feel cool.

Compressor Not Running

Possible solutions for the compressor not running.

Unit Blows Cool Air, No Cabin Cooling

Possible solutions when the unit blows cool air but fails to cool the cabin.

Compressor Cycling Issues

Possible solutions for the compressor cycling on and off frequently.

Cooling Unit Not Heating

Possible solutions when the cooling unit fails to heat.

Owners Limited Warranty

WARRANTY PROCEDURE

Warranty Service Procedure

Outlines the warranty procedure for obtaining service or repairs.

Summary

Modulating A;C Systems Introduction

The Modulating System

Details the Cruisair modulating system's independent thermostatic control for multiple cooling units.

System Operation Overview

Describes the system's components: condensing unit, evaporators, refrigerant lines, and controls.

System Operation Details

Condensing Unit Function

Details the components of the condensing unit and their functions in the refrigerant cycle.

Cooling Unit and System Components

Cooling;Heating Units

Describes the independent cooling/heating units, their blowers, and operation in cool and heat modes.

SMX Control System

Explains the SMX microprocessor control for maintaining room temperature and system protection.

System Controls

Describes the SMX II microprocessor circuit board and its customizable functions.

Modulating A;C System Installation

Installation Procedures

Covers installation procedures including electrical connections and SMXir control setup.

Electrical System Requirements

Details power supply requirements, voltages, and frequencies for Cruisair systems.

Installing the Condensing Unit

Guidance on selecting a site, mounting, and safety warnings for condensing unit installation.

Cooling;Heating Unit Installation

Mounting the Cooling;Heating Unit

Instructions for mounting the cooling/heating unit, ensuring access to components and proper condensate drain routing.

Refrigerant Tubing Installation

Details on bending, connecting, and insulating refrigerant tubing for the system.

Cooling Unit Control Installation

SMX II Control System Components

Details the SMX II system components: Power/Logic box, Keypad/Display, sensors, and cables.

Power;Logic Box Installation

Instructions for mounting the Power/Logic box, emphasizing accessibility and ventilation.

SMXir Keypad;Display Installation

Guidance on installing the SMXir keypad/display for visibility and accessibility.

Charging the System with Refrigerant

Modulating System Charging Considerations

Explains unique charging considerations for modulating systems with bypass and de-superheat valves.

Initial Charging Procedure

Details the components involved in charging and the required tools for the process.

Adjusting Refrigerant Charge

Instructions for measuring superheat and adjusting refrigerant charge for optimal system performance.

Removing Refrigerant from System

Explains methods for removing refrigerant safely and legally, avoiding atmospheric release.

Initial Start Up

Modulating A;C Systems Operation

SMX II Control Systems Operation

Operating instructions for the SMX II control system, including keypad and remote functions.

SMX II Control Interface

Details the functions of SMX II keypad/display buttons, indicators, and definitions.

SMXir Remote Control Operation

Explains the functionality and limitations of the SMXir remote control.

Basic Operation

Programming the SMX II System

Fault Shutdowns and Error Messages

Software Error Message

Describes the 'PE' error message indicating a program fault or system failure.

Troubleshooting Common Problems

Unit Will Not Operate

Possible solutions for the unit not operating or the SMX display being off.

Erratic SMX Temperature Display

Possible solutions for erratic temperature readings on the SMX display.

Erratic SMX Operation

Possible solutions for erratic operation of the SMX system.

Air Not Feeling Cool

Possible solutions when the unit blows air but it doesn't feel cool.

Compressor Not Running

Possible solutions for the compressor not running.

Unit Blows Cool Air, No Cabin Cooling

Possible solutions when the unit blows cool air but fails to cool the cabin.

Compressor Cycling Issues

Possible solutions for the compressor cycling on and off frequently.

Cooling Unit Not Heating

Possible solutions when the cooling unit fails to heat.

Owners Limited Warranty

WARRANTY PROCEDURE

Warranty Service Procedure

Outlines the warranty procedure for obtaining service or repairs.

Dometic SMX II Specifications

General IconGeneral
BrandDometic
ModelSMX II
CategoryIndustrial Equipment
LanguageEnglish

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