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It explains how the Titan microprocessor-based controller scans analog and digital inputs, issues ALERT or FAULT based on preset limits, controls discharge pressure via J1939 throttle communication to the engine ECM, and supports diagnostic troubleshooting. It also covers temperature sensor thermistors, pressure transducer 0.5–4.5 VDC signals, digital I/O behavior, and the Mini-Port operator display for monitoring.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/electronic-service-manual-compressor-models-compressor-diagnostic-code-troubleshooting/646554/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/electronic-service-manual-compressor-models-compressor-diagnostic-code-troubleshooting/646554.png","ImageObject",300,407,{"name":92,"@type":93},"dawugda","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-25","2026-10-23",true,{"@type":102,"interactionType":103,"userInteractionCount":14},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What is the Titan controller responsible for in the compressor system?","Question",{"text":112,"@type":113},"The Titan controller scans inputs at a fixed interval, issues ALERT or FAULT when values are out of range, controls compressor discharge pressure, and communicates diagnostic/control data via the J1939 CAN network.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How does the Titan controller regulate discharge pressure?",{"text":117,"@type":113},"The Titan monitors regulation system air pressure and varies engine throttle to maintain the setpoint discharge air pressure. The setpoint is adjusted via the pressure regulator (and dual pressure regulators for dual pressure options).",{"name":119,"@type":110,"acceptedAnswer":120},"What signals do temperature sensors and pressure transducers provide?",{"text":121,"@type":113},"Temperature sensors are thermistor-type devices whose resistance changes with temperature, which the Titan converts to a temperature value. Pressure transducers output 0.5 VDC to 4.5 VDC corresponding to 0 PSI up to the transducer’s maximum rating, with 5 VDC excitation from the Titan.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},646554,1792899835,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":14,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":144,"read_time":145},3985747870947,"https://ap-avatar.wpscdn.com/davatar_3d24733baf745e90a7e4bdd5f77d97b2","ELECTRONIC SERVICE MANUAL  \nCOMPRESSOR MODELS  \nHP450/VHP400WCU-T4F (F69)  \nP425/HP375WCU-T4F (F68)  \nDoosan Infracore Portable Power 1293 Glenway Drive Statesville, N.C. 28625 [DoosanPortablePower.com](DoosanPortablePower.com)  \nBook: 46668103 (2016) Rev C  \nTABLE OF CONTENTS  \nElectronic Service Manual  \nTITLE PAGE  \nGENERAL INFORMATION .................................................. 5  \nCOMPRESSOR OPERATION SEQUENCE..................................... 13  \nCOMPRESSOR DIAGNOSTIC CODE TROUBLESHOOTING ...................... 17  \nELECTRICAL CIRCUIT TROUBLESHOOTING ................................. 73  \nSYSTEM SCHEMATICS AND WIRING DIAGRAMS .............................. 89  \nELECTRICAL COMPONENT LOCATIONS ..................................... 97  \nELECTRICAL PARTS LIST ................................................. 101  \nIQ OPTION ............................................................. 117  \nTABLE OF CONTENTS  \nElectronic Service Manual  \nTITLE PAGE  \nGeneral Information  \nElectronic Service Manual General Information  \nOperational Theory  \nThe compressor has an electronic system using the Titan controller to provide discharge air pressure control and package monitoring functions. The electrical system connects all the necessary switches, sensors, and transducers to the Titan controller.  \nTitan Controller  \nThe Titan controller is the heart of the compressor monitoring and control system and provides data collection, package monitoring, and control functions for compressor operations. The Titan controller is a microprocessor-based controller with analog and digital inputs and outputs.  \nThe Titan controller is mounted on the liftbail on curb side of compressor.  \nThe first function of the Titan controller is to scan all inputs at a fixed interval. The analog values are compared to preset minimum and maximum values and an ALERT or FAULT is issued when a value is out of range. The various ALERTS and FAULTS are listed in the Compressor Diagnostic Code Troubleshooting section.  \nThe second function of the Titan controller is compressor discharge pressure control. The Titan monitors the regulation system air pressure and varies the engine throttle to maintain the setpoint discharge air pressure. The setpoint pressure is set by adjusting the pressure regulator. For compressors equipped with dual pressure option, the setpoint pressure for each mode is set by adjusting the high and low pressure regulators.  \nThe third function of the Titan controller is to communicate diagnostic and control information between the Titan, engine ECM, Engine Tach with Mini-Port display, and other optional controllers via the J1939 CAN network. The engine throttle setting is sent from the Titan to the engine ECM. Figure 1-1 shows the connection layout between the Titan controller and engine ECM.  \nTemperature Sensors and Pressure Transducers  \nThe electronics system uses temperature sensors and pressure transducers to monitor the compressor operation. The temperature sensors used to measure compressor temperatures are thermistor type devices. The resistance output of the temperature sensor changes with a corresponding temperature change of the parameter being monitored. The Titan controller receives the resistance value of the sensor and converts it to a temperature value. The Titan uses the temperature value to ensure the parameter being monitored is within its operating limits and relays the value to the Mini-Port display for operator viewing.  \nThe pressure sensors used to measure compressor pressures are transducer type devices. These sensors have an output signal range of 0.5 VDC to 4.5 VDC, where 0.5 VDC corresponds to 0 PSI and 4.5 VDC corresponds to the maximum PSI rating for a particular transducer. Pressure sensors are provided with 5 VDC excitation voltage from the Titan controller. Also, the sensor return or ground connects to the Titan controller. The output voltage of the pressure sensor changes with a corresponding pressure ch","cbCainPoIBLuOBaX","https://ap.wps.com/l/cbCainPoIBLuOBaX","pdf",2326768,127,"English","# General Information\n## Operational Theory\n## Titan Controller\n## Temperature Sensors and Pressure Transducers\n## Digital Inputs and Outputs\n## Controller Outputs\n## Pressure Control\n## Engine Electronic\n## Pressure Gauge w/Mini-Port Display","[{\"question\":\"What is the Titan controller responsible for in the compressor system?\",\"answer\":\"The Titan controller scans inputs at a fixed interval, issues ALERT or FAULT when values are out of range, controls compressor discharge pressure, and communicates diagnostic/control data via the J1939 CAN network.\"},{\"question\":\"How does the Titan controller regulate discharge pressure?\",\"answer\":\"The Titan monitors regulation system air pressure and varies engine throttle to maintain the setpoint discharge air pressure. The setpoint is adjusted via the pressure regulator (and dual pressure regulators for dual pressure options).\"},{\"question\":\"What signals do temperature sensors and pressure transducers provide?\",\"answer\":\"Temperature sensors are thermistor-type devices whose resistance changes with temperature, which the Titan converts to a temperature value. Pressure transducers output 0.5 VDC to 4.5 VDC corresponding to 0 PSI up to the transducer’s maximum rating, with 5 VDC excitation from the Titan.\"}]","Electronic Service Manual - Compressor Models - Compressor Diagnostic Code Troubleshooting | PDF",1792763970,320]