{"id":290936,"date":"2023-02-28T17:00:33","date_gmt":"2023-02-28T17:00:33","guid":{"rendered":"https:\/\/tpmatrix.co.uk\/?post_type=project&p=290936"},"modified":"2026-07-26T14:23:00","modified_gmt":"2026-07-26T13:23:00","slug":"resolucion-de-incidencias-termicas-en-unidades-de-control-de-puertas-dcu","status":"publish","type":"project","link":"https:\/\/tpmatrix.co.uk\/es\/project\/resolving-thermal-incidents-in-door-control-units-dcus\/","title":{"rendered":"Resoluci\u00f3n de incidentes t\u00e9rmicos en unidades de control de puertas (DCU)"},"content":{"rendered":"

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Project Summary<\/h4>\n

[\/et_pb_text][et_pb_text content_last_edited=”off|tablet” admin_label=”Title” _builder_version=”4.27.6″ _module_preset=”default” header_2_font=”–et_global_heading_font|700|||||||” header_2_text_align=”left” header_2_text_color=”#1F2532″ header_2_font_size=”36px” header_2_line_height=”1.2em” width=”100%” height=”1px” max_height=”1px” custom_margin=”0px||10px||false|false” custom_padding=”0px||0px||false|false” header_2_font_size_tablet=”34px” header_2_font_size_phone=”30px” header_2_font_size_last_edited=”on|phone” global_colors_info=”{}”][\/et_pb_text][et_pb_blurb use_icon=”on” font_icon=”||fa||900″ icon_color=”#00AF4D” icon_placement=”left” image_icon_width=”20px” content_max_width=”100%” module_class=”about-blurb flex-about” _builder_version=”4.27.6″ _module_preset=”default” header_font=”–et_global_heading_font|700|||||||” header_text_align=”left” header_text_color=”#1F2532″ header_font_size=”20px” header_line_height=”1.2em” body_font=”–et_global_body_font||||||||” body_text_align=”left” body_font_size=”17px” image_icon_custom_margin=”0px|4px|0px|0px|false|false” image_icon_custom_padding=”0px||0px||false|false” custom_margin=”||20px||false|false” custom_padding=”||0px||false|false” animation=”off” custom_css_main_element=”flex-grow: 1;||padding: 10px;||align-items: center;||flex-basis: 33%” custom_css_blurb_title=”margin-bottom:3px;” custom_css_blurb_content=”margin:0px;” locked=”off” global_colors_info=”{}”]<\/p>\n

Identified and eliminated the root cause of DCU thermal incidents<\/span><\/strong> – preventing overheating, smoke release and door operation failures.<\/p>\n

[\/et_pb_blurb][et_pb_blurb use_icon=”on” font_icon=”||fa||900″ icon_color=”#00AF4D” icon_placement=”left” image_icon_width=”20px” content_max_width=”100%” module_class=”about-blurb flex-about” _builder_version=”4.27.6″ _module_preset=”default” header_font=”–et_global_heading_font|700|||||||” header_text_align=”left” header_text_color=”#1F2532″ header_font_size=”20px” header_line_height=”1.2em” body_font=”–et_global_body_font||||||||” body_text_align=”left” body_font_size=”17px” image_icon_custom_margin=”0px|4px|0px|0px|false|false” image_icon_custom_padding=”0px||0px||false|false” custom_margin=”||20px||false|false” custom_padding=”||0px||false|false” animation=”off” custom_css_main_element=”flex-grow: 1;||padding: 10px;||align-items: center;||flex-basis: 33%” custom_css_blurb_title=”margin-bottom:3px;” custom_css_blurb_content=”margin:0px;” locked=”off” global_colors_info=”{}”]<\/p>\n

Designed and deployed a new power supply unit (PSU)<\/strong><\/span> – that improved thermal performance, communication stability and overall system reliability.<\/p>\n

[\/et_pb_blurb][et_pb_blurb use_icon=”on” font_icon=”||fa||900″ icon_color=”#00AF4D” icon_placement=”left” image_icon_width=”20px” content_max_width=”100%” module_class=”about-blurb flex-about” _builder_version=”4.27.6″ _module_preset=”default” header_font=”–et_global_heading_font|700|||||||” header_text_align=”left” header_text_color=”#1F2532″ header_font_size=”20px” header_line_height=”1.2em” body_font=”–et_global_body_font||||||||” body_text_align=”left” body_font_size=”17px” image_icon_custom_margin=”0px|4px|0px|0px|false|false” image_icon_custom_padding=”0px||0px||false|false” custom_margin=”||20px||false|false” custom_padding=”||0px||false|false” animation=”off” custom_css_main_element=”flex-grow: 1;||padding: 10px;||align-items: center;||flex-basis: 33%” custom_css_blurb_title=”margin-bottom:3px;” custom_css_blurb_content=”margin:0px;” locked=”off” global_colors_info=”{}”]<\/p>\n

Successfully overhauled more than 3,000 DCUs<\/strong><\/span> – enhancing passenger safety and reducing service disruptions across the fleet.<\/p>\n

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Background<\/h2>\n

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Background<\/h2>\n

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Background<\/h2>\n

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TP Matrix were contracted by a major train manufacturer to investigate and address a series of concerning incidents involving Door Control Units (DCUs) installed in their trains. These DCUs were experiencing numerous thermal incidents during operation that resulted in loss of door operation and the release of smoke into the door vestibule areas.<\/p>\n

Additionally, it was discovered that the same faulty components within the DCUs were also creating electrical noise issues which caused communication system disruptions. The railway operator identified these incidents as a critical safety concern and sought a comprehensive solution.<\/p>\n

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Investigation process<\/h2>\n

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Invesstigation process<\/h2>\n

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Investigation process<\/h2>\n

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TP Matrix Ltd initiated a thorough investigation to identify the root causes of the thermal incidents. The investigation spanned several months and involved multiple phases:<\/p>\n

[\/et_pb_text][et_pb_blurb title=”Initial Assessment” icon_placement=”left” image_icon_width=”20px” content_max_width=”100%” module_class=”about-blurb” _builder_version=”4.27.6″ _module_preset=”default” header_font=”–et_global_heading_font|700|||||||” header_text_align=”left” header_text_color=”#1F2532″ header_font_size=”20px” header_line_height=”1.2em” body_font=”–et_global_body_font||||||||” body_text_align=”left” body_font_size=”17px” image_icon_custom_margin=”0px|4px|0px|0px|false|false” image_icon_custom_padding=”0px||0px||false|false” custom_margin=”||30px||false|false” custom_margin_tablet=”||30px||false|false” custom_margin_phone=”||20px||false|false” custom_margin_last_edited=”on|desktop” custom_padding=”||0px||false|false” animation=”off” custom_css_blurb_title=”margin-bottom:3px;||margin-left: -10px;” custom_css_blurb_content=”margin:0px;” locked=”off” global_colors_info=”{}”]<\/p>\n

The TP Matrix team gathered information about the affected trains, the DCUs, and the incidents themselves. They reviewed technical documentation, fault reports, and maintenance records.<\/p>\n

[\/et_pb_blurb][et_pb_blurb title=”Testing” icon_placement=”left” image_icon_width=”20px” content_max_width=”100%” module_class=”about-blurb” _builder_version=”4.27.6″ _module_preset=”default” header_font=”–et_global_heading_font|700|||||||” header_text_align=”left” header_text_color=”#1F2532″ header_font_size=”20px” header_line_height=”1.2em” body_font=”–et_global_body_font||||||||” body_text_align=”left” body_font_size=”17px” image_icon_custom_margin=”0px|4px|0px|0px|false|false” image_icon_custom_padding=”0px||0px||false|false” custom_margin=”||30px||false|false” custom_margin_tablet=”||30px||false|false” custom_margin_phone=”||20px||false|false” custom_margin_last_edited=”on|phone” custom_padding=”||0px||false|false” animation=”off” custom_css_blurb_title=”margin-bottom:3px;||margin-left: -10px;” custom_css_blurb_content=”margin:0px;” locked=”off” global_colors_info=”{}”]<\/p>\n

The TP Matrix engineers performed comprehensive testing on sample DCUs. This included analysing power supply unit (PSU) performance, thermal behaviour, and communication stability. They replicated operating conditions to simulate on-board scenarios.<\/p>\n

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Through extensive testing and analysis, TP Matrix identified that the PSUs of the DCUs were operating below industry standards. These subpar PSUs were causing overheating, which led to the thermal incidents. The inadequate PSU design was also contributing to electrical noise issues and communication system disruptions.<\/p>\n

[\/et_pb_blurb][et_pb_blurb title=”Smoke Incidents” icon_placement=”left” image_icon_width=”20px” content_max_width=”100%” module_class=”about-blurb” _builder_version=”4.27.6″ _module_preset=”default” header_font=”–et_global_heading_font|700|||||||” header_text_align=”left” header_text_color=”#1F2532″ header_font_size=”20px” header_line_height=”1.2em” body_font=”–et_global_body_font||||||||” body_text_align=”left” body_font_size=”17px” image_icon_custom_margin=”0px|4px|0px|0px|false|false” image_icon_custom_padding=”0px||0px||false|false” custom_margin=”||20px||false|false” custom_padding=”||0px||false|false” animation=”off” custom_css_blurb_title=”margin-bottom:3px;||margin-left: -10px;” custom_css_blurb_content=”margin:0px;” locked=”off” global_colors_info=”{}”]<\/p>\n

The investigation revealed that the overheating PSUs were releasing smoke in train carriages during some incidents. This posed a significant safety risk to passengers and the overall operation of the railway system.<\/p>\n

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The solution<\/h2>\n

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The solution<\/h2>\n

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The solution<\/h2>\n

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Redesigning the PSU<\/strong><\/span> – TP Matrix\u2019s engineering team developed an improved PSU design that met and exceeded industry standards for performance, thermal management, and stability.<\/p>\n

[\/et_pb_blurb][et_pb_blurb use_icon=”on” font_icon=”||fa||900″ icon_color=”#00af4d” icon_placement=”left” image_icon_width=”20px” content_max_width=”100%” module_class=”about-blurb” _builder_version=”4.27.6″ _module_preset=”default” header_font=”–et_global_heading_font|700|||||||” header_text_align=”left” header_text_color=”#1F2532″ header_font_size=”20px” header_line_height=”1.2em” body_font=”–et_global_body_font||||||||” body_text_align=”left” body_font_size=”17px” image_icon_custom_margin=”0px|4px|0px|0px|false|false” image_icon_custom_padding=”0px||0px||false|false” custom_margin=”||30px||false|false” custom_margin_tablet=”||30px||false|false” custom_margin_phone=”||20px||false|false” custom_margin_last_edited=”on|phone” custom_padding=”||0px||false|false” animation=”off” custom_css_blurb_title=”margin-bottom:3px;” custom_css_blurb_content=”margin:0px;” locked=”off” global_colors_info=”{}”]<\/p>\n

Testing and validation<\/strong><\/span> – The redesigned PSU underwent rigorous testing, including EMC, Shock & Vibration testing, to ensure its reliability and safety under various operating conditions. Eight of the new PSUs were fitted to DCUs and were successfully trialled on two fleets in 2018 without any issues.<\/p>\n

[\/et_pb_blurb][et_pb_blurb use_icon=”on” font_icon=”||fa||900″ icon_color=”#00af4d” icon_placement=”left” image_icon_width=”20px” content_max_width=”100%” module_class=”about-blurb” _builder_version=”4.27.6″ _module_preset=”default” header_font=”–et_global_heading_font|700|||||||” header_text_align=”left” header_text_color=”#1F2532″ header_font_size=”20px” header_line_height=”1.2em” body_font=”–et_global_body_font||||||||” body_text_align=”left” body_font_size=”17px” image_icon_custom_margin=”0px|4px|0px|0px|false|false” image_icon_custom_padding=”0px||0px||false|false” custom_margin=”||30px||false|false” custom_padding=”||0px||false|false” animation=”off” custom_css_blurb_title=”margin-bottom:3px;” custom_css_blurb_content=”margin:0px;” locked=”off” global_colors_info=”{}”]<\/p>\n

Rollout Plan<\/strong><\/span> – TP Matrix collaborated closely with their customer to establish a phased rollout plan for the new PSU design. So far over 3,000 units have been successfully overhauled to include replacing the PSU along with replacing ageing components in the units (capacitors, relays etc.) to improve the overall performance and reliability of the DCUs.<\/p>\n

[\/et_pb_blurb][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ custom_padding_last_edited=”on|desktop” _builder_version=”4.27.6″ _module_preset=”default” background_color=”#F4F4F4″ background_enable_image=”off” background_size=”initial” overflow-x=”hidden” overflow-y=”hidden” custom_margin=”0px||0px||false|false” custom_padding=”80px||80px||false|false” custom_padding_tablet=”60px||60px||true|false” custom_padding_phone=”60px||60px||true|false” locked=”off” global_colors_info=”{}”][et_pb_row use_custom_gutter=”on” gutter_width=”1″ make_equal=”on” admin_label=”Results” module_class=”insurance-11-inlbtn-sc” _builder_version=”4.27.6″ _module_preset=”default” width=”90%” max_width=”1296px” max_width_tablet=”1296px” max_width_phone=”1296px” max_width_last_edited=”on|desktop” custom_margin=”0px||0px||false|false” custom_margin_tablet=”||0px||false|false” custom_margin_phone=”||0px||false|false” custom_margin_last_edited=”off|phone” custom_padding=”0px||0px||false|false” animation_style=”fade” animation_delay=”500ms” animation_speed_curve=”ease” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.27.6″ _module_preset=”default” custom_padding=”||||false|false” custom_padding_tablet=”||||false|false” custom_padding_phone=”||||false|false” custom_padding_last_edited=”on|phone” custom_css_main_element=”display: flex;||flex-flow: row wrap;” global_colors_info=”{}”][et_pb_text content_tablet=”<\/p>\n

Results<\/h2>\n

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Results<\/h2>\n

” content_last_edited=”on|desktop” admin_label=”Title” _builder_version=”4.27.6″ _module_preset=”default” header_2_font=”–et_global_heading_font|700|||||||” header_2_text_align=”left” header_2_text_color=”#1F2532″ header_2_font_size=”36px” header_2_line_height=”1.2em” width=”100%” custom_margin=”0px||15px||false|false” custom_padding=”0px||0px||false|false” header_2_font_size_tablet=”34px” header_2_font_size_phone=”30px” header_2_font_size_last_edited=”on|phone” global_colors_info=”{}”]<\/p>\n

Results<\/h2>\n

[\/et_pb_text][et_pb_text _builder_version=”4.27.6″ _module_preset=”default” text_font=”–et_global_body_font||||||||” text_font_size=”17px” link_text_color=”#00AF4D” width=”100%” custom_margin=”0px||31px||false|false” custom_padding=”0px||0px||false|false” global_colors_info=”{}” link_text_color__hover_enabled=”on|hover” link_text_color__hover=”#1F2532″]<\/p>\n

The collaboration between TP Matrix Ltd and their customer has yielded impressive results:<\/p>\n

[\/et_pb_text][et_pb_blurb use_icon=”on” font_icon=”||fa||900″ icon_color=”#00af4d” icon_placement=”left” image_icon_width=”20px” content_max_width=”100%” module_class=”about-blurb pro-flex” _builder_version=”4.27.6″ _module_preset=”default” header_font=”–et_global_heading_font|700|||||||” header_text_align=”left” header_text_color=”#1F2532″ header_font_size=”20px” header_line_height=”1.2em” body_font=”–et_global_body_font||||||||” body_text_align=”left” body_font_size=”17px” image_icon_custom_margin=”0px|4px|0px|0px|false|false” image_icon_custom_padding=”0px||0px||false|false” custom_margin=”||30px||false|false” custom_margin_tablet=”||30px||false|false” custom_margin_phone=”||20px||false|false” custom_margin_last_edited=”on|phone” custom_padding=”||0px||false|false” animation=”off” custom_css_main_element=”flex-grow: 1;||padding: 10px;||align-items: center;||flex-basis: 50%;” custom_css_blurb_title=”margin-bottom:3px;” custom_css_blurb_content=”margin:0px;” locked=”off” global_colors_info=”{}”]<\/p>\n

Incident reduction<\/strong><\/span> – The new PSU design ended the occurrence of thermal incidents in the DCUs, eliminating overheating-related smoke and noise issues.<\/p>\n

[\/et_pb_blurb][et_pb_blurb use_icon=”on” font_icon=”||fa||900″ icon_color=”#00af4d” icon_placement=”left” image_icon_width=”20px” content_max_width=”100%” module_class=”about-blurb pro-flex” _builder_version=”4.27.6″ _module_preset=”default” header_font=”–et_global_heading_font|700|||||||” header_text_align=”left” header_text_color=”#1F2532″ header_font_size=”20px” header_line_height=”1.2em” body_font=”–et_global_body_font||||||||” body_text_align=”left” body_font_size=”17px” image_icon_custom_margin=”0px|4px|0px|0px|false|false” image_icon_custom_padding=”0px||0px||false|false” custom_margin=”||30px||false|false” custom_margin_tablet=”||30px||false|false” custom_margin_phone=”||20px||false|false” custom_margin_last_edited=”on|phone” custom_padding=”||0px||false|false” animation=”off” custom_css_main_element=”flex-grow: 1;||padding: 10px;||align-items: center;||flex-basis: 50%;” custom_css_blurb_title=”margin-bottom:3px;” custom_css_blurb_content=”margin:0px;” locked=”off” global_colors_info=”{}”]<\/p>\n

Improved communication<\/strong><\/span> – The enhanced PSU design positively impacted the communication systems within the trains, reducing disruptions and ensuring smoother operations.<\/p>\n

[\/et_pb_blurb][et_pb_blurb use_icon=”on” font_icon=”||fa||900″ icon_color=”#00af4d” icon_placement=”left” image_icon_width=”20px” content_max_width=”100%” module_class=”about-blurb pro-flex” _builder_version=”4.27.6″ _module_preset=”default” header_font=”–et_global_heading_font|700|||||||” header_text_align=”left” header_text_color=”#1F2532″ header_font_size=”20px” header_line_height=”1.2em” body_font=”–et_global_body_font||||||||” body_text_align=”left” body_font_size=”17px” image_icon_custom_margin=”0px|4px|0px|0px|false|false” image_icon_custom_padding=”0px||0px||false|false” custom_margin=”||30px||false|false” custom_margin_tablet=”||30px||false|false” custom_margin_phone=”||20px||false|false” custom_margin_last_edited=”on|phone” custom_padding=”||0px||false|false” animation=”off” custom_css_main_element=”flex-grow: 1;||padding: 10px;||align-items: center;||flex-basis: 50%;” custom_css_blurb_title=”margin-bottom:3px;” custom_css_blurb_content=”margin:0px;” locked=”off” global_colors_info=”{}”]<\/p>\n

Passenger safety<\/strong><\/span> – The elimination of smoke incidents improved passenger safety and onboard experience.<\/p>\n

[\/et_pb_blurb][et_pb_blurb use_icon=”on” font_icon=”||fa||900″ icon_color=”#00af4d” icon_placement=”left” image_icon_width=”20px” content_max_width=”100%” module_class=”about-blurb pro-flex” _builder_version=”4.27.6″ _module_preset=”default” header_font=”–et_global_heading_font|700|||||||” header_text_align=”left” header_text_color=”#1F2532″ header_font_size=”20px” header_line_height=”1.2em” body_font=”–et_global_body_font||||||||” body_text_align=”left” body_font_size=”17px” image_icon_custom_margin=”0px|4px|0px|0px|false|false” image_icon_custom_padding=”0px||0px||false|false” custom_margin=”||30px||false|false” custom_margin_tablet=”||30px||false|false” custom_margin_phone=”||20px||false|false” custom_margin_last_edited=”on|phone” custom_padding=”||0px||false|false” animation=”off” custom_css_main_element=”flex-grow: 1;||padding: 10px;||align-items: center;||flex-basis: 50%;” custom_css_blurb_title=”margin-bottom:3px;” custom_css_blurb_content=”margin:0px;” locked=”off” global_colors_info=”{}”]<\/p>\n

Operational efficiency<\/strong><\/span> – With the implementation of the redesigned PSUs, the train operator has experienced fewer service disruptions and improved overall system reliability.<\/p>\n

[\/et_pb_blurb][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”1_2,1_2″ use_custom_gutter=”on” gutter_width=”2″ _builder_version=”4.27.6″ _module_preset=”default” width=”90%” width_tablet=”90%” width_phone=”90%” width_last_edited=”on|phone” max_width=”1296px” custom_margin=”||0px||false|false” custom_padding=”||0px||false|false” global_colors_info=”{}”][et_pb_column type=”1_2″ _builder_version=”4.27.6″ _module_preset=”default” global_colors_info=”{}”][et_pb_image src=”https:\/\/tpmatrix.co.uk\/wp-content\/uploads\/2026\/06\/Overhauled-DCU.jpg” title_text=”Overhauled-DCU” force_fullwidth=”on” _builder_version=”4.27.6″ _module_preset=”default” max_width_tablet=”526px” max_width_phone=”88%” max_width_last_edited=”on|phone” custom_margin=”0px||30px||false|false” custom_padding=”0px||0px||false|false” sticky_limit_bottom=”row” sticky_position_tablet=”none” sticky_position_phone=”none” sticky_position_last_edited=”on|desktop” border_radii=”on|8px|8px|8px|8px” global_colors_info=”{}”][\/et_pb_image][\/et_pb_column][et_pb_column type=”1_2″ _builder_version=”4.27.6″ _module_preset=”default” global_colors_info=”{}”][et_pb_image src=”https:\/\/tpmatrix.co.uk\/wp-content\/uploads\/2026\/06\/Overhauled-DCU-2.jpg” title_text=”Overhauled-DCU-2″ force_fullwidth=”on” _builder_version=”4.27.6″ _module_preset=”default” max_width_tablet=”526px” max_width_phone=”88%” max_width_last_edited=”on|phone” custom_margin=”0px||0px||false|false” custom_padding=”0px||0px||false|false” sticky_limit_bottom=”row” sticky_position_tablet=”none” sticky_position_phone=”none” sticky_position_last_edited=”on|desktop” border_radii=”on|8px|8px|8px|8px” global_colors_info=”{}”][\/et_pb_image][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ _builder_version=”4.27.6″ _module_preset=”default” global_colors_info=”{}”][et_pb_row _builder_version=”4.27.6″ _module_preset=”default” width=”90%” width_tablet=”90%” width_phone=”90%” width_last_edited=”on|tablet” max_width=”1296px” max_width_tablet=”1296px” max_width_phone=”1296px” max_width_last_edited=”on|phone” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.27.6″ _module_preset=”default” global_colors_info=”{}”][et_pb_text module_class=”feedback” _builder_version=”4.27.6″ _module_preset=”default” text_font=”–et_global_body_font|600|||||||” text_text_color=”#1F2532″ text_font_size=”17px” text_line_height=”1.8em” link_text_color=”#00AF4D” header_4_font=”|600|||||||” header_4_line_height=”1.4em” custom_margin=”0px||50px||false|false” custom_margin_phone=”0px||40px||false|false” custom_margin_last_edited=”off|desktop” custom_padding=”0px|||25px|false|false” custom_css_free_form=”.feedback h4{|| margin-top: 25px;||}” border_width_left=”5px” border_color_left=”#00AF4D” global_colors_info=”{}” link_text_color__hover_enabled=”on|hover” link_text_color__hover=”#1F2532″]<\/p>\n

Over the term of the overhaul TP Matrix Ltd have monitored a trend of failures in the communications circuitry. In collaboration with our customer, we offered a solution to this issue which, once approved, reduced the failure rate significantly. This was subsequently incorporated into the overhaul and repair projects. TP Matrix Ltd continuously strives to improve the lifespan of our customers\u2019 products and endeavours to offer continuous improvement to enable this to happen.<\/p>\n

[\/et_pb_text][et_pb_text content_tablet=”<\/p>\n

Conclusion<\/h2>\n

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Conclusion<\/h2>\n

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Conclusion<\/h2>\n

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TP Matrix\u2019s diligent investigation into the thermal incidents of the Door Control Units showcases our technical expertise and commitment to safety. Through a combination of meticulous analysis, innovative redesign, and strategic implementation, we are successfully resolving the issues, ensuring the continued safe and reliable operation of vehicles for our customer.<\/p>\n

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Project SummaryIdentified and eliminated the root cause of DCU thermal incidents – preventing overheating, smoke release and door operation failures.Designed and deployed a new power supply unit (PSU) – that improved thermal performance, communication stability and overall system reliability.Successfully overhauled more than 3,000 DCUs – enhancing passenger safety and reducing service disruptions across the fleet.BackgroundTP Matrix were contracted by a major train manufacturer to investigate and address a series of concerning incidents involving Door Control Units (DCUs) installed in their trains. These DCUs were experiencing numerous thermal incidents during operation that resulted in loss of door operation and the release of smoke into the door vestibule areas. Additionally, it was discovered that the same faulty components within the DCUs were also creating electrical noise issues which caused communication system disruptions. The railway operator identified these incidents as a critical safety concern and sought a comprehensive solution.Investigation processTP Matrix Ltd initiated a thorough investigation to identify the root causes of the thermal incidents. The investigation spanned several months and involved multiple phases:The TP Matrix team gathered information about the affected trains, the DCUs, and the incidents themselves. They reviewed technical documentation, fault reports, and maintenance records.The TP Matrix engineers performed comprehensive […]<\/p>\n","protected":false},"author":1,"featured_media":290946,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"project_category":[],"project_tag":[],"class_list":["post-290936","project","type-project","status-publish","has-post-thumbnail","hentry"],"yoast_head":"\nResolving Thermal Incidents in Door Control Units (DCUs) | TP Matrix<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/tpmatrix.co.uk\/es\/proyecto\/resolucion-de-incidencias-termicas-en-unidades-de-control-de-puertas-dcu\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Resolving Thermal Incidents in Door Control Units (DCUs) | TP Matrix\" \/>\n<meta property=\"og:description\" content=\"Project SummaryIdentified and eliminated the root cause of DCU thermal incidents - preventing overheating, smoke release and door operation failures.Designed and deployed a new power supply unit (PSU) - that improved thermal performance, communication stability and overall system reliability.Successfully overhauled more than 3,000 DCUs - enhancing passenger safety and reducing service disruptions across the fleet.BackgroundTP Matrix were contracted by a major train manufacturer to investigate and address a series of concerning incidents involving Door Control Units (DCUs) installed in their trains. These DCUs were experiencing numerous thermal incidents during operation that resulted in loss of door operation and the release of smoke into the door vestibule areas. Additionally, it was discovered that the same faulty components within the DCUs were also creating electrical noise issues which caused communication system disruptions. The railway operator identified these incidents as a critical safety concern and sought a comprehensive solution.Investigation processTP Matrix Ltd initiated a thorough investigation to identify the root causes of the thermal incidents. The investigation spanned several months and involved multiple phases:The TP Matrix team gathered information about the affected trains, the DCUs, and the incidents themselves. They reviewed technical documentation, fault reports, and maintenance records.The TP Matrix engineers performed comprehensive […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/tpmatrix.co.uk\/es\/proyecto\/resolucion-de-incidencias-termicas-en-unidades-de-control-de-puertas-dcu\/\" \/>\n<meta property=\"og:site_name\" content=\"TP Matrix\" \/>\n<meta property=\"article:modified_time\" content=\"2026-07-26T13:23:00+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/tpmatrix.co.uk\/wp-content\/uploads\/2026\/06\/Thermal-Damaged-DC-Unit-400x284-1.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"400\" \/>\n\t<meta property=\"og:image:height\" content=\"284\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Tiempo de lectura\" \/>\n\t<meta name=\"twitter:data1\" content=\"5 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/tpmatrix.co.uk\\\/project\\\/resolving-thermal-incidents-in-door-control-units-dcus\\\/\",\"url\":\"https:\\\/\\\/tpmatrix.co.uk\\\/project\\\/resolving-thermal-incidents-in-door-control-units-dcus\\\/\",\"name\":\"Resolving Thermal Incidents in Door Control Units (DCUs) | TP Matrix\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/tpmatrix.co.uk\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/tpmatrix.co.uk\\\/project\\\/resolving-thermal-incidents-in-door-control-units-dcus\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/tpmatrix.co.uk\\\/project\\\/resolving-thermal-incidents-in-door-control-units-dcus\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/tpmatrix.co.uk\\\/wp-content\\\/uploads\\\/2026\\\/06\\\/Thermal-Damaged-DC-Unit-400x284-1.jpg\",\"datePublished\":\"2023-02-28T17:00:33+00:00\",\"dateModified\":\"2026-07-26T13:23:00+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/tpmatrix.co.uk\\\/project\\\/resolving-thermal-incidents-in-door-control-units-dcus\\\/#breadcrumb\"},\"inLanguage\":\"es\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/tpmatrix.co.uk\\\/project\\\/resolving-thermal-incidents-in-door-control-units-dcus\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"es\",\"@id\":\"https:\\\/\\\/tpmatrix.co.uk\\\/project\\\/resolving-thermal-incidents-in-door-control-units-dcus\\\/#primaryimage\",\"url\":\"https:\\\/\\\/tpmatrix.co.uk\\\/wp-content\\\/uploads\\\/2026\\\/06\\\/Thermal-Damaged-DC-Unit-400x284-1.jpg\",\"contentUrl\":\"https:\\\/\\\/tpmatrix.co.uk\\\/wp-content\\\/uploads\\\/2026\\\/06\\\/Thermal-Damaged-DC-Unit-400x284-1.jpg\",\"width\":400,\"height\":284},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/tpmatrix.co.uk\\\/project\\\/resolving-thermal-incidents-in-door-control-units-dcus\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/tpmatrix.co.uk\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Projects\",\"item\":\"https:\\\/\\\/tpmatrix.co.uk\\\/project\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Resolving Thermal Incidents in Door Control Units (DCUs)\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/tpmatrix.co.uk\\\/#website\",\"url\":\"https:\\\/\\\/tpmatrix.co.uk\\\/\",\"name\":\"TP Matrix\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/tpmatrix.co.uk\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"es\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Resoluci\u00f3n de incidentes t\u00e9rmicos en unidades de control de puertas (DCU) | Matriz de TP","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/tpmatrix.co.uk\/es\/proyecto\/resolucion-de-incidencias-termicas-en-unidades-de-control-de-puertas-dcu\/","og_locale":"es_ES","og_type":"article","og_title":"Resolving Thermal Incidents in Door Control Units (DCUs) | TP Matrix","og_description":"Project SummaryIdentified and eliminated the root cause of DCU thermal incidents - preventing overheating, smoke release and door operation failures.Designed and deployed a new power supply unit (PSU) - that improved thermal performance, communication stability and overall system reliability.Successfully overhauled more than 3,000 DCUs - enhancing passenger safety and reducing service disruptions across the fleet.BackgroundTP Matrix were contracted by a major train manufacturer to investigate and address a series of concerning incidents involving Door Control Units (DCUs) installed in their trains. These DCUs were experiencing numerous thermal incidents during operation that resulted in loss of door operation and the release of smoke into the door vestibule areas. Additionally, it was discovered that the same faulty components within the DCUs were also creating electrical noise issues which caused communication system disruptions. The railway operator identified these incidents as a critical safety concern and sought a comprehensive solution.Investigation processTP Matrix Ltd initiated a thorough investigation to identify the root causes of the thermal incidents. The investigation spanned several months and involved multiple phases:The TP Matrix team gathered information about the affected trains, the DCUs, and the incidents themselves. 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