{"product_id":"kostal-piko-dc-trennstelle-dc-disconnect-board-3-string-1","title":"KOSTAL PIKO DC-Trennstelle | DC Disconnect Board | 3-String","description":"\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv dir=\"auto\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"fbskMG_root markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003ch3 class=\"PDq2pG_selectionAnchorContainer\"\u003e\n\u003cspan role=\"text\"\u003e\u003cstrong\u003eDescription\u003c\/strong\u003e\u003c\/span\u003e\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eUsed product.\u003c\/strong\u003e Original \u003cstrong\u003eKOSTAL PIKO DC-TRENNSTELLE\u003c\/strong\u003e electronic board, namely the \u003cstrong\u003eelectronic board of the DC disconnect\/interruption section\u003c\/strong\u003e of the KOSTAL PIKO photovoltaic inverter. This is not simply a manual switch: the PCB electronically manages the \u003cstrong\u003econnection and disconnection of the DC photovoltaic strings\u003c\/strong\u003e through power relays and dedicated power supply, control, and driver circuits.\u003cbr\u003eThe photographed board is in the \u003cstrong\u003e3-String\u003c\/strong\u003e configuration and features \u003cstrong\u003ethree power relays\u003c\/strong\u003e, three \u003cstrong\u003eIN\/OUT\u003c\/strong\u003e connection sections, a switching power supply circuit, transformers, protection components, and electronic control circuits.\u003c\/p\u003e\n\u003ch3\u003e\u003cspan role=\"text\"\u003e⚙️ \u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e KOSTAL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e \u003cstrong\u003eDC-TRENNSTELLE\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e electronic board for \u003cstrong\u003eDC circuit disconnection and management\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhotographed configuration:\u003c\/strong\u003e \u003cstrong\u003e3-String\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower relays:\u003c\/strong\u003e \u003cstrong\u003e3\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower connections:\u003c\/strong\u003e \u003cstrong\u003eIN \/ OUT\u003c\/strong\u003e sections\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnectors:\u003c\/strong\u003e \u003cstrong\u003eX2, X3, X5, X6, X7\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuxiliary power supply:\u003c\/strong\u003e integrated on the PCB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRelay control circuit:\u003c\/strong\u003e integrated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwitching power supply:\u003c\/strong\u003e integrated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTransformer:\u003c\/strong\u003e present\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectrolytic capacitors:\u003c\/strong\u003e present in the power supply section\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiodes and protection components:\u003c\/strong\u003e integrated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl ICs:\u003c\/strong\u003e present on the board\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e industrial PCB with power supply, control, and DC section disconnect circuits.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan role=\"text\"\u003e⚡ \u003cstrong\u003eFunction in the Photovoltaic System\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eDC-Trennstelle\u003c\/strong\u003e is the electronic section of the inverter responsible for \u003cstrong\u003eenabling or interrupting the DC current path coming from the photovoltaic strings\u003c\/strong\u003e.\u003cbr\u003eDuring KOSTAL PIKO startup, the board receives its auxiliary power supply and manages the control sequence of the \u003cstrong\u003eDC relays\u003c\/strong\u003e. Correct operation of the board therefore allows the voltage coming from the photovoltaic panels to be correctly managed and transferred to the subsequent inverter sections.\u003cbr\u003eA malfunction of the DC-Trennstelle can therefore prevent the PIKO from completing startup \u003cstrong\u003eeven when photovoltaic voltage is present\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003e\u003cspan role=\"text\"\u003e🔧 \u003cstrong\u003eFaults, Errors \u0026amp; Symptoms\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eA fault in the \u003cstrong\u003eDC-Trennstelle\u003c\/strong\u003e may be particularly associated with \u003cstrong\u003estartup and DC circuit enabling problems\u003c\/strong\u003e.\u003cbr\u003ePossible symptoms include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003einverter remaining \u003cstrong\u003e“Aus \/ Off”\u003c\/strong\u003e;\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDC voltage from the panels present but startup failing\u003c\/strong\u003e;\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDC relays failing to switch\u003c\/strong\u003e;\u003c\/li\u003e\n\u003cli\u003erelays producing \u003cstrong\u003erepeated clicks\u003c\/strong\u003e during startup;\u003c\/li\u003e\n\u003cli\u003efailure to complete the initialization sequence;\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e“XXX”\u003c\/strong\u003e displayed during the startup phase;\u003c\/li\u003e\n\u003cli\u003eDC\/AC values not correctly available on the display during initialization;\u003c\/li\u003e\n\u003cli\u003eLEDs behaving abnormally;\u003c\/li\u003e\n\u003cli\u003einverter failing to perform a normal restart;\u003c\/li\u003e\n\u003cli\u003eintermittent operation;\u003c\/li\u003e\n\u003cli\u003efailure to correctly transfer DC voltage to the subsequent stage.\u003cbr\u003eIn particular, the condition in which the PIKO remains switched off or displays \u003cstrong\u003e“XXX” despite photovoltaic voltage being present\u003c\/strong\u003e is a symptom compatible with a DC-Trennstelle problem.\u003cbr\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e “XXX” does not exclusively identify a DC-Trennstelle fault. The same behavior can be caused by other inverter sections; diagnosis must therefore be performed by checking the entire system.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan role=\"text\"\u003e🛠️ \u003cstrong\u003eComponent-Level Faults \u0026amp; Repair\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eDC-Trennstelle can be repaired at electronic component level\u003c\/strong\u003e, making it a particularly interesting replacement for recovering PIKO inverters of this generation.\u003cbr\u003eAmong the components to be checked in the power supply section are particularly important:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eC4 – electrolytic capacitor\u003c\/strong\u003e, subject to loss of capacitance with aging;\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eD10 – diode\u003c\/strong\u003e in the power supply\/switching section;\u003c\/li\u003e\n\u003cli\u003eother electrolytic capacitors;\u003c\/li\u003e\n\u003cli\u003ediodes and protection components;\u003c\/li\u003e\n\u003cli\u003eswitching circuit transistors;\u003c\/li\u003e\n\u003cli\u003epower supply transformer;\u003c\/li\u003e\n\u003cli\u003eauxiliary power supplies;\u003c\/li\u003e\n\u003cli\u003erelay driver circuits;\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ecoils and contacts of the three relays\u003c\/strong\u003e;\u003c\/li\u003e\n\u003cli\u003esolder joints and tracks;\u003c\/li\u003e\n\u003cli\u003econnectors and wiring;\u003c\/li\u003e\n\u003cli\u003econtrol and feedback circuits.\u003cbr\u003eA \u003cstrong\u003edegraded C4 capacitor\u003c\/strong\u003e can cause unstable power supply to the board and prevent correct relay energization. Problems associated with \u003cstrong\u003eD10\u003c\/strong\u003e in the same electronic section have also been documented.\u003cbr\u003eRepair can therefore be aimed at restoring conditions such as \u003cstrong\u003estartup failure, relays not switching, intermittent startup, and incorrect management of the DC circuit\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan role=\"text\"\u003e🌐 \u003cstrong\u003eCompatibility \u0026amp; Applications\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eThe board belongs to the family of \u003cstrong\u003eDC-Trennstelle boards used in first-generation KOSTAL PIKO DCS\u003c\/strong\u003e.\u003cbr\u003eIt is used in various versions of the \u003cstrong\u003eKOSTAL PIKO\u003c\/strong\u003e series, including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003ePIKO 3.0\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003ePIKO 3.6\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003ePIKO 4.2\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePIKO 5.5\u003c\/strong\u003e\u003cbr\u003eCompatibility must nevertheless be verified before replacement by comparing the \u003cstrong\u003einverter model, PANEL, BOARD, board revision, and string configuration\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan role=\"text\"\u003e🏭 \u003cstrong\u003eConstruction \u0026amp; Product Condition\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eThe board is \u003cstrong\u003eused\u003c\/strong\u003e and shows normal signs resulting from previous installation and handling.\u003cbr\u003eThe photographs show the main DC-Trennstelle components, including \u003cstrong\u003ethe three power relays, transformer, switching circuit, capacitors, diodes, integrated circuits, connectors, and wiring\u003c\/strong\u003e.\u003cbr\u003eThe PCB appears structurally intact from the photographs and shows no evident extensive burns or generalized damage.\u003c\/p\u003e\n\u003ch3\u003e\u003cspan role=\"text\"\u003e🛡️ \u003cstrong\u003eSafety\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eThe DC-Trennstelle operates directly in the \u003cstrong\u003ephotovoltaic DC section of the inverter\u003c\/strong\u003e, where \u003cstrong\u003ehigh and potentially lethal voltages\u003c\/strong\u003e may be present even with the AC grid disconnected.\u003cbr\u003eReplacement, repair, and testing must be performed exclusively by \u003cstrong\u003equalified personnel\u003c\/strong\u003e, using the correct safety procedures for securing the inverter and photovoltaic generator.\u003cbr\u003eAfter work on the board, \u003cstrong\u003einsulation, connections, tightening, revision compatibility, and operation of the complete inverter\u003c\/strong\u003e must be correctly verified.\u003c\/p\u003e\n\u003ch3\u003e\u003cspan role=\"text\"\u003e📦 \u003cstrong\u003ePackage Contents\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e1 × original KOSTAL PIKO DC-TRENNSTELLE electronic board\u003c\/strong\u003e, as shown in the photographs.\u003c\/p\u003e\n\u003ch3\u003e\u003cspan role=\"text\"\u003e🚀 \u003cstrong\u003eFinal Description\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eKOSTAL PIKO DC-Trennstelle\u003c\/strong\u003e is the \u003cstrong\u003eelectronic board of the inverter's DC disconnect section\u003c\/strong\u003e, responsible for the electronic management of the photovoltaic strings and control of the related \u003cstrong\u003epower relays\u003c\/strong\u003e.\u003cbr\u003eThe photographed PCB is a \u003cstrong\u003e3-String\u003c\/strong\u003e version with \u003cstrong\u003ethree relays\u003c\/strong\u003e, switching power supply circuitry, transformers, protection components, and control circuits. It is a particularly useful replacement for repairing KOSTAL PIKO inverters presenting \u003cstrong\u003ean inverter switched off with PV voltage present, relays failing to switch, startup failure, intermittent restarts, or “XXX” displayed during the initialization phase\u003c\/strong\u003e.\u003cbr\u003eFor repair, particular attention should be given to the \u003cstrong\u003eswitching power supply, C4, D10, electrolytic capacitors, diodes, transistors, relays, and solder joints\u003c\/strong\u003e. Replacing faulty components may allow recovery of the DC-Trennstelle without necessarily replacing the entire board.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kostal Piko","offers":[{"title":"Default Title","offer_id":54708120944973,"sku":null,"price":350.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0802\/3274\/3245\/files\/MG_6780.jpg?v=1789061195","url":"https:\/\/greenenergy-repair.com\/bg\/products\/kostal-piko-dc-trennstelle-dc-disconnect-board-3-string-1","provider":"Green Energy","version":"1.0","type":"link"}