York 031-01472-000 Board

The York 031-01472-000 SCR Trigger Board is the OEM silicon controlled rectifier (SCR) trigger board that York's own renewal parts documentation lists for its York variable speed drives (VSD), the drives used with York YK and YT style centrifugal chillers. In York's variable speed drive parts list, 031-01472-000 appears as the SCR Trigger Board on the 351 HP and 503 HP drives (292 HP and 419 HP at 50 Hz) and again on the 790 HP and 1100 HP drives (658 HP and 900 HP at 50 Hz), with the same part number shown for both sizes in each pair. That makes it a large-frame chiller drive board, not a generic gate-drive card, and it should be ordered by the complete number printed on the board you are replacing.

Silicon controlled rectifiers (SCRs) only conduct when a gate pulse tells them to, so the trigger board is what supplies the timed gate firing signals to the SCR power devices in the drive. When the board is healthy, the SCRs switch cleanly and in step with the incoming three-phase line. When it is not, the drive can fail to start, fault out on the chiller control panel, or run with unstable power conversion. Because the board sits between the drive's control logic and its high-power SCR section, it is one of the first components technicians suspect when a York variable speed drive will not come up after power-up or trips repeatedly on SCR-related faults. Other York SCR trigger boards carry different numbers, such as 031-02060-001 and 031-02060-002, and boards in the 031-01472 family are also seen with a -001 suffix (031-01472-001), so always match the complete part number on the original board.

Before replacing the board, confirm the basics: the incoming three-phase voltage and fuses, the seating of every harness and ribbon connector, and the condition of the SCRs themselves, since a shorted SCR can damage a new trigger board. Look for burned traces, discolored components, cracked solder joints and corroded connectors on the old board. Work only with the drive locked out and tagged out, wait for the DC bus capacitors to discharge and verify zero volts with a meter, handle the board with anti-static precautions, and photograph every connector before disconnecting so the new 031-01472-000 goes back exactly as the original was wired. This is work for a qualified technician familiar with chiller variable speed drives.

Key Benefits

• York Part Number 031-01472-000: This is the number York's own variable speed drive parts list uses for the SCR Trigger Board, so you are matching the factory part rather than a generic gate-drive board.
• Listed Across 351 to 1100 HP Drives: York lists the same 031-01472-000 board on the 351 HP, 503 HP, 790 HP and 1100 HP drives and their 50 Hz equivalents, which simplifies ordering across the range.
• Restores Gate Firing: A new trigger board delivers clean, correctly timed SCR gate pulses, which is what a drive that will not start or keeps faulting on the SCR section needs from this board.
• Built for Chiller Drives: Made for York YK and YT style chiller VSDs, so the form, connectors and signal levels match the equipment instead of being adapted from a general-purpose board.

Common Questions

• What does the 031-01472-000 do? It is the SCR trigger board in the York variable speed drive. It sends the gate firing pulses that switch the drive's SCR power devices on at the correct moment.
• Which drives is it listed for? York's variable speed drive renewal parts list shows 031-01472-000 for the 351 HP, 503 HP, 790 HP and 1100 HP drives (292 HP, 419 HP, 658 HP and 900 HP at 50 Hz). The list also separates drive styles and revisions, so confirm your drive's model and serial number and the number on the board you are removing.
• Is 031-01472-001 the same board? Boards in this family also appear with a -001 suffix. Match the full part number printed on your existing board, and contact us with the drive's model and serial number if the numbers differ.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.