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nicholspamelaJul 25, 2025
How to troubleshoot a York YCAS with no display on the panel and that won't start?
- CcraignathanJul 25, 2025
If there is no display on the control panel and the York Chiller won't start, here's what you can check: * Ensure the main power supply to the control system is switched on. * Verify that the emergency stop switch on the control panel and any remote emergency stop devices are in the ON position. * Inspect the mains supply in case of an undervoltage relay trip. * Check the emergency stop switch fuses, wiring from - T2 to powerboard and fuse if there's no supply to - T2 or no 24VAC supply to the powerboard. * If there's no +12V output from the powerboard, consider replacing the powerboard or reducing excessive load on the board.
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