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“
chattering QEL Crashbar
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RELATED FAQS
Question
Answer
What does chattering mean on a QEL?
Resolution:
If a vertical rod device, verify the vertical rods are adjusted properly and there is not a bind at the strikes. Make sure the push bar is not binding at the pushbar guides or any...:
Why is the Von Duprin PS873 power supply buzzing or chattering?
Resolution:
Some transformers in the power supplies provide a little humming noise and that is normal. If the humming in Von Duprin PS873 power supply is loud follow these steps. Remove the load from the outp...: