Allegion
Terms of Use
Privacy Policy
Frequently Asked Questions
Ask your question
Entering your question as a complete sentence will provide more accurate results than keywords or phrases.
User questions
FAQs
Category List
“
QEL is chattering
”
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...: