Fan buzz progressive dynamics 4645-
I've installed two of these converters (orig and replacement). Both exhibit buzzing variable speed fans. 1. Nothing wrong with the fans themselves-when they operate, they're quiet. 2. Occurs wh...
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I'm answering my own question for future reference. Wrote to PD and got most helpful answer.
Evidently I'm operating it at a range where the fans are barely on and barely off. Fan completely off doesn't hum or fan completely on doesn't hum. Just a narrow intermediate range before fan actually starts turning.
PD is sending me a fan with a capacitor attached. 220uf @ 25 volt. The fans are in parallel-only one capacitor needed.
Very pleased with the support from PD.
Evidently I'm operating it at a range where the fans are barely on and barely off. Fan completely off doesn't hum or fan completely on doesn't hum. Just a narrow intermediate range before fan actually starts turning.
PD is sending me a fan with a capacitor attached. 220uf @ 25 volt. The fans are in parallel-only one capacitor needed.
Very pleased with the support from PD.
