DC rules On Tue, Jun 23, 2020, 04:33 Paul Gilmartin < [email protected]> wrote:
> On Mon, 22 Jun 2020 16:30:01 +0000, Doug wrote: > > >Yes its true, but before you let a disk spin backwards, you checked the > >fans in the logic gate, they were 3 ph too. Depending on how they spun > >(clockwise or counterclockwise), you had the phases corrected. I never > >spun up a drive that went backward using that technique. > >And if it was say a 2365, or a 2860 or 70, it would power up just fine, > >then get a thermal since the fans were spinning in the wrong direction. > > > There are circuit diagrams of various phase testers on the WWW, But > I'd think the ideal is a vane on a microswitch. That verifies: > o Correct phasing. > o Fan operation. > o Unimpeded intake duct. > > -- gil > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
