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Merlin Legend power supply fan failing

Merlin Legend power supply fan failing

Merlin Legend power supply fan failing

Hello. We have a Merlin Legend system with two power supplies. The "center" one has a fan that started to whirr and grind this morning, the classic bearing failure noise. My research indicates that swapping out the module is the way to go.

I am wondering if there is a way to tell what power supply we have by the front panel. I think it's a C1 but I'm not 100 percent sure.

I'd also like to know if these power supplies are hot-swappable...in other words, if I shut down the bad one will the other keep the system online while I swap them out?

I've attached a pic of both modules (the failing one is on the right).

Thanks for any assistance,


RE: Merlin Legend power supply fan failing

There are no fans in Merlin Legend power supplies, so that's not what you're hearing!

NO, they are not hot swappable. Power the entire system (from left to right), change out your power supply, then power up from Right to Left

Somewhere there was a reference to identifying the power supply from the location and orientation of the power switch, but you would be better served by grabbing the Legend Pocket Reference and looking at the section on "Power Supply Unit Load Requirements" beginning on page 90 (realize that the actual physical booklet is spiral bound, and information on odd numbered pages is an extension of information on even numbered pages, so info on page 91 meshes with 90).

Or just get a 391C1 power supply and be done with it.

RE: Merlin Legend power supply fan failing

Tommy, thanks for the excellent reply. Since you indicate there is no fan in these power supplies, I just had a closer look, and I believe the grinding noise is not coming from the power supply after all but from the 007 MLM module right next to it. In fact, if I cut power from the far left power supply, the grinding noise stops.

Does the 007 MLM have a fan? What mechanical device could be in there causing it to suddenly start making a grinding noise? Is there a mechanical hard drive in there?

Thanks again,


RE: Merlin Legend power supply fan failing

What you are hearing is your Voice mails Hard drive. It's beginning to fail. You need to backup your Voice mail for the enevitable.

RE: Merlin Legend power supply fan failing

WikiTech thanks for the reply.

Is there any way to physically back up the data on that drive and restore it to a new module? I've searched the forums and there is some indication that there is not and that we should copy down all of our announcements etc.

Thanks again


RE: Merlin Legend power supply fan failing

The only way to backup a 007 MLM is to clone the hard drive. Otherwise you'll need to make note of your current greetings and announcements. Replacement hard drives and flash drives are still available. You might also consider replacing the 007 MLM with a Merlin Messaging as they can be had fairly cheaply these days.

Brian Cox
Georgia Telephone

RE: Merlin Legend power supply fan failing

Just wanted to say thanks to everyone who responded...as usual, super helpful responses and a great forum to be part of. We had a unit overnighted and our local programmer made time to come in and configure it. It's working fine, no more grinding noises indicating imminent failure!

RE: Merlin Legend power supply fan failing

There is a way, although not an easy way, to replace the old Electro-Mechanical drive with an SSD. Just for future reference. I have not yet done it on my Merlin Messaging, but there's so little traffic, it's hardly worth the effort at this point.


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