Pulsar M 3000 AQ333fooT.SW AL defout interne tension min N 707

inverter fault power board must be replaced

alarm 707 pulsar

http://rep.mgeups.com/edg/edg/manuals/5users.pdf

You could try puchasing a replacement bobbin case, its possible that the tension spring on it has worn/stretched a bit. Try this website if you are in the USA - http://www.sewingpartsonline.com/bernina-707-sewing-machine-parts.aspx or just go to the bernina website and choose your country to find the head office in your country. They should be able to sell you the part or direct you to a local dealer closer to you.

Also clean out the top tension device if you haven't already. Turn to zero and floss between the discs. I use a clean selvage edge of a waste piece of cotton fabric or you could use dental floss or ribbon too, just something to get in there and remove any buildup. Thread, especailly darker colours, will shed dye particles and fibres and over time this can build up in the tension discs impairing their function.

Otherwise, sounds like you've had a really great run with your Bernina - if you don't already do this, then consider taking it for a service every two years too as the internals benefit from a lube on the older mechanical machines. It may be that the top tension device needs replacing to resolve your issue.

Red beeping triangle is a major alarm. It is most likely an internal fault. The inverter section are often the main reason. A technician has to look at the internal problem.

Some economics UPS have a functin called "Green Function". A timer disconnect the load after 5 min to prevent damages on internal circuit.
You can confirm this:

- battery remain to good level charge
- UPS restart for other 5 min if you press On button

See manual if you can disable this features.

MGE Pulsar 3000 is an online UPS. try to check the battery first if its ok. coz for an online UPS it will need to have a good working UPS battery to trigger the switching relays to on the online UPS unlike backups UPS that can be turn on without any batteries

sounds like when you say cold you mean very cold. If your choke has variable control on it try using more choke until the motor gets warm. Often times the cold weather causes a leaner condition because the air ppm is so much greater leaving you with a leaner running condition.

sounds like a slightly damaged power supply. try powering up with an equivalent supply. if only an ac wall cord is plugged in for power, then internal supply is at fault