Pool pump shutting off/tripping the circuit breaker

That unit has a GFCI breaker installed. Those are made to prevent electrocution. IF there is ANY water leakage from the pump into the area that supplies voltage, the breaker will trip. Make sure that there are no damp areas inside the unit and make sure that you have all the wires that it connects to wired correctly and have ground connections.

Most likely you are not. The manual is very conservative!!! I have a 14000 gallon pool and I run my intex salt system during the summer at 10 to 12 hrs pump and 8 to 10 hrs chlorination in between those 12 hrs and my pool stays very clear. But..... If you don't clean the unit and let it alarm for low flow, low salt or not run the unit log enough, you WILL HAVE GREEN WATER!!!
Hope this helps, If it does, please rate the tip!

They are so cheap, just buy a new one. Intex filters and pumps are essentially "disposable" products, and typically dont last more than 2 years

You can use a wet dry vac. Remove the filter cover first.

Well this may be a stupid thought but make sure the outlet works other items. Never know maybe the breaker tripped.
If it is actually the pump itself, intex will replace it for free for the first 2 years.
you need a valid receipt then call them they will e-mail a claim sheet fill it out and fax it back they will have a new pump to your door within days

Here is a link to Intex website for the manuals and videos. Intex Pool

These should help
A video of some one installing
http://www.youtube.com/watch?v=DvAFYb9S75Y
Their FAQ section on Metal pools
http://www.intexstore.com/FAQMetalFramePool.aspx

Sorry i couldn't source the extact instructions.

Here is a pretty good you-tube video for the general pool setup for above ground metal frame pools. The first minute is fluff but the rest covers the basics.

I don't have an instruction manual for this particular pool, but I do have general installaton instructions for above ground pools with metal frames and liners. The pool liners are the same to install no matter what type of pool you have, so this should help!

Assuming you have the Intex salt water system and the easy set pool, here's what the manual says:

15x33" - 65 pounds (80 for metal frame)
15x36 - 65 pounds (100 for metal frame)
15x42 - 80 pounds (110 for metal frame)
15x48 - 95 pounds (N/A for metal frame)

hope this helps!