onnan 5500 generator

had the new rig out Raptor 415TS with the onnan 5500 running for about 2 hours watching tv and such turned the air on and about 30 minutes later the generator turned its self off it started right back up but the light blinked 3 times real fast which said service needed. my question is there something to look at real quick before I make a appointment to have it looked at