Our generator is a different model but I believe the fault codes are very similar for all their models. I found the following. It indicates you should be able to get a second-level fault code which would more precisely define the generator's issue.
"• Three blinks indicate a service fault. Press Stop once to cause the two-digit, second-level fault code to blink. (Pressing Stop again will stop the blinking.)The two-digit code consists of 1, 2, 3, 4 or 5 blinks, a brief pause, and then 1 to 9 blinks. The first set of blinks represents the tens digit and the second set of blinks represent the units digit of the fault code number. For example, Fault Code No. 36 appears as: blink-blink-blink—pause—blink-blink-blink-blink-blink-blink— long pause—repeat"