I have the same motherboard and initially had the same problem after building my rig.
I believe the 1 long beep 4 short beeps is CPU fan warning. I installed an aftermarket CPU cooler with low RPM fan and was presented with the beeps, then the system shut down.
To fix it I plugged in the boxed Intel CPU fan to the motherboard (just placed the fan on the table and plugged in the connector), then went to BIOS (advanced mode) and set the CPU fan speed alarm to "Ignore". Then just reconnected the installed aftermarket back to the motherboard and all was well.