3Com Switching LED error

Hi everyone recently i have testing 1 unit 3cOM 4924 switch and i let it running for several days,at the fourth day i shutdown the switch for a about a 3 hours the switch hang and the error is unit 1 & 3 flashing orange colour after i plug in power for a several time the same problem still happen,for information the switch was not be configure,can someone explain me about the problem