Only firmwareb below can solve fan noise issue
4. When SPF 5000ES Has Loud Fan Noise, You Can Try To Upgrade Firmware Below:
Please note that these firmwares below ONLY can be ugraded via newest control board that starts with 67.** Please don’t upgrade them via old control board with 40.**
F2809_SK067.F4_20221027_A
V103_SK068.F4_20221027_A.bin