When you type this Oracle ILOM command:
-> show /System/Cooling
the output under Properties includes the following lines:
installed_power_supply_fans = Not Supported max_power_supply_fans = Not Supported
Workaround: To display accurate information about installed power supply fans, type this Oracle ILOM command, which includes the /SYS target:
-> show /SYS -l all type=='Fan' value