Please try this to get the information on the Power supply 1 and 2.
McAfee-ELM-4600 ~ # ipmitool sdr type 'Power Supply'
PS1 Status | 50h | ok | 10.1 | Presence detected, Power Supply AC lost
PS2 Status | 51h | ok | 10.2 | Presence detected
PSU1 Status | 66h | ns | 10.1 | No Reading
PSU2 Status | 67h | ns | 10.2 | No Reading
Also you will see a red flag on the device and which in turns shows a log in device logs as there was an issue with the power supply.