On a few of our Cisco 3750X Catalyst switches Solarwinds is reporting power supplies not functioning:

However, logging into the switch my power supplies are all functioning normally. I've tried removing and re-adding the node in NPM, disabling and re-enabling the sensor, but I still cannot clear this alarm.
swtich#show env power all
SW PID Serial# Status Sys Pwr PoE Pwr Watts
--- ------------------ ---------- --------------- ------- ------- -----
1A C3KX-PWR-715WAC LIT15460YQ4 OK Good Good 715/0
1B C3KX-PWR-715WAC LIT15441C3C OK Good Good 715/0
2A C3KX-PWR-715WAC LIT15441A61 OK Good Good 715/0
Any ideas would be great. Thank you