Philips AD-0162-T8 Tweeter 2422 257 33312 157746340975 but it shows error E31

but it shows error E31 on startup

Manufacturer Invitrogen Model Number XCell SureLock SKU 19-63467 Ref 23-103366

1x: A18-TEST

The Dual Digital Readout has wear from previous use including scuffs and scratches

Philips AD-0162-T8 Tweeter 2422 257 33312 157746340975 but it shows error E31Condition Used Description This item is fully tested and in excellent working order. Item will come with a 30 Day Warranty. Cosmetically in good condition showing minor scuffs scratches blemishes from previous use. Includes Tweeter as pictured. No additional items or accessories are included. Unless pictured, no power adapter power cable included. Photos are of the actual unit for sale. Inventory is on hand and ready to ship. Please feel free to