found Gas Fryer unit off, first unit on left serial number 48182811B customer advised that unit will work for few hours then read oil level low - cycled unit on, unit went thru nelted cycled and came up to set point no errors shut unit down and switch control to center vat to see if problem follows control or stays with fryer - called Vulcan, got voice mail, left message and cell number, waited 1/2 hour for return call, Mark called back and had me check drain switch error came up fill vat draining - adjusted switch and used wire ties on modules pin connectors to tighten assembly - unit may need s drain switch if problems comes back.