--- title: "Beverage-Air uLi: the line voltage is too low" description: "What uLi means on Beverage-Air uLi: the line voltage is too lows, what to check before booking, and when it is not a failure at all." url: "https://commercialappliancerepair.center/error-codes/beverage-air-uli/" --- # Beverage-Air uLi: the line voltage is too low The Cross Temp control watches the supply voltage and blinks a low voltage alarm when it drops below its limit; the alarm table prints the blinking text as ulo. ## What uLi actually means. The Cross Temp control watches the supply voltage and blinks a low voltage alarm when it drops below its limit; the alarm table prints the blinking text as ulo. Low voltage makes the compressor struggle and run hot. The fix is nearly always on the building side. Beverage-Air commercial appliance display · also shown as uLo What to do when uLi shows on the commercial appliance ### Kind of code Controls and power The controller itself is reporting trouble, or the supply behind it is: a display with dead segments, a keypad that stopped responding after steam or degreaser got behind it, relays that stick, stored recipes or cycles that vanished overnight, a blown control fuse, or one leg of a three-phase feed missing so half the heat or the pump is gone. A full power cycle at the breaker, done as the manual describes, clears a passing glitch; a code that returns, a scorched smell or any sign of moisture behind the panel means the breaker stays off, and that is a visit. ### Usually leads to Commercial controls and board repair Controllers, touch panels, relays, contactors and interlocks tested, and replaced only when the evidence says so. ### Shows up as Commercial Appliance Error Code on a Combi, Fryer, Dish Machine or Laundry Display A commercial appliance error code appears as letters or numbers on a combi, fryer, reach-in controller, dish machine or laundry machine display, or as a flashing light or an alarm tone. ### Make Beverage-Air When a Beverage-Air cabinet drifts warm mid-shift, the first minutes of the visit go to where the food went and what the temperature log recorded. ### Source Beverage-Air Cross Temp (CT) freezer/refrigerator user manual, 809-154A (rev. 02/26) Listed in the electronic controller alarms table of Beverage-Air's Cross Temp (CT) manual (rev. 02/26). ## Before you book, in this order. Each step comes from Beverage-Air's own guidance for uLi on its commercial appliances. Follow it to the end: the last card says whether this is a visit. 01 Plug the unit straight into its own outlet, with no extension cord. 02 Note whether other equipment on the circuit starts when the alarm appears. 03 Have an electrician check the circuit, then book a visit if the alarm returns on good voltage. ### Still there? It usually turns into [commercial controls and board repair](https://commercialappliancerepair.center/services/commercial-controls-and-board-repair/). Book with the code and the model number. ### What not to do uLi is not a failed control; it is always active on the Cross Temp and reflects the supply. The high voltage alarm, uHi, has the same first checks. ## What you may notice with it. The commercial appliance problem uLi tends to arrive with. Answer these at the commercial appliance before anyone is booked. [All problems](https://commercialappliancerepair.center/problems/) Before you call ### [Commercial Appliance Error Code on a Combi, Fryer, Dish Machine or Laundry Display](https://commercialappliancerepair.center/problems/commercial-error-code/) [All 8 causes, cheapest first](https://commercialappliancerepair.center/problems/commercial-error-code/) Problem ### Commercial Appliance Error Code on a Combi, Fryer, Dish Machine or Laundry Display 8 causes, cheapest first Where uLi usually leads ## Commercial controls and board repair. **Controller, touch panel, probe or sensor, relay, contactor, power supply, door switch or interlock, tested before anything is changed · moderate.** Book a visit [What the job involves](https://commercialappliancerepair.center/services/commercial-controls-and-board-repair/) ## Beverage-Air commercial appliances. When a Beverage-Air cabinet drifts warm mid-shift, the first minutes of the visit go to where the food went and what the temperature log recorded. [Beverage-Air commercial appliance repair](https://commercialappliancerepair.center/brands/beverage-air/) More Beverage-Air codes [dEF](https://commercialappliancerepair.center/error-codes/beverage-air-def/) [Hi](https://commercialappliancerepair.center/error-codes/beverage-air-hi/) [Lo](https://commercialappliancerepair.center/error-codes/beverage-air-lo/) [dOr](https://commercialappliancerepair.center/error-codes/beverage-air-dor/) [LEA](https://commercialappliancerepair.center/error-codes/beverage-air-lea/) [Con](https://commercialappliancerepair.center/error-codes/beverage-air-con/) [uHi](https://commercialappliancerepair.center/error-codes/beverage-air-uhi/) [E01](https://commercialappliancerepair.center/error-codes/beverage-air-e01/) Controls and power on other makes [Alto-Shaam E02](https://commercialappliancerepair.center/error-codes/alto-shaam-e02/) [Blodgett Com Error](https://commercialappliancerepair.center/error-codes/blodgett-com-error/) [Delfield uLi](https://commercialappliancerepair.center/error-codes/delfield-uli/) [Dexter F1](https://commercialappliancerepair.center/error-codes/dexter-f1/) [Frymaster E19](https://commercialappliancerepair.center/error-codes/frymaster-e19/) [Garland E01](https://commercialappliancerepair.center/error-codes/garland-e01/) [Hatco Communication Error](https://commercialappliancerepair.center/error-codes/hatco-communication-error/) [Henny Penny E-4](https://commercialappliancerepair.center/error-codes/henny-penny-e-4/) [All 64 codes of this kind](https://commercialappliancerepair.center/error-codes/#family-board) Beverage-Air builds this ### Commercial cold storage Reach-in and pass-through cabinets, walk-in coolers and walk-in freezers, prep and sandwich tables, undercounter units and blast chillers that hold a kitchen's food at safe temperatures. ## In Beverage-Air's own words > beep the Low voltage alarm [Beverage-Air Cross Temp (CT) freezer/refrigerator user manual, 809-154A (rev. 02/26)](https://store-2tiw84ejdt.mybigcommerce.com/content/manuals/809-154A_MANUAL_INSTALLATION_AND_OPERATION_BEV_AIR_CT.pdf) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Listed in the electronic controller alarms table of Beverage-Air's Cross Temp (CT) manual (rev. 02/26). ## Beverage-Air uLi commercial appliance repair, where we come out. The same visit in every metro below: the code, the model number, and a diagnosis before any part is ordered. 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Plug the unit straight into its own outlet, with no extension cord. If it comes back, it needs a visit. ### Why does my Beverage-Air show a low voltage alarm at lunch? Heavy equipment starting on the same supply can drag the voltage down. A dedicated circuit is the usual fix. ### Can low voltage damage my Beverage-Air? Repeated starts on low voltage stress the compressor, which is why the control warns you. ### Why does the Beverage-Air manual show ulo and uLi? The alarm table names the code uLi and shows the blinking text as ulo. Both are the same low voltage alarm. --- **[Read on the site: Beverage-Air uLi: the line voltage is too low](https://commercialappliancerepair.center/error-codes/beverage-air-uli/)** **[Book a visit with CommercialApplianceRepair.center](https://commercialappliancerepair.center/schedule/)**