--- title: "Randell uLi: the line voltage is too low" description: "What uLi means on Randell 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/randell-uli/" --- # Randell uLi: the line voltage is too low Randell's 9200 manual says the Danfoss control has low voltage protection and will not send power to the compressor below 104 volts. ## What uLi actually means. Randell's 9200 manual says the Danfoss control has low voltage protection and will not send power to the compressor below 104 volts. uLi is the display that goes with it. Randell asks for each unit on its own dedicated line and a voltage reading at the compressor while it runs. Randell commercial appliance display 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 Randell Randell prep stations that lose temperature over the afternoon are usually visited just before the dinner setup, when the rail can be cleared. ### Source Randell 9200-290 sidemount series operator manual, PP MNL2501 rev. B (12/25) Listed in the Danfoss controller codes table of Randell's 9200-290 sidemount operator manual (rev. B, 12/25). ## Before you book, in this order. Each step comes from Randell'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 directly into its own dedicated outlet, with no extension cord or power strip. 02 Note whether other equipment on the circuit was starting when uLi appeared. 03 Have the circuit checked by an electrician, then book a visit if uLi 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 protection working as intended, not a broken control. Randell's action for it is a voltage check by a qualified technician. ## What you may notice with it. The commercial appliance problems 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/) It also comes with - [**Reach-In Cooler Not Holding Temperature Through a Shift**](https://commercialappliancerepair.center/problems/reach-in-not-holding-temperature/) 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/) ## Randell commercial appliances. Randell prep stations that lose temperature over the afternoon are usually visited just before the dinner setup, when the rail can be cleared. [Randell commercial appliance repair](https://commercialappliancerepair.center/brands/randell/) More Randell codes [Hi](https://commercialappliancerepair.center/error-codes/randell-hi/) [Lo](https://commercialappliancerepair.center/error-codes/randell-lo/) [CON](https://commercialappliancerepair.center/error-codes/randell-con/) [LEA](https://commercialappliancerepair.center/error-codes/randell-lea/) [uHi](https://commercialappliancerepair.center/error-codes/randell-uhi/) [E01](https://commercialappliancerepair.center/error-codes/randell-e01/) [dor](https://commercialappliancerepair.center/error-codes/randell-dor/) Controls and power on other makes [Alto-Shaam E02](https://commercialappliancerepair.center/error-codes/alto-shaam-e02/) [Beverage-Air uLi](https://commercialappliancerepair.center/error-codes/beverage-air-uli/) [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/) [All 64 codes of this kind](https://commercialappliancerepair.center/error-codes/#family-board) Randell 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. Randell builds this ### Commercial cooking equipment Fryers, griddles, charbroilers, restaurant ranges, convection and combi ovens, steamers, kettles, holding cabinets and toasters, on gas or electric, that make up the hot side of a kitchen line. ## In Randell's own words > Line Voltage Too Low [Randell 9200-290 sidemount series operator manual, PP MNL2501 rev. B (12/25)](https://www.randell.com/sites/randell/files/literature/Randell/Refrigerators%20%26%20Freezers/Worktops/Manuals/MNL2501-9200-290-Sidemount-Refrigerators-Manual.pdf) [Randell 9200-290 sidemount series operator manual, PP MNL2501 rev. B (12/25)](https://www.randell.com/sites/randell/files/literature/Randell/Refrigerators%20%26%20Freezers/Worktops/Manuals/MNL2501-9200-290-Sidemount-Refrigerators-Manual.pdf) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Listed in the Danfoss controller codes table of Randell's 9200-290 sidemount operator manual (rev. B, 12/25). ## Randell 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 directly into its own dedicated outlet, with no extension cord or power strip. If it comes back, it needs a visit. ### Why did my Randell stop cooling and show uLi? The control holds the compressor off when voltage drops below 104 volts, to protect it. Fix the supply and it resumes. ### Does a Randell need its own circuit? Yes. Randell's manual says it is important that the unit has its own dedicated line. ### Can low voltage damage a Randell compressor? Randell warns that voltage outside plus or minus 10 percent of the data tag can burn out a condensing unit. --- **[Read on the site: Randell uLi: the line voltage is too low](https://commercialappliancerepair.center/error-codes/randell-uli/)** **[Book a visit with CommercialApplianceRepair.center](https://commercialappliancerepair.center/schedule/)**