--- title: "Randell uHi: the line voltage is too high" description: "What uHi means on Randell uHi: the line voltage is too highs, what to check before booking, and when it is not a failure at all." url: "https://commercialappliancerepair.center/error-codes/randell-uhi/" --- # Randell uHi: the line voltage is too high High line voltage heats motors and the compressor and can damage electronics. ## What uHi actually means. High line voltage heats motors and the compressor and can damage electronics. Randell's table sends uHi to a voltage check by a qualified technician. Condensing units are built for about 10 percent either side of the voltage on the data tag. Randell commercial appliance display What to do when uHi 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 uHi on its commercial appliances. Follow it to the end: the last card says whether this is a visit. 01 Write down when uHi appears and what else was running. 02 Have an electrician measure the outlet voltage. 03 Book a visit if uHi remains once the supply reads normal. ### 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 uHi is not a temperature alarm. It is the opposite of uLi and points at the building supply first. ## What you may notice with it. The commercial appliance problem uHi 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 uHi 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/) [uLi](https://commercialappliancerepair.center/error-codes/randell-uli/) [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 High [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 uHi 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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Write down when uHi appears and what else was running. If it comes back, it needs a visit. ### What causes uHi on a Randell? A supply problem such as a loose neutral or a wrong connection in the building. The outlet is measured before the unit is blamed. ### Is uHi on a Randell covered by the maker's paperwork? Randell's manual warns that damage from voltage outside the limits voids its coverage, so fix the supply quickly. ### Where is the Randell data tag? Randell points to the data tag on the compressor for the correct electrical requirements. --- **[Read on the site: Randell uHi: the line voltage is too high](https://commercialappliancerepair.center/error-codes/randell-uhi/)** **[Book a visit with CommercialApplianceRepair.center](https://commercialappliancerepair.center/schedule/)**