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A gray electrical disconnect box on a tiled commercial kitchen wall beside a stainless convection oven, the oven's heavy power cord running up to it, the disconnect handle set to off, nobody near it.

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.

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Mon–Sat, 8am–8pm

  • Controls and power
  • Commercial controls and board repair
  • Source: Randell

Book a visit

Three short steps, about a minute.

or call (844) 571-4566

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 codeControls 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 toCommercial controls and board repair

Controllers, touch panels, relays, contactors and interlocks tested, and replaced only when the evidence says so.

Shows up asCommercial 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.

MakeRandell

Randell prep stations that lose temperature over the afternoon are usually visited just before the dinner setup, when the rail can be cleared.

SourceRandell 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. 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

Before you call

Commercial Appliance Error Code on a Combi, Fryer, Dish Machine or Laundry Display

All 8 causes, cheapest first

It also comes with

Close view of the dark touch control panel on the front of a stainless combi oven in a commercial kitchen, one abstract amber warning indicator glowing among unlit icons, the steam-fogged glass door blurred beside it. 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

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

More Randell codes

HiLoCONLEAuHiE01dor

Controls and power on other makes

Alto-Shaam E02Beverage-Air uLiBlodgett Com ErrorDelfield uLiDexter F1Frymaster E19Garland E01Hatco Communication Error
All 64 codes of this kind
A row of three stainless steel reach-in cabinets with solid doors along the wall of a working restaurant kitchen, the reach-ins clearly the subject, one door open showing sheet pans of prepped vegetables on wire shelves, a walk-in cooler door with a clear strip curtain visible at the far end, a cook seen only from behind in a white jacket passing in the soft background, bright even kitchen light. 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.

 A working restaurant cooking line under a stainless ventilation hood, two stainless gas fryers with baskets hanging above the oil, a flat griddle and a combi oven with a glass door beside them, the equipment clearly the subject, a cook seen only from behind and shoulders down at the far end of the line, warm kitchen light, small blue flames visible under the griddle. 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) Randell 9200-290 sidemount series operator manual, PP MNL2501 rev. B (12/25)

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.

All service areas

Tampa BayFL · 31 areas

OrlandoFL · 30 areas

Miami / South FloridaFL · 47 areas

New York MetroNY · 75 areas

HoustonTX · 36 areas

ChicagoIL · 50 areas

Los AngelesCA · 95 areas

San DiegoCA · 31 areas

San Francisco Bay AreaCA · 74 areas

A restaurant team working a busy commercial kitchen line.
For the heart of your home.

Questions
about uLi.

Can I clear uLi myself?
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.

Back to your everyday

Still showing uLi?

A booking with a code goes further when it has the code as shown, the model and serial from the data plate, and a word on whether the unit still holds temperature, heats, rinses or spins. With those three, the office can match the likely part to your unit the same day.

Schedule a repair Call (844) 571-4566
(844) 571-4566 Schedule a repair