Randell uHi: the line voltage is too high
High line voltage heats motors and the compressor and can damage electronics.
Mon–Sat, 8am–8pm
- Controls and power
- Commercial controls and board repair
- Source: Randell
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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 applianceKind 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 uHi on its commercial appliances. Follow it to the end: the last card says whether this is a visit.
Write down when uHi appears and what else was running.
Have an electrician measure the outlet voltage.
Book a visit if uHi remains once the supply reads normal.
Still there?
It usually turns into 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
Where uHi usually leads
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 repairMore Randell codes
Controls and power on other makes
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.
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
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.
All service areasTampa BayFL · 31 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
Questions
about uHi.
Can I clear uHi myself?
What causes uHi on a Randell?
Is uHi on a Randell covered by the maker's paperwork?
Where is the Randell data tag?
Back to your everyday
Still showing uHi?
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.