Hoshizaki ULo: supply voltage too low for the prep table
The same voltage watch that raises UHi also catches a weak supply.
Mon–Sat, 8am–8pm
- Controls and power
- Commercial controls and board repair
- Source: Hoshizaki
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What ULo
actually means.
The same voltage watch that raises UHi also catches a weak supply. At roughly 96 volts or less the display shows ULo and the compressor is de-energized until the voltage recovers, when the safety resets itself.
Hoshizaki commercial appliance display
What to do when ULo 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.
MakeHoshizaki
On a Hoshizaki cold cabinet in a restaurant, the tech first finds out when the last good temperature was written on the log.
SourceHoshizaki Steelheart prep table with raised rail and refrigerated equipment stand service manual (archived copy of the Hoshizaki America PDF)
Steelheart prep tables with raised rail and refrigerated equipment stands.
Before you book,
in this order.
Each step comes from Hoshizaki's own guidance for ULo on its commercial appliances. Follow it to the end: the last card says whether this is a visit.
Trace the prep table's cord and make sure it reaches a wall outlet directly, with no power strip or extension in between.
Note whether ULo appears when a nearby oven, mixer or dish machine starts.
Keep the lids closed and check rail pans with a thermometer while the compressor is off.
Have the circuit measured, and book a visit if ULo shows while the voltage is normal.
Still there?
It usually turns into commercial controls and board repair. Book with the code and the model number.
What not to do
ULo is not a failed compressor, even though the compressor stops. It is also unrelated to Lo, which means the cabinet is too cold.
What you may
notice with it.
The commercial appliance problems ULo tends to arrive with. Answer these at the commercial appliance before anyone is booked.
All problems
Where ULo usually leads
Commercial controls and board repair.
Hoshizaki
commercial appliances.
On a Hoshizaki cold cabinet in a restaurant, the tech first finds out when the last good temperature was written on the log.
Hoshizaki commercial appliance repairMore Hoshizaki codes
Controls and power on other makes
In Hoshizaki's own words
Low-Voltage Alarm (96VAC±5% or less)
Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Steelheart prep tables with raised rail and refrigerated equipment stands.
Hoshizaki ULo 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 ULo.
Can I clear ULo myself?
Can an extension cord cause ULo on a Hoshizaki prep table?
Will ULo damage the Hoshizaki compressor?
Why does ULo show whenever the dish machine runs?
Back to your everyday
Still showing ULo?
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.