UniMac E ro: the rotation sensor signal is invalid
When the rotation sensor signal goes bad, a UniMac does not stop mid-load.
Mon–Sat, 8am–8pm
- Sensors and probes
- Commercial controls and board repair
- Source: UniMac
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What E ro
actually means.
When the rotation sensor signal goes bad, a UniMac does not stop mid-load. It switches to fixed coast times to finish the cycle safely, then shows E ro so the owner knows the sensor needs attention.
UniMac commercial appliance display · also shown as E rO
What to do when E ro shows on the commercial applianceKind of codeSensors and probes
A probe is handing the controller a reading it cannot trust, or none at all: a box or coil sensor torn loose from its clip, a fryer probe coated in carbon from oil left too long between filterings, a combi core probe with a kinked cable, or a connector gone green from steam and cleaning chemicals. The unit then runs on, stops, or shuts the heat or the cooling off to protect itself. Letting it cool and restarting it as the manual describes is fair; a probe that still reads wrong sits behind a panel, 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.
MakeUniMac
UniMac equipment in a facility laundry room is usually serviced after the heaviest morning loads are out.
SourceUniMac UW-series washer-extractor control manual F8552201R2 (Alliance Laundry Systems, 2017)
UniMac UW-series hardmount extractors of 45 to 130 lb (UWH, UWL, UWN and UWU models) with the keypad control in manual F8552201. Current UW models sold with UniLinc Touch show plain-word messages instead of these codes.
Before you book,
in this order.
Each step comes from UniMac's own guidance for E ro on its commercial appliances. Follow it to the end: the last card says whether this is a visit.
Let the cycle finish on its own coast timing.
Wait until the cylinder has fully stopped before opening the door.
Book a visit to check the rotation sensor and its connections.
Still there?
It usually turns into commercial controls and board repair. Book with the code and the model number.
What not to do
E ro does not mean the motor failed; the cylinder still turns. It also differs from the Ed codes, which come from the motor drive itself.
What you may
notice with it.
The commercial appliance problem E ro tends to arrive with. Answer these at the commercial appliance before anyone is booked.
All problems
Where E ro usually leads
Commercial controls and board repair.
UniMac
commercial appliances.
UniMac equipment in a facility laundry room is usually serviced after the heaviest morning loads are out.
UniMac commercial appliance repairMore UniMac codes
All 15 UniMac codesSensors and probes on other makes
In UniMac's own words
Invalid signal received from Rotation Sensor. Control will activate coast times to complete cycle.
Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. UniMac UW-series hardmount extractors of 45 to 130 lb (UWH, UWL, UWN and UWU models) with the keypad control in manual F8552201. Current UW models sold with UniLinc Touch show plain-word messages instead of these codes.
UniMac E ro 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 E ro.
Can I clear E ro myself?
Can I keep using a UniMac that shows E ro?
Does E ro stop the cycle on a UniMac?
Is E ro a sensor or a board problem on a UniMac?
Back to your everyday
Still showing E ro?
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.