- Appliances
- Blood pressure monitors
Er
Omron Er on blood pressure monitor: device malfunction message
Risk level
Low
Usually safe to check without specialist tools.
Urgency
Low
Quick answer
“Er” on an Omron blood pressure monitor means, per its manual, that the monitor has malfunctioned. Press START/STOP again; if “Er” keeps showing, the manual sends you to your OMRON retail outlet or distributor. Never open the monitor or try to repair it.
Safety first
Stop and check this first
- If anything worries you about your health, talk to your doctor: an “Er” on the monitor is not a medical opinion and says nothing about how you are.
- Never open the monitor or attempt your own repair: the OMRON manual advises against it and warns that unapproved modifications void the warranty.
Safe checks you can perform
- Press START/STOP again away from other devices
- Reset by taking all batteries out for 30 seconds
- Gather purchase details without opening the monitor
Leave these tasks to a qualified professional
- Do not attempt this professional task: Consultation at the OMRON retail outlet or distributor
- Do not attempt this professional task: Handling the 5 year warranty claim
- Do not attempt this professional task: Regular check of the monitor every two years
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Consultation at the OMRON retail outlet or distributor
What they doIf “Er” still appears after pressing START/STOP again, the manual directs the user to the OMRON retail outlet or distributor to assess the monitor.
They must show youthe “Er” message on the display and the earlier steps you already tried.
In writingthe model, the reason for the visit and what is agreed to do with the monitor.
Handling the 5 year warranty claim
What they doIf the purchase is within the period, the retailer or an authorised OMRON distributor handles the warranty with the complete product and the original invoice or receipt.
They must show youwhat the warranty covers and what it excludes, for example the cuff and cuff tube, which carry one year.
In writingwhether the claim is accepted and any cost that may be charged if it is not.
Regular check of the monitor every two years
What they doOMRON generally recommends having the monitor inspected every two years and points to an authorised dealer or its customer service for this.
They must show youwhere the inspection is carried out and who performs it.
In writingthe date of the inspection and what was checked on the monitor.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Press START/STOP again away from other devices
- Who:
- you, holding the monitor and touching nothing else.
- How:
- press the START/STOP button once more, as the “Er” row says, and move any other electrical device so it sits more than 30 cm from the monitor while it measures.
- Result that matters:
- the measurement starting and finishing without “Er” coming back on the display.
- If “Er” does not return:
- write down the date and which device was nearby, in case it reappears.
- If “Er” keeps appearing:
- go on to the battery reset in the next step.
- Evidence to keep:
- a photo of the display showing “Er” and a note of what was next to the monitor.
Evidence: OMRON M3 Comfort AFib (HEM-7196-FLE) Automatic Upper Arm Blood Pressure Monitor Instruction Manual 1 (EN) · OMRON RS4 (HEM-6181-E) Automatic Wrist Blood Pressure Monitor Instruction Manual 1 (EN)
Reset by taking all batteries out for 30 seconds
- Who:
- you, with the monitor switched off.
- How:
- remove all batteries, wait 30 seconds and refit them with the polarity properly aligned, following instruction manual 2 for your model. Then press START/STOP and measure calmly.
- Result that matters:
- the monitor switching on and completing a measurement without showing “Er”.
- If it works normally:
- note that this reset was enough so you know what to do next time.
- If “Er” appears again after the reset:
- the manual points you to your OMRON retail outlet or distributor.
- Evidence to keep:
- the time of the reset and whether “Er” came back on the first measurement.
Evidence: OMRON M2 Basic (HEM-7121J-E) / X2 Basic (HEM-7121J-EO) Automatic Upper Arm Blood Pressure Monitor Instruction Manual 1 (EN) · OMRON M3 Comfort AFib (HEM-7196-FLE) Automatic Upper Arm Blood Pressure Monitor Instruction Manual 1 (EN) · OMRON M6 Comfort AFib (HEM-7380-E) Automatic Upper Arm Blood Pressure Monitor Instruction Manual 1 (EN) · OMRON RS4 (HEM-6181-E) Automatic Wrist Blood Pressure Monitor Instruction Manual 1 (EN)
Gather purchase details without opening the monitor
- Who:
- you.
- How:
- do not take the monitor apart or try to repair it, because the manual warns this may cause an inaccurate reading. Find the original invoice or receipt, the model printed on the device and the purchase date.
- Result that matters:
- having at hand the details the retailer or distributor will ask for.
- If the purchase is recent:
- the OMRON manual sets a warranty of 5 years from the date of purchase.
- If you cannot find the original invoice:
- the manual says warranty is granted only with the complete product and its invoice or receipt.
- Evidence to keep:
- a photo of the invoice, of the model label and of the display showing “Er”.
Evidence: OMRON M3 Comfort AFib (HEM-7196-FLE) Automatic Upper Arm Blood Pressure Monitor Instruction Manual 1 (EN)
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Appliances
- Brand
- Omron
- Product type
- Blood pressure monitors
Known code variants
- El monitor ha funcionado incorrectamente
- Er
- Er en pantalla Omron
- Er Omron
- Er on Omron display
- Omron blood pressure monitor Er
- tensiómetro Omron Er
- The monitor has malfunctioned
What it means
In the error message table of the OMRON instruction manuals 1 for the M2 Basic, M3 Comfort AFib, M6 Comfort AFib and the RS4 wrist model, “Er” is listed as the monitor having malfunctioned. It is only a message from the device: it is not a reading and it does not replace medical advice, so for any health concern you should consult your doctor. Models other than these may differ, and no code by itself shows that a component is faulty.
Warnings and stop conditions
- Mediumeditorial warning
If anything worries you about your health, talk to your doctor: an “Er” on the monitor is not a medical opinion and says nothing about how you are.
Evidence: OMRON M6 Comfort AFib (HEM-7380-E) Automatic Upper Arm Blood Pressure Monitor Instruction Manual 1 (EN) · OMRON RS4 (HEM-6181-E) Automatic Wrist Blood Pressure Monitor Instruction Manual 1 (EN)
- Highsource verified
Never open the monitor or attempt your own repair: the OMRON manual advises against it and warns that unapproved modifications void the warranty.
Evidence: OMRON M3 Comfort AFib (HEM-7196-FLE) Automatic Upper Arm Blood Pressure Monitor Instruction Manual 1 (EN)
Symptoms and causes
Probable causes · in order
- Malfunction flagged by the monitor itselfPossible
All four manuals describe “Er” as the monitor having malfunctioned, which is why their first remedy is pressing START/STOP again and repeating the measurement.
Evidence: OMRON M2 Basic (HEM-7121J-E) / X2 Basic (HEM-7121J-EO) Automatic Upper Arm Blood Pressure Monitor Instruction Manual 1 (EN) · OMRON M3 Comfort AFib (HEM-7196-FLE) Automatic Upper Arm Blood Pressure Monitor Instruction Manual 1 (EN) · OMRON RS4 (HEM-6181-E) Automatic Wrist Blood Pressure Monitor Instruction Manual 1 (EN)
- Another electrical device too close to the monitorPossible
Ahead of the table, each manual asks you to check that no other electrical device sits within 30 cm of the monitor when a problem appears during a measurement.
Evidence: OMRON M3 Comfort AFib (HEM-7196-FLE) Automatic Upper Arm Blood Pressure Monitor Instruction Manual 1 (EN) · OMRON RS4 (HEM-6181-E) Automatic Wrist Blood Pressure Monitor Instruction Manual 1 (EN)
- Batteries with poor contact or carelessly fittedLess common
For any other problem the table asks you to remove all batteries, wait 30 seconds and refit them, which rules out an odd start caused by the power supply.
Evidence: OMRON M3 Comfort AFib (HEM-7196-FLE) Automatic Upper Arm Blood Pressure Monitor Instruction Manual 1 (EN) · OMRON M6 Comfort AFib (HEM-7380-E) Automatic Upper Arm Blood Pressure Monitor Instruction Manual 1 (EN) · OMRON RS4 (HEM-6181-E) Automatic Wrist Blood Pressure Monitor Instruction Manual 1 (EN)
Virtual technician
Does Er still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
OMRON Healthcare · 2023 · official_doc
- 2
OMRON Healthcare · 2023 · official_doc
- 3
OMRON Healthcare · 2024 · official_doc
- 4
OMRON Healthcare · 2024 · official_doc
- 5
OMRON Healthcare · 2023 · official_doc
- 6
OMRON Healthcare · 2023 · official_doc
- 7
OMRON RS4 (HEM-6181-E) Automatic Wrist Blood Pressure Monitor Instruction Manual 1 (EN)
OMRON Healthcare · 2022 · official_doc
- 8
OMRON Healthcare · 2022 · official_doc
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