MEIKO Commercial Dishwasher Error Code 22: Demo Mode Active
Code 22 on the M-iClean U display reads Attention: demo mode! (no washing/final rinsing). The exhibition function is active, and the manual describes it as information only.
Medium: the machine runs but does not wash or rinse, so ware cannot be used safely until demo mode is off.
- Code
- 22
- Maker
- MEIKO
- Equipment
- Dish machines
- Applies to
- Meiko M-iClean U glass, utensil and dishwashers, series M007DWUC10M*
What does MEIKO error code 22 mean?
The M-iClean U has an exhibition, or demo, function used to show the machine without washing. When that function is switched on, the control shows message 22, Attention: demo mode! (no washing/final rinsing), as a warning that the machine is not actually washing or doing a final rinse. The manual's action reads as information only on the activated exhibition function, and no causes are listed because the message is a status notice and not a malfunction. This matters in a working kitchen, because glassware and utensils run in demo mode do not get washed or rinsed, so they would come out unclean. The display shows the text Attention: demo mode! With the number 22. The manual excerpt we used does not describe how demo mode is switched on or off, so we do not give a procedure for it.
Affected models and control systems
This message is listed for the Meiko M-iClean U glass, utensil and dishwashers, series M007DWUC10M*, in section 9.4.1 Messages.
Code numbers and their meaning can change between control generations. We match the full model and control before acting on a code.
What you may notice
- Message 22 with the text Attention: demo mode! (no washing/final rinsing)
- Cycles that run without washing or final rinsing
- Ware coming out still dirty
Possible causes
Likely causes — what usually sits behind error code 22 on this control. A technician confirms which one it is before any part is replaced.
- The exhibition (demo) function has been activated on the machine
- Demo mode was switched on for a showing or training and not switched off afterward
- A setting was changed by mistake in the machine's menu
- Settings were reset to a configuration that includes demo mode
Safe checks before calling for service
- Stop running ware through the machine while message 22 is showing.
- Check with the manager whether the machine was put in demo mode on purpose.
- Do not guess at menu changes; ask the person who manages the machine settings.
- Write down the message, the date and whether any ware was run in demo mode for the service call.
How a technician diagnoses error code 22
- Confirm the machine is in the exhibition function and not a different problem elsewhere.
- Open the configuration menu with the proper access level and find the demo setting.
- Switch the function off and save the setting.
- Run a full cycle with ware and confirm washing and final rinse actually take place.
- The demo setting sits in a protected menu that needs the right access code.
- A wrong menu change can alter wash temperatures or rinse behavior, which affects food safety.
- After switching demo mode off, the first real cycle should be checked by someone who can see the wash and rinse stages.
Technical reference
- Document
- M-iClean U Glass, utensil and dishwasher - Original operating instructions (types M007DWUC10M*-****)
- Edition
- 9763258 / Valid from: 2018-09 / Update: 2026-06
- Models / control
- Meiko M-iClean U glass, utensil and dishwashers, series M007DWUC10M*
- Section
- 9.4.1 Messages, printed pp. 43-45 of 70 (PDF pp. 43-45)
- Checked
- October 2026
We use the maker's document to read the code and do not reproduce it. Always confirm the complete model and control before applying these steps.
Related MEIKO dish machine error codes
Is code 22 an error?
No. The manual describes it as information about the activated exhibition function.
Can I wash dishes in demo mode?
No. The message itself says there is no washing or final rinsing, so ware would not be cleaned.
How do I turn demo mode off?
The manual excerpt does not give the steps, so ask your technician or the person with the protected menu code.
Need help with MEIKO error code 22?
A technician confirms the cause on site and gives you the price in writing before any work starts.