MEIKO Commercial Dishwasher Error Code ERR 201: Boiler Not Filled
ERR 201 on the UPster U 400 M2 display reads Boiler level not reached during first filling (with integrated pressure booster pump). The manual lists a closed tap, a kinked or leaking feed hose, a soiled inlet filter, or a defective solenoid valve or boiler switch as causes.
High: the boiler does not fill, so the machine cannot run a normal wash until the cause is fixed.
- Code
- ERR 201
- Maker
- MEIKO
- Equipment
- Dish machines
- Applies to
- Meiko UPster U 400 M2 glass and dishwasher, M001DWUC10M2-10
What does MEIKO error code ERR 201 mean?
On first filling, the UPster U 400 M2 fills its boiler with fresh water through the inlet, and the boiler level switch tells the control when the water has reached the right level. If the level is not reached, the control shows ERR 201, Boiler level not reached during first filling (with integrated pressure booster pump). The manual lists the causes as an insufficient fresh water inlet (for example a closed tap), a feed hose that is kinked, disconnected or leaking, a soiled inlet filter, and a defective solenoid valve or boiler switch. Its listed actions are to check the water supply and feed hose, clean the pre-filter or sieve, and call a service technician if needed. The wording in brackets shows this version belongs to machines fitted with the integrated pressure booster pump. The display reads Boiler level not reached during first filling.
Affected models and control systems
This code is listed for the Meiko UPster U 400 M2 glass and dishwasher, type M001DWUC10M2-10, in section 9.6.1 Messages (the ERR table on printed pp. 34-35).
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
- ERR 201 with the text Boiler level not reached during first filling
- Machine stops during the first fill
- No water or only a trickle entering the machine
Possible causes
Likely causes — what usually sits behind error code ERR 201 on this control. A technician confirms which one it is before any part is replaced.
- Fresh water inlet insufficient, for example the tap is closed
- Feed hose kinked, disconnected or leaking
- Inlet filter soiled
- Solenoid valve or boiler switch defective
- Scale or sediment from hard water collecting in the pre-filter faster than expected
- Water pressure in the building low at busy times
- Pressure booster pump not delivering enough water into the boiler
Safe checks before calling for service
- Check that the water tap or shutoff valve to the machine is fully open.
- Look along the feed hose for kinks, a loose fitting or dripping water.
- Clean the pre-filter or sieve in the supply line, as the manual says, after closing the tap.
- Open the tap, switch the machine off and on, and try the first fill again.
- If ERR 201 returns, note the water pressure at the tap, what you checked and when it started, for the service call.
How a technician diagnoses error code ERR 201
- Confirm supply pressure and flow at the machine's inlet.
- Inspect and clean the inlet filter and the sieve.
- Test the solenoid valve for correct opening when it is energized.
- Check the boiler level switch operation and its wiring.
- Check the pressure booster pump delivers water to the boiler.
- Replace the part that fails its test and run the first fill again.
- Testing the solenoid valve and level switch means working at live wiring in a machine with water present.
- The pressure booster pump and boiler are inside the machine and carry hot water and pressure.
- Confirming the boiler switch works needs the machine's test routine and a meter.
Technical reference
- Document
- UPster U 400 M2 Glass- and dishwasher - Original operating instructions (type M001DWUC10M2-10)
- Edition
- 9760441 / Valid from: 2018-02 / Update: 2026-06
- Models / control
- Meiko UPster U 400 M2 glass and dishwasher, M001DWUC10M2-10
- Section
- 9.6.1 Messages: INFO table printed p. 33, ERR table pp. 34-35 (of 50)
- 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 ERR 201 a water supply problem?
Often, yes. The manual lists a closed tap, a kinked or leaking hose and a dirty inlet filter first. Check those before calling.
Can I keep working with ERR 201?
The excerpt we used does not give a continue-working statement for this code; the boiler did not fill, so the machine cannot run a normal cycle.
How is ERR 201 different from ERR 202?
ERR 201 is about the level not being reached on first filling. ERR 202 is about the level not being reached in time during filling, with the same causes.
Need help with MEIKO error code ERR 201?
A technician confirms the cause on site and gives you the price in writing before any work starts.