Hello evrey one How to solve error 2 in cmp rational oven

Examine the oven's control panel to identify any error codes or displayed indicators.

Steam Generator Issue. Call for service, you can't fix these yourself as they are fully computer controlled. Maintaining them is a cost of doing business.

RATIONAL COMBI MASTER PLUS'SERVICE ERROR CODE'S

thehanadvisor.com https://www.thehanadvisor.com > ... > RATIONALCM
Each code will tell you what's wrong with the oven, allowing you to tackle the issue quicker. NOTE: PLEASE SUBSCRIBE E MAIL AND YOU-TUBE CHANNEL. OPEn / H2o.

more here

https://www.google.com/search?q=rational+combimaster+error+code+E17

Manual

https://www.rational-online.com/media/downloads/en-gb/manuals/rational-original-operation-manual-cmp-en-gb.pdf

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you have a code that is not documented, phone their service department. It is probably just advising there has been a power outage.

https://www.techtownforum.com/2020/02/20/rational-scc-service-codes/

From Rational

Training manual Trouble Shooting

https://portal.rational-online.com > englisch_1 > T...
PDF
CM shows error code E12; cabinet temp. display shows 1 CO: Bus problem bottom motor. 2 ST and 2 CO refer to the upper motor. SCC shows Service 34.2.

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  Operating instructions SelfCooking Center® - Rational

  https://www.rational-online.com > en-xx > manuals
  PDF
  The status of the preheating temperature is displayed in red and blue. The end of a cooking process is indicated by the flashing Self-. Cooking Control® button.

Looks like a defective thermocouple. The fix is to replace the thermocouple.

https://www.techtownforum.com/2020/02/20/rational-scc-service-codes/

https://www.thehanadvisor.com/2020/06/rational-combi-oven-error-codes.html

https://www.partstown.com/rational/thermocouples-thermopiles/parts

https://portal.rational-online.com/fs4p/media/service/4_training_1/2_trainingshandbcher/englisch_1/Trouble_Shooting_SCC_Line_EN.pdf

https://www.rational-online.com/en_us/customercare/contact-us/

check link below
https://www.google.com/search?q=Rational+oven+model+number+CMP+202+says+E34+please+help%3F&oq=Rational+oven+model+number+CMP+202+says+E34+please+help%3F&aqs=chrome..69i57&sourceid=chrome&ie=UTF-8

Page 105 of the manual.

Cooking cabinet temperature selector switch defective. - Notify customer service!

https://www.rational-online.com/media/downloads/en-us/manuals/80-02-406-bedienungsanleitung-cmp-en-usa.pdf

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So I found the service manual for this model.

https://www.rational-online.com/media/downloads/en-gb/manuals/rational-original-operation-manual-cmp-en-gb.pdf

The list of codes is on page 105. Code E34 is simply listed as contact customer service. Which is not really all that helpful in diagnosing the problem. Have you tried to reset the oven? Disconnect the power cord for 2-3 minutes and trying again? If this doesn't work, given the general code, you should call the customer service number in the manual.
Hope this helps.

Press timer key to delete the error after you changed the battery

If it is a Rational CM or CMP gas oven, then there is a problem with the ignition module.

It looks like a faulty gas ignition module