What does Rational E40 mean?

E40 (Service 40) on Rational SelfCookingCenter and iCombi units indicates the Care pump is not delivering enough Care solution into the steam generator during a CleanJet + Care cycle.

What does Rational E12 mean?

E12 on Rational SelfCookingCenter and CombiMaster units signals a cooling-system fault tied to the cavity or electronics cooling fan circuit.

What does Rational E60 mean?

Service 60 (displayed as E60 on some Rational SelfCookingCenter whitefficiency and iCombi models) indicates that the gas ignition box failed to initialize correctly during startup.

How do I perform a Rational oven service reset?

For a full service reset on the Rational iCombi Pro: press and hold the iCombi logo for 5 seconds. Select 'Service' from the menu (requires service technician access code 1234 for first-level or the Rational dealer code). Service mode gives access to component tests, error logs, and parameter reset. Do not change parameters without referring to the Rational service documentation.

How do I clean a Rational oven using the automatic care program?

The Rational Care program requires Rational Care Tabs (solid cleaning tablets) and rinse aid. Select 'Care' from the main menu, then choose the appropriate care level (light, medium, or strong) based on usage intensity. Insert the tabs into the care drawer and start the program. The cycle takes 30-90 minutes depending on level. Never use alternative cleaning products — they can damage the oven's stainless steel and void the warranty.

What does Rational Service 40 (E40) mean and how do I clear it?

Service 40 (E40) on SelfCookingCenter and iCombi Pro indicates the Care pump did not deliver enough Care solution into the steam generator during a CleanJet + Care cycle, so the oven aborts the run and blocks further automatic cleaning. Verify the Care tab container is full and seated, trace the dosing hose for kinks or air locks between the canister and pump, confirm inlet water pressure meets the nameplate spec, and clean the water filter. Manually actuate the Care pump in service mode — a pump that hums without pumping is airlocked or seized and must be replaced. After a mechanical fix, run a successful rinse or CleanJet cycle so the control confirms dosing is restored and clears the stored fault.

How do I diagnose Rational E12 on an iCombi or SelfCookingCenter?

E12 signals a cooling-system fault tied to the fan that cools the electrical compartment behind the control panel. The control expects a feedback signal from this fan; if it fails to spin at commanded speed, the oven halts the cycle to protect the PCB and electronics from thermal damage. Power down at the breaker and let the cabinet cool, then remove the service panel and check the fan for grease buildup, debris, or seized bearings — restricted airflow is the most common trigger and is fixed without parts. Reseat the fan harness, confirm drive voltage at the connector when commanded to run, and replace the motor if voltage is present but the fan does not spin. Verify the oven has the minimum side, rear, and top clearances per the installation manual; insufficient clearance retriggers E12 even after a fan replacement.

Commercial Kitchen

Rational error codes, decoded.

Look up any Rational fault code below. Each one is grounded in Rational's own service documentation — the meaning, the symptoms, the causes, and the steps to clear it.

Quick answer

Rational SelfCookingCenter and iCombi Pro combi ovens display E-prefixed alarm codes and Service notifications on the touch screen. Sensor faults appear as E1 (core probe) and E8 (climate sensor); the steam generator and CleanJet + Care system flag E30, E40 (Service 40), and E60; gas units add E11 for flue-gas overtemperature. AskWhiz indexes every published Rational code.

By Nichita Herput

Co-founder & CEO · Reviewed May 2026

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Rational sits in our Commercial Kitchen coverage. Every page here is transcribed from the manufacturer's manuals, not scraped from forums.

What error codes does Rational display?

Tap a code for the full breakdown — meaning, symptoms, causes, and fix steps.

E40

4 up to G11SE.... is displayed at the top of the image. Below is a labeled diagr

E12

SE0404 up to E12SE...." Below this, the text reads "Electrical unit" and "Contro

E60

S11607 CleanJet + Care The image displays a line art diagram with various mechan

E11

ME0404 up to E11ME0601," and "Electrical unit Control panel Voltage 3 AC 208V 60

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Common questions about Rational equipment

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