Electrolux Comprehensive Guide to Combi Oven Error Codes and Solutions

Electrolux Professional S.p.A.

Ovens Platform Customer Support

Technical Training & Service

AOS_Q OVENS – Service manual

(593804600 - ENG)

1.The calibration was not done correctly. The cavity was not completely dry. Do it again.

2.An electric/electronic problem. Please verify the follow:

•230V AC at the input of the lambda switching feeder

•approximately 9.5V DC at the feeder’s output

•approximately 9.5V DC at the lambda input (if not, verify the cable integrity)

•an output from the lambda in the range of [-50mV ; -1200mV] depending on the % of humidity in the cooking chamber

•same value at the PCB input (connector X23). If there is no signal please verify the cable integrity

•if the above conditions are respected and the value stored in the parameter OLbd is still out of the correct range, the problem is in the PCB.

5 Cavity offset calibration (for lev. A and C ovens)

In order to adjust the offset of the cavity probe, enter in parameter programming and set parameters cort and OCA1 to 0.

Then run a steam cycle for several minutes and check the cavity temperature, which should stabilize at the water boiling point. If the stabilized cavity temperature is less or greater than the correct water boiling pointFPT2FPT, a corrective value can be stored in parameter OCA1.

After this, set parameter cort to 1and set parameter SEAL (altitude above sea level).

6 Error codes

Errors can be divided into 2 categories: errors (they stop the appliance) and warnings (they do not stop the appliance).

6.1Errors

EE2P: Communication error with the EEPROM

E---: If the controller detects one or more parameters which have values not permitting the minimum operational requirements, an error code will appear on the display, i.e. “E---” followed by the parameter number. Enter the programming mode and set the correct value according to the parameter list.

EtUC: Cavity over temperature; cavity temperature exceeded value stored in parameter cot.

EtUB: Boiler over temperature; boiler temperature exceeded value stored in parameter bot.

EFUN UP/DOWN: Activation of the thermal protection of the motor. On the little temperature display it will appear “UP” or “DOWN” according it is the thermal protection of the upper motor (and the motor of 6-10 grid ovens) or lower motor on 20-grid oven. The thermal protection has an automatic reset but in order to continue with the cooking process, parameter ALFn has to be reset to 0.

Etc: Tripping out of cavity limiter

Etb: Tripping out of boiler limiter

ESCH: Over temperature on the electronic board; check the cooling fan and the ventilation openings on the bottom of the control panel.

Ept1: cavity probe in open circuit (only the steam cycle – 100 °C can be selected)

Ept2: boiler probe in open circuit (only hot air cycle can be selected)

Ept3: meat probe in open circuit (only time cooking can be selected)

Ept4: by-pass probe in open circuit (only hot air, regeneration or low temperature steam cycle can be selected)

Ept8: NTC probe in short or open circuit

ECAD: Analogic/Digital converters not working (thermocouples input signal)

Ertc : No communication with the clock. On lev. C set parameter Ertc to zero

E PM: Communication error with PWM system (only gas versions)

E SL: Water level probe error (probes in short circuit). If the boiler heating elements or burners are on for a time over that one defined in parameter tbon without a water charging phase, this error message is activated. To reset it, parameter ALFn has to be reset to 0.

2PT TP See Appendix A

File: AOS ONE service manual (ENG).01.doc ©Copyright 2007 by Electrolux Professional P.8/31