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Electrolux Professional S.p.A.
Ovens Platform Customer Support
Technical Training & Service
AOS_Q OVENS – Service manual
(593804600 - ENG)
File: AOS ONE service manual (ENG).01.doc ©Copyright 2007 by Electrolux Professional P.8/31
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
point
TPF
2
FPT, 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).
6.1 Errors
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.
TP
2
PT See Appendix A