SERVICE MANUAL
ADVANCE OVENS
04/02/2020 103
Once the message DESCALE has been displayed, it will not disappear until descaling takes place, even though the
TG temperature falls or if the oven is switched off. The message reappears when the oven is switched on.
16.16.2. PROCEDURE FOR DESCALING
To descale, enter the function by pressing the Auxiliary Function Selector and select the option DESCALE. Confirm
the option by pressing the Auxiliary Function Selector or the General Selector.
The message displayed is SELECT. TIME, descaling time between 30 and 480 minutes (120 default setting).
Wait until the user confirms the selection with the button on the wheel.
Phase 1: VAC operates for 3 minutes
The message
“SPRAY DESCALER” is displayed and the process waits until it is confirmed with the General
Selector. Undo the side panel of the oven and access the steam generator. Undo the descaling nut and pour the
descaler in the steam generator.
Phase 2: VDV operates until reaching the maximum level, the boiler fills with descaler.
Phase 3: CV operates until TG reaches 61ºC. When TG falls below 58 ºC, CV starts again (steam heating) until
reaching 61 ºC, this continues for the period selected by the user. The display shows a countdown for the time
remaining.
Phase 4: VAC operates for 3 minutes.
Phase 5: VDV operates until reaching N.max.
Phase 6: VAC operates for 3 minutes.
Phase 7: VDV operates until reaching N.max.
Phase 8: Steam mode operates until TC reaches 95 ºC.
Lastly, this function is closed and the message END DESCALING, s displayed, all the outputs are set to zero (except
RG) until the oven is switched off.
The current phase number FX DESCALE and the time remaining are displayed continuously.
If during the descaling cycle the operation is aborted by pressing the descaling button again or because the oven
has been switched off, proceed as follows:
If it has not reached phase 2
The cycle is ended.
If it has reached or exceeded phase 2
The cycle goes to phase 4.
If it has reached phase 4
The cycle goes to the phase in which it stopped.
There is a secret option to abort the process by pressing the O/I button for 5 seconds. The machine moves to
Phase 6. Confirm by pressing START/STOP.
The chemical product used must have a phosphoric acid base at a concentration of 35 ÷ 40 %. It may contain an
anti-foaming agent. A chemical concentration of approximately 10÷ 5% of the capacity should be used in the boiler.
This concentration depends on the degree of lime scale saturation and the effectiveness of the chemical product.
Please refer to the supplier for advice on the method of application.
Boiler capacities
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