D.4.2.5Boiler Extraordinary Descale Cycle - Electrolux SKYLINE 6-10-20GN Service Manual

D.4.2.5 Boiler extraordinary descale cycle
During the routine washing cycles carried out with the suggested chemicals (rinse and descale tablets) the boiler is maintained
scale free (refer to the amount and type of detergent/rinse aid to use as indicated at D.6 Cleaning cycles / Detergents / Descale.
In case of scale build up in the boiler the display may show a message with "dESS" warning code; this is not a blocking error code
message, it's a notification "I am heating up/presence of scale in boiler". In this case the technician or the user can carry out a
cleaning cycle with 2 C25 descaling tabs instead of 1. The warning code "dESS" will be shown on the display if the temperature of
the boiler will exceed the set value of parameter called "bSCt" (Boiler Scale build up threshold) set at 115℃ for Electric and 110℃
for Gas versions (HIDDEN PARAMETER). In case of excessive scale build up in the boiler, the display will show a message with
"dESC" blocking error code. The error code "dESC" will be shown on the display if the temperature of the boiler will exceed the set
value of parameter called "bSCu" (Boiler Scale build up threshold) set at 125℃ for Electric and 115℃ for gas versions (HIDDEN
PARAMETER).
The error code "dESC" cannot be skipped and it is necessary to perform a complete descaling of the boiler by the mean of the
"boiler maintenance - zerolime descale" cleaning cycle with 3 descaling tabs of C25.
ELECTRIC MODELS
115℃ "DESS" (Warning)
125℃ "DESC" (Blocking boiler)
IMPORTANT
If the user descale cycle is not carried out the next step will be a blocking alarm message "EtUB" ( HIDDEN PARAMETER
"bot" set at 135℃ for electric ovens and 125℃ for gas ovens).
With "EtUB" alarm, all boiler cycles will be stopped.
To reactivate them you must to carry out the specific descaling cycle that can be activated in the dedicated service area
D.4.2.4 Clean table (CLN tAbL)/KILL clean/descale boiler.
To START the DESCALING of the BOILER. Insert 3 tabs of C25 and start by pressing "0".
The process will last 1' 30" and needs to be carried out with 3 specific C25 descale tabs. Refer to the amount of tabs at D.6 Cleaning
cycles / Detergents / Descale.
NOTE!
The boiler descale operation cannot be carried out "manually". The boiler is not equipped with an external access as in
previous models. If the cycle is completed without interruption the counter parameter relative to the descale will add 1
unit (+1). Also refer to the COUNTER LIST DETAIL section.
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GAS MODELS
110℃ "DESS" (Warning)
115℃ "DESC" (Blocking boiler)