Electrolux LS6EA, WT38, LS14EA, WT65E General Manual

Identification:

Technical
Bulletin no:

Date:
Issuer:
Factory:

Subject

Model

Problem
Reason
Action in

Factory

main board 0L1238

Firmware release

4.0260004

D02-D04

CGX2006-26 (page 1 of 2), 2nd ed.

08 March 2007
R. Sartor (DWS Customer Support)
DW Vallenoncello - Italy

Water Leakage at the Rear Window of CWS machines

Undercounter LS6EA / WT38 and Hood Type LS14EA / WT65E with
Continuous Water Softener built-in.

Water leakage from the rear open window (air break).
Tank filling not properly set or boiler/tank filling not working properly.
Since serial number 61700001 we have introduced the firmware release

4.0260004 in main boards 0L0731 (not lead-free) and 0L1238 (lead-free) with

following new features:

• Disabled tank filling by boiler overflow whether SEr = 9 even if btF = 0.
Therefore Undercounter/Hood Type with Continuous Water Softener built­in are always filled by short rinse cycles (btF = 75 as standard).

• Disabled tank filling by boiler overflow if the water level decreases
because of:

1. level switch malfunctioning

2. over-flow pipe not fitted properly

3. drain cycle / self-cleaning cycle stop manually before the end

4. opening door during drain cycle / self-cleaning cycle

5. drain hose connected as for gravity drainage instead of having outlet

between 750 mm and 1000 mm from the floor (see handbook).
Therefore Undercounter/Hood Type with Continuous Water Softener built­in are

• Decreased inlet valve delay from 3 seconds to 2 seconds since reed
sensor at the rear has open circuit (float level switch is in upper position).

This parameter cannot be changed by the user interface.

always filled by short rinse cycles.

Firmware release

4.0260004

ELECTROLUX PROFESSIONAL SPA
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33170 PORDENONE - ITALY

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33170 PORDENONE - ITALY

++39 0434 380650 www.electrolux.com 00072220932

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[e-mail]

Action in
Field

See the Technical Bulletin CG2006-12 “Firmware 4.02 in UC/HT with CWS”
and the Service Manual – from edition 03.2006 onwards - for more details
about new feature in firmware release 4.02 and above parameters.

Moreover you should check if:

1. the reed sensor at the rear works properly moving the floater up/down with
a magnet and checking the main board with a tester.
If it’s out of its position or unstable, you can fix the reed connector with
Loctite (be aware about contacts!).

2. the inlet valve has water flow reducer of 5 l/min removing the white filter
with pliers. The reducer has to be black (there's also a black gasket so
don't confuse water flow reducer and gasket).

Do NOT fit an inlet valve with higher water flow.

For instance, the 502016 WT38WS has inlet valve 0L0776 with water flow
reducer 5 l/min while the same model without Continuous Water Softener
built-in, the 502112 WT38, has inlet valve 0L0568 with water flow reducer
10 l/min. And pressure boiler machines have even higher water flow (20
l/min).
Undercounter/Hood Type with Continuous Water Softener built-in have
inlet valve 0L0776.

Gasket

The inlet valve

0L0776 (water flow

reducer 5 l/min).

Reed sensor that drives

the inlet valve by

detecting the floater

The floater

Gasket

The inlet valve

0L0568 (water flow

reducer 10 l/min).

2