Identification:
Technical
Bulletin no:
Date:
Issuer:
Factory:
Subject
Model
Reason
Action in
Factory
D06
CGX2007-08 (page 1 of 4), 2nd ed.
29 March 2007
R. Sartor (DWS Customer Support)
DW Vallenoncello - Italy
Firmware 1.52 and 1.53 in WTM & RTC/WTC
Whole Modular Rack Type range (Electrolux WTM series) and Compact Rack
Type range (Zanussi RTC series and Electrolux WTC series)
New features and new procedures to avoid alarms 72, 73 and 78.
Since serial number 71300001 we have introduced the firmware release 1.52
in User Interface 0L1285 and MEC board 0L1284 for WTM and the firmware
release 1.53 in User Interface 0L1196 and MEC board 0L1291 for RTC/WTC
(spare part codes are not changed).
The new firmware has new features/procedures as listed here below.
Most of them can be implemented just replacing the Master board (either
User Interface in WTM or MEC board in RTC/WTC). Remaining ones can be
implemented only replacing both Master board and Slave boards.
MEC board
User
interface
User
interface
MEC boardsMEC boards
ELECTROLUX PROFESSIONAL SPA
MAILING ADDRESS TELEPHONE WEBSITE VAT NO.
VIA SEGALUZZA, 30
33170 PORDENONE - ITALY
OFFICE ADDRESS TELEFAX E-MAIL ADDRESS
VIA SEGALUZZA, 30
33170 PORDENONE - ITALY
++39 0434 380650 www.electrolux.com 00072220932
++39 0434 380636
++39 0434 385646
riccardo.sartor@electrolux.it
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New feature
WHAT TO CHANGE
Modular RT Compact RT
User
Interface
master
MEC
board
slave
MEC
board
master
User
Interface
slave
MEC
board
slave
US range parameters
nd
boiler, 2nd inlet valve, etc.)
(2
Visible and modifiable tank levels and air-gap level (both maximum level
and working level)
Visible 2nd boiler temperature (US range), dryer temperature and feeding
motor current load
Boiler thermoregulation only during warm-up and wash/rinse (it avoids
boiler overheating during the stand-by
Parameters reset (the default is a WTM165 without dryer)
Pressure sensors calibration
Peak energy control (timeout alarms about all heaters are disabled)
Boiler temperature timeout alarm disablement
Dryer temperature cool-down procedure (to avoid alarms 72 and 73)
• the fan works even when machine switches from ready/wash to warm-
up;
• the fan works for 1 minute after switching-off (by control panel) if the
dryer temperature is over 60°C. Then it stops automatically;
X
X X
X X
X X
X X
X X X X X
X X
X X
• the alarm 72 appears only if the dryer temperature is over 80°C for 2
minutes while the fan is working
Alarm 72 and 73 may still appear if the machine is off/on by the main
switch instead of control panel because in that case the fan motor has to
stop working straight after switching-off if (for safety reasons).
See “Action in Field” below for more details about the “DT fan delay” /
“AFd” parameter and the cool-down procedure.
Reviewed air-gap draining procedure to avoid cavitation in case the air-
gap is already empty
Wash temperature and Prewash temperature timeout alarm (only during
warm-up and sanitization cycle for the Wash module, only the sanitization
cycle for the Prewash module)
X X
X X
X X
2
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New feature
Reviewed hysteresis for air-gap working level to avoid frequent on/off
during first air-gap filling
Visible alarms on the inverter display even in case of alarm 27 (the safety
chain - 24V circuit - is kept supplied)
Delay between door closing/emergency switch activation and the status
“ready” (the inverter needs few seconds for switching on otherwi se the
alarm 27 may appear)
Message “see items inside” in Compact RT or “crockery stuck” in Modular
RT instead of alarm 78 in case of items get stuck into the machine
Entry level Hot Air Blower (HAB) control
This HAB is not in production yet
WHAT TO CHANGE
Modular RT Compact RT
User
Interface
master
MEC
board
slave
X X
X X
X X
X X
X X X X X
MEC
board
master
User
Interface
slave
MEC
board
slave
Reviewed “Low power” heating mgt (both tank heaters work during warm-
up). Available only in WTM165 and WTM200
The duo rinse heater can work separately (it’s needed in steam versions
where there are neither tank heaters nor boiler heaters)
User menu accessibility even in case of communication alarm
Action in
Field
The new firmware 1.52 for Modular Rack Type (Electrolux WTM series) and
1.53 for Compact Rack Type (Zanussi RTC series and Electrolux WTC series)
is compatible towards previous firmware versions from 1.40 onwards.
See Service Manual – edition 02.2007 for more details about new
features and new parameters.
MEC board 0L1284
WTM
User interface 0L1285
MEC board 0L1291
RTC / WTC
User interface 0L1196
spare part
code
production
673610100
673610000
673610200
673608201
OLD NEW
code
X
X
X
firmware
release
1.46
1.46
1.47
1.29
n.a. n.a. n.a.
n.a. n.a. n.a.
n.a. n.a. n.a.
production
code
673610101
673610001
673610201
673608202
firmware
release
1.52
1.52
1.53
1.53
3
About alarms 72 and 73, the “DT fan delay” / “AFd” parameter we introduced from firmware
release 1.24 onwards does NOT affect the new cool-down procedure.
The “DT fan delay” / “AFd” sets how long the fan motor works after that dryer heater stops
working when the machine is on:
In any case, both dryer fan delay function and new cool-down procedure above can be
implemented in early production dryers just moving the cable from X6:7 to X6:5 so that the
relay RL5 for the dryer fan is connected 24V to the transformer, at the end of safety devices
chain (this change has been introduced in corner dryer since serial number 61800001 and
remaining dryer tunnels since serial number 64600001):
Additional cable for
“DT fan delay” /
“AFd” function
4
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