Operation - Cdi; Initialisation; Display Messages - Worcester CDi Combi N.G Service Booklet

OPERATION - CDI

3 OPERATION - CDi
3.1

INITIALISATION

When it is switched on, the appliance performs a self-
test which takes about 10 seconds.
While the test is in progress, the display shows for the
first two seconds . Additionally buttons
light up orange and the reset button lights up red.
Afterwards the display shows the CH flow temperature.
On completion of the test sequence the appliance is
ready for operation.
3.2

Display messages

The 7-Segment-Display has following display messages
(table 2 and 3):
Displayed value Description
digit, dot Service function
followed by
letter
letter followed Error code
by digit or letter
two digits decimal value e.g. flow
temperature
U followed by decimal value;
0..9 100..109 will be displayed
as U0..U9
one digit (long decimal value (triple-digit);
displayed) first digit will be displayed
followed by two alternating with two last
digits twice digits (e.g.: 1...69..69 for
(short displayed) 169)
two dashes code plug number;
followed by two the value is displayed in
digits twice 3 steps:
1. two dashes
2. two first digits
3. two last digits
(e.g.: -- 10 04)
two letters version number;
followed by two the value is displayed in
digits twice 3 steps:
1. two first letters
2. two first digits
3. two last digits
(e.g.: CF 10 20)
Tab. 2 Display messages
12
Supplied By www.heating spares.co Tel. 0161 620 6677
Special
messages
and
Range
00..99
0..109
0..999
1000..
9999
Tab. 3 Special display messages
8 716 115 748 (2009/09)
Description
Key acknowledgement after pressing
one button (except reset button)
Key acknowledgement after pressing
two buttons simultaneously
Key acknowledgement after
pressing button longer than 3
seconds (storage function)
The display shows alternatively the
CH flow temperature and
appliance works continuously at the
minimum power (see service
function 2.F).
The display shows alternatively the
CH flow temperature and
appliance works continuously at the
maximum power (see service
function 2.F).
Appliance is in Air purge mode, see
service function 2.C.
The display shows alternatively the
CH flow temperature and
Syphon-fill programme is active. See
service function 4.F
The display shows alternatively the
CH flow temperature and
reminding that the next service is
due. The burner service interval of
2324 hours has run out. See service
function 5.F.
The display shows alternatively the
CH flow temperature and
pump is blocked. See error E9.
The display shows alternatively the
CH flow temperature and
gradient limitation is active. The
primary temperature is rising too
fast and the burner has switched off
for 2 minutes. See error E9.
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