Technical information

20
1
2
3
4
5
6
1
2
3
4
5
6
E
C
II
I
JK
LEGEND:
A -
On/Off Button
B - Domestic Hot Water Temperature Adjustment
C - Central Heating Temperature Adjustment
D - Reset Button/Flue Test analysis mode*
E - Comfort Mode Selector
F - Summer Mode LED (Green)
G -
Ignition/Overheat Lockout LED (Red)
H - Central Heating (Winter Mode) LED (Green)
I - Digital Display (Fault Code/Water Temperature)
J - Time Clock
K- Central Heating System Pressure Gauge
2.10 CONTROL PANEL
FI
G
. 2.20
F
R020A
* Warning the flue analysis mode must only be selected by a
qualified service engineer. See Section 3.4 for further
instructions
The Control Panel has a 3 digit display, during normal operation the
display will show one of three things on the two right hand digits;
During Stand-by (no demand for Central Heating or D.H.W.) ‘
on’ will be
shown on the display and no LEDs will light.
During a demand for Domestic Hot Water, the temperature of the
outgoing hot water is displayed in
o
C (e.g. 38) and the summer mode
LED will light (
F - FIG. 2.20).
During a demand for Central Heating, the temperature of the central
heating flow will be displayed in
o
C (e.g. 65) and the central heating
mode LED will light (
H- FIG. 2.20).
During the operation of the flue analysis mode* the display will show
‘
sc’.
Should a fault occur the display will show the fault code and one of
two letters, for a non-volatile shutdown the letter ‘
A’ will be shown
followed by the two digit code for the fault eg. ‘
A02’ and the red
LED (
G - FIG. 2.20) will light, a non-volatile shutdown will require the
reset button (
D - FIG. 2.20) to be pressed once before the boiler will
attempt to relight, should the boiler lockout again, the assistance of
an Authorised Service Engineer should be sought.
Should the boiler de
velop a fault that cannot be corrected by
resetting the boiler, the letter ‘E’ will be displayed followed by a two
digit code (e
.g.
E33) indicating a v
olatile shutdo
wn code
, in the
event of such a shutdown, the boiler will automatically resume
operation once the cause behind it is resolved. Should it not, the
assistance of an A
uthorised Service Engineer would be required.
A list of the fault codes can be found opposite.
2.11 DIGITIAL DISPLAY AND FAULT CODES
DISPLAY CAUSE
AA 0011
No flame after safety time (7 seconds)
AA 0033
The heating flow temperature exceeds 103
o
C
during operation
AA 7777
Condensate Trap full of water
Condensare sensor short circuited
Condensate sensor in open circuit
AA 9977
Problem with the electronic monitoring
AA 9988
Problem with the electronic monitoring
AA 9999
Problem with the electronic monitoring
EE 0022
Insufficient w
ater pressure
EE 0044
Domestic hot w
ater temper
ature probe in
open circuit
EE 0055
Domestic hot w
ater temper
ature probe
short circuited
EE 0066
Heating flo
w temper
ature probe in open
circuit
EE 0077
Heating flo
w temper
ature probe shor
t
circuited
EE 0088
Heating retur
n temper
ature probe in open
circuit
EE 0099
Heating return temperature probe shor
t
circuited
EE 2200
Flame detected with gas valve closed
EE 2211
Error in the electrical connection (live and
neutral crossed)
EE 3333
The air pressure switch is closed before the
ignition sequence has begun
EE 3344
The air pressure switch does not close
when the fan runs
EE 9999
More than 5 RESETS of the boiler
in 15 minutes.