Technical data
7 181 465 346 GB (03.02)
6
Bosch Heatronic board functions
2 Bosch Heatronic board func-
tions
2.1 Initialisation
When it is switched on, the appliance performs a self-
test which takes about 5 seconds. While the test is in
progress, the display shows the following sequence of
codes:
P1
->
P2
->
P3
->
P4
->
P5
->
P6
On completion of the test sequence the appliance is
ready for operation.
2.2 Temperature display
The display shows the current flow temperature in cen-
tral heating and hot water modes. The display range
extends from 00 ˚C to 99 ˚C.
If a service function requires the display of a tempera-
ture greater than 99 ˚C, the display alternates between
initially showing the first digit and then the remaining
two digits.
E.g.
: display showing
1.
followed by
69.
indicates
169˚C
.
For outside temperatures, the display shows a minus
sign followed by the negative temperature in alternation.
2.3 Indication of faults
Faults are indicated by a letter code. This helps to iden-
tify and eliminate the cause of the fault quickly and reli-
ably.
The fault codes displayed are grouped into four catego-
ries:
•
Category 1:
The appliance is disabled until it has been switched
off and then on again.
•
Category 2:
The appliance is disabled until the cause of the fault
has been eliminated.
•
Category 3:
The appliance continues to operate with limited func-
tion.
•
Category 4:
The appliance is disabled and locked ( flashes)
until the cause of the fault has been eliminated and
the appliance unlocked.
2.4 Special programme visualisation
The display shows for example 45
– –
45 (continu-
ous working at the minimum sanitary/heating
power)
The display shows alternatively the temperature
and
– –
. The function is memorised in the Service mode.
• The appliance works continuously at the sanitary or
heating minimum power.
B
Press the button until the symbol
– –
appears on
the display.
The button is lighted.
B
Turn the temperature control until function
2.0
appears on the display.
After a short delay, the display shows
1
for minimum
output.
B
Turn the temperature control completely anti-
clockwise until the display shows
0
.
B
Press the button until the symbol
[ ]
appears on
the display.
The display shows the heating outlet temperature.
The display shows for example 55
– –
55
(continuous working at the maximum power)
The display shows alternatively the temperature and
– –
.
The function is memorised in the Service mode.
• The appliance works continuously at the maximum
power.
B
Press the button until the symbol
– –
appears on
the display.
The button is lighted.
B
Turn the temperature control until function
2.0
appears on the display.
After about 5 seconds the display will show
2
for the
maximum power.
B
Turn the temperature control completely anti-
clockwise until the display shows
0
.
B
Press the button until the symbol
[ ]
appears on
the display.
The display shows the heating outlet temperature.
Display shows 45 -II- 45 (trap filling programme)
The trap filling programme ensures that the condensa-
tion trap is filled after the appliance is first installed or if
it has been switched off for a long period.
The trap filling programme is activated if:
• the appliance is switched on at the master switch
• the burner has not been in operation for at least 48
hours
• the appliance is switched from summer to winter
mode.
i
Unlocking the appliance:
B
Press and hold the button until the
display shows
– –
.