Technical data

6 720 611 443 GB (03.11)
34
Maintenance
8.1 Pre-Service Check List
Date
1Call up the last fault stored by the
Bosch Heatronic, Service Function .0,
(see page 35).
2Check ionisation current, Service
Function 3.3, (see page 35).
3Perform visual check of air/flue
duct.Visual check of diaphragm for
soiling and splits (see page 37).
4Check gas supply pressure
(see page 30).
mbar
5Test combustion air/flue gas
(see page 32).
6Check CO
2
setting for min./
max. (gas/air ratio)
(see page 30).
min. %
max. %
7Check gas and water systems for
leaks (see page 16).
8Check heat exchanger
(see page 35).
mbar
9Check burner (see page 36).
10 Clean condensation trap
(see page 36).
11 Check charge pressure of
expansion vessel matches
static head of heating system.
mbar
12 Check central heating system
pressure.
mbar
13 Check electrical wiring for damage.
14 Check heating programmer settings.
15 Check appliances that are part of
the heating system.
Table 16