6 720 611 137 GB (03.02)
Maintenance
33
8.1
Pre-Service Check List
Date
1
Call up the last fault stored by the
Bosch Heatronic, Service Function .0,
(see page 34).
2
Check ionisation current, Service
Function 3.3, (see page 34).
3
Perform visual check of air/flue
duct.Visual check of diaphragm for
soiling and splits (see page 36).
4
Check gas supply pressure
(see page 29).
mbar
5
Test combustion air/flue gas
(see page 31).
6
Check CO
2
setting for min./
max. (gas/air ratio)
(see page 29).
min. %
max. %
7
Check gas and water systems for
leaks (see page 16).
8
Check heat exchanger
(see page 34).
mbar
9
10 Clean condensation trap
11 Check electrical wiring for damage.
12 Check heating programmer settings.
13 Check appliances that are part of
the heating system.
Table 15
