Baxi Platinum 2 Combi 28 GA Installation & Servicing Instructions Manual page 52

F
Check and correct if necessary
1. Ignition electrode and lead
2. Electrode connection
3. Spark gap and position
Burner
Flame
Sensing
Electrode
Electrode Position
G
1. Check supply pressure at the
gas valve:-
Minimum 17 mbar
2.
Check and correct if necessary
1. The set of the gas valve
(CO2 values - see instruction)
2. Flame sensing electrode and lead connections
3. Flame sensing electrode position
Replace sensing electrode or PCB
H
Overheat thermostat operated or
faulty
52
© Baxi Heating UK Ltd 2011
Voltage at PCB - X15
YES
connector is 24V
Check wiring - see Diagram
Viewing Window
NO
Check for and correct any
system faults
NO
Allow to cool. Continuity
across thermostat terminals
more than 1.5 ohm
NO
Check Flow & Return Sensors -
see section 'D'
19.0 Fault Finding
NO
Replace PCB
YES
Replace Igniter
Spark Ignition
Electrode
YES
Replace safety thermostat
YES
Is 110 still flashing ?
YES
Replace PCB