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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:-
Natural Gas - Minimum 17 mbar
Propane - Minimum 37 mbar
2.
Check and correct if necessary
1. The set of the gas valve
(CO
values - see instruction)
2
2. Flame sensing electrode and lead connections
3. Flame sensing electrode position
Replace sensing electrode or PCB
H
Safety Thermostat operated or
faulty
50
© Baxi Heating UK Ltd 2017
YES
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'
17.0 Fault Finding
NO
Replace PCB
Spark Ignition
Electrode
YES
Replace safety thermostat
YES
Is
110 still flashing ?
YES
Replace PCB
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