Potterton Performa 9 SL HE User Manual page 37

Ignition Lockout
Refer to the boiler wiring diagram
Is more than
17 mbar dynamic
pressure at the
gas valve
inlet ?
Yes
Are Live and
Neutral to boiler
reversed ?
No
Using meter test
dial, does gas flow
during ignition
sequence ?
Yes
Is there
a spark ?
Yes
Does flame
establish and then
extinguish ?
© Baxi Heating UK Ltd 2008
No
Incorrect gas supply
to boiler
Yes
Correct the Live and
Neutral connections
Replace gas valve
Yes
Is there 200 VDC
No
at the gas valve
during ignition
sequence ?
Yes
Is
No
spark electrode
damaged ?
Yes
Replace electrode
Yes
Is flame
Yes
detection electrode
damaged ?
Replace PCB
Yes
Check the
No
continuity of the
gas valve lead
Rectify wiring
No
Check the
Yes
continuity of the
spark generator
lead
Is the
No
electrode gap
between
3 and 4 mm ?
No
Set gap to correct position over falme strip
No
Is the
flame detection
No
gap between
3 and 4 mm ?
Lockout Burner
on off
No
Lead from PCB
to gas valve faulty
Replace spark generator
Yes
Refit
8 way connector.
No
Is there 230 V to
spark generator
when gas valve
opens ?
Yes
Replace PCB
Is wiring from
No
spark generator
to electrode OK ?
No
Rectify wiring
No
Is wiring to
Yes
the detection
electrode OK ?
Mains
on
Yes
Fig. 45
37