Baxi Combi Instant 80 HE Installation & Servicing Instructions Manual page 45

Central Heating - Follow operational sequence (Continued)
Continued from
previous page
Does the burner remain lit ?
NO
CH temperature higher than
set point of CH thermostat
control. When CH
temperature decreases cycle
continues.
Fan runs at max speed.
YES
Air pressure switch proved.
YES
Spark at ignition electrodes for
up to 10 seconds.
YES
neon illuminated
YES
Burner extinguishes after 10
seconds.
NO
Burner output modulates until
set temperature is reached.
YES
Burner goes out.
NO
neon flashing.
NO
neon flashing
Go to section 'E'.
NO
neon flashing.
NO
Go to section 'F'.
neon flashing
Go to section 'I' & 'N'.
NO
Go to section 'G'.
YES
Fan stops.
14.0
Turn the selector to reset.
If regular resetting is required
YES
or appliance still does not
operate investigation is
necessary.
NO
neons flashing
Go to section 'D'.
YES
NO
Change main PCB.
Pump continues to run for
YES
3 minutes.
(room thermostat open)
Fault Finding
Go to section 'J' & 'O'.
Turn selector to the reset
position. If the neon does not
extinguish go to sections H and
YES
Operation sequence
correct
K.
45