Baxi Combi Instant 80e Installation & Servicing Instructions Manual page 43

Central Heating - Follow operational sequence
Turn selector to
neon illuminated.
YES
Turn Central Heating
thermostat to maximum.
neon illuminated.
YES
Primary water is diverted from
preheating circuit to CH
system.
neon illuminated.
YES
Pump runs.
YES
Primary flow switch operated.
YES
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
Preheating function starts after
25 seconds.
neon flashing
(see DHW preheating
function).
YES
Primary water is diverted from
preheating circuit to CH
system.
neon illuminated
YES
Go to next page
NO
Go to section 'A'.
External controls calling for
NO
heat and where fitted, internal
clock calling for heat.
NO
Go to section 'M'.
NO
neon flashing
Go to section 'B'.
NO
neon flashing
Go to section 'C'.
NO
neon flashing
NO
neon flashing
Go to section 'E'.
NO
neon flashing
NO
Go to section 'F'.
neon flashing
Go to section 'I'
NO
Preheat control is not at
minimum position. External
control calling for heat.
NO
Go to section 'M'.
14.0
Ensure controls are set to
NO
demand and verify the contacts
are closed.
YES
neon flashing
Go to section 'B'.
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.
Go to section 'L'.
Fault Finding
Go to section 'J'.
Turn selector to the reset
position. If the neon does not
extinguish go to sections H and
K.
43