Supplied By www.heating spares.co Tel. 0161 620 6677
33
Tempra 12 / 18
Is LED1 light on?
Does sparking start
at burner?
Does burner light?
YES
Is LED2 on
after 10 seconds?
NO
YES
Go to chart 4
Reset lockout
YES
Does burner light now?
Is flame present before
lockout condition?
NO
YES
NO
Check and if necessary
replace safety thermostat
Check electrodes and
leads for damage
and correct connection
Check and if necessary
replace P.C.B.
Adjust with P4 ignition
burner pressure
Check and if necessary
clean burner
Check and if necessary
clean injectors
Check and if necessary
clean flame electrode
Check right position
of spark electrode
Check wires
Check gas supply
is live and purged
Check and if necessary
replace gas valve
NO
YES
Check and if necessary
replace P.C.B.
NO
Is LED2 on
without
the boiler sparking
YES
NO
Re-check
air pressure switch
Does burner
flame modulate?
Normal operation
carry out
YES
NO
Boiler operated
on central heating mode
Check CH sensor
and replace it if necessary
Flow diagram 5
Checking Domestic Hot Water Modulation
Flow diagram 4
Checking Ignition
