page no. 39 of 48
LNVx Range Users, Installation & Servicing Instructions Doc Ref M104 issue 1.0 Sep 2018.
YES
NO
YES
YES
NO
NO
Is there
230V between
contractors terminals 14 and
15?
Green
lamp will be
indicating?
Continued from
previous page
Replace
Gas Valve and
Lead!
Check for break in
VIOLET & WHITE
cables.
Is
there
NOW
230V
between contractors
terminals 14
and 15?
NO
Replace
Pactrol!
YES
Is the Gas
Solenoid Valve
energised to
HIGH FIRE
?
(for only 30 seconds if input
is at low fire)?
YES
Is a
spark present and
the Ignition Electrode and
flame present during the 5
second period?
NO
• Ensure spark gap is 2.5mm
• Ensure there are no cracks on
the ceramic
• Clean electrode with wire wool
• Ensure heater has a good earth
• Check cable to Pactrol
NO
Replace
Electrode!
YES
YES
Is the
flame sensor
sending a rectification
signal back to the
controller?
• Ensure there are no cracks on
the ceramic
• Clean electrode with wire wool
• Ensure mains polarity is
correct
• Check cable to Pactrol
Has the
flame rectified
NOW?
• Check flame current by
connecting a sensitive
multi-meter capable of
measuring micro amps
• Minimum reading is 1.0μA a
normal value should
be 1.5μA or higher.
NO
YES
Is
there
NOW
a
spark present
at the ignition
Electrode?
Has the
flame rectified
NOW
?
NO
Replace
Pactrol!
NO
Is there
230V on the
BROWN
cable from
terminal 'C' of the
Fan Comand
Module?
Replace
Pactrol!
Replace Main
Fan Command
Manual!
NO
YES
Is there
230V on the
WHITE
&
PURPLE
cables to
terminal 'GV PACTROL' of
the Fan Command
Module
?
NO
Has the Gas Solenoid
Valve energised?
YES
Continued on
next page
Is
there
NOW
a
spark present
at the ignition
Electrode?