Stovax 8564 - Manual (Page 19)

19
PILOT WILL NOT STAY LIT OR FIRE GOES OUT IN USE
Ensure there is no debris around the pilot assembly,
e.g. coal, soot etc. which could short the spark, clean the area.
Problem is with the
pipework or
fittings which lead
to the fire. Correct and
retry.
Is thermocouple connection good in back of valve?
Replace oxypilot.
Will pilot
stay alight?
Change mag
unit.
Is the pilot flame of the
correct length? See diagram 1, Servicing
Requirements
Change the
pilot unit.
Will pilot
stay lit?
With the pilot
running is the gas
pressure stated on the
databadge?
With the fire running
on full is the gas at the pressure stated on the databadge?
Run for no more than
60 seconds
turn off, time interval
until mag unit shuts with a click. Is this
greater than 7
seconds?
Run for a maximum of
60 seconds, turn off,
time interval until mag unit shuts with a click.
Is this greater than 7
seconds?
Tighten the
connection and retry.
No
No No
No
No
No
Yes
SYSTEM OK
Yes
Yes
Yes
Yes
No
Yes
Yes No
Light the pilot and keep the control knob pushed in
at least 10 seconds before letting go.
FLAME FAILURE FUNCTIONAL CHECK
SERVICING INSTRUCTIONS
FAULT FINDING CHARTS
IGNITION FUNCTIONAL CHECK 2
NO SPARK
Ensure there is no debris around the pilot assembly,
(e.g. coal, soot etc.) which could short the spark, clean the area.
Consult Section 2 on page 4, retry.
Operate the valve to light the pilot, does the valve
'click'?
Is the pIlot burner
horizontal?
See diagram 1, Servicing
Requirements
Has ignition lead
become detached or is
connection poor? Remove the electrode lead
from electrode with insulated
pliers. Hold the tip 4mm from the
pilot pipework, is there a spark
when the valve ‘clicks’?
Is the electrode wire
detached from the piezo
in the valve? Replace the
lead and, retry.
Correct and retry.
Check for defective or
damaged control knob spindle
or cam operation. Check for
correct location of piezo
components. Correct and retry.
Remove the electrode lead from
the piezo. Operate the valve. Does a spark jump from the
piezo to the valve body?
Is the valve being
operated correctly?
Reset the pilot burner.
Yes
Yes Yes No No No
Yes
Yes
Yes
No
No
Replace the electrode.
Replace the electrode
lead and retry.
Replace the piezo
and gas valve and retry.
Yes
No