Servicing instructions, Fault finding charts – Stovax Logic Hotbox & Convector Fire User Manual
Page 19
SERVICING INSTRUCTIONS
FAULT FINDING CHARTS
19
IGNITION FUNCTIONAL CHECK 1
PIL
O
T
WILL NO
T LIGHT
Ensure there is no debris around the pilot assembly
, e.g
. coal, soot, etc
which could short the spark, clean the area. Check for fluff in the pilot
aeration hole. See diagram 7.
There is a blokage in the system, check the inlet test point, the mag
seating
, valve and pilot filter
Operate the valve.
Is there a spark?
Does the pilot light?
Is the control being
operated correctly?
W
ill the pilot light
with a match?
Is the gas turned on to
the appliance?
Is the gas pressure
correct?
Has the system got
any air in it?
SYSTEM O
.K
Consult users book
and retry
Check isolation tap
and gas meter
, retry
.
Correct and retry
.
P
urge the gas pipes
and retry
See “No Spark
”
Chart *
Ensure gap between the
electrode and thermocouple
is as Dia. 8 and retry
.
If gap is O
.K then first
change the ignition lead and
retry
.
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
IGNITION FUNCTIONAL CHECK 2
NO SP
ARK
Ensure there is no debris around the pilot assembly
, e.g
. coal, soot, etc
which could short the spark, clean the area.
Consult users
instructions, retry
Is the valve being
operated correctly?
Reset the pilot
burner
Correct and retry
Check for defective or
damaged control knob
spindle or cam operation.
Check for the 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?
Operate the valve to
light the pilot, does the
valve ‘click
’?
Has ignition lead become
detached or is connection
poor?
Remove the electrode lead
from electrode with
insulated pliers hold the tip
3.5mm from the pilot
pipework,is there a spark
when the valve ‘clicks’?
Is the electrode wire
detached from the piezo
valve?
Replace the ODA unit
Replace the electrode
lead and retry
Replace the
control valve
Is the gap between electrode
and thermocouple
as in Dia 7?
NO
NO
NO
YES
YES
YES
NO
YES
YES
YES
*