Stovax 8568, 8564 Fault Finding Charts, Ignition Functional Check, Flame Failure Functional Check

19

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	No	Is the valve being	Yes
	the pilot, does the valve
			operated correctly?
	'click'?
	Yes
	Is the pIlot burner	No
	horizontal?		Reset the pilot burner.
	See diagram 1, Servicing
	Requirements
	Yes
	Has ignition lead	Yes
	become detached or is		Correct and retry.
	connection poor?
	No
	Remove the electrode lead		Check for defective or
			damaged control knob spindle
Yes	from electrode with insulated		or cam operation. Check for
	pliers. Hold the tip 4mm from the		correct location of piezo
	pilot pipework, is there a spark		components. Correct and retry.
	when the valve ‘clicks’?

		No
				Remove the electrode lead from
	Is the electrode wire
	detached from the piezo		Yes	the piezo. Operate the valve.
	in the valve?				Does a spark jump from the
					piezo to the valve body?
		No
	Replace the				Yes		No
	lead and, retry.
Replace the electrode.			Replace the electrode			Replace the piezo
			lead and retry.			and gas valve and retry.

FLAME FAILURE FUNCTIONAL CHECK

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.

Light the pilot and keep the control knob pushed in
	at least 10 seconds before letting go.
	No	Yes
With the pilot	Will pilot
	stay lit?		With the fire running
running is the gas
			on full is the gas at
pressure stated on the
	No	No	the pressure stated
databadge?
			on the databadge?
	Problem is with the
	pipework or
	fittings which lead		Yes
	to the fire. Correct and
	retry.

Yes

Run for no more than

Yes

60 seconds

turn off, time interval

until mag unit shuts

No

with a click. Is this

Is the pilot flame of the

Is thermocouple

greater than 7

correct length? See

seconds?

diagram 1, Servicing

connection good

Requirements

in back of valve?

No

Yes

Tighten the

connection and retry.

No

Replace

oxypilot.

Yes

Run for a maximum of

Will pilot

60 seconds, turn off,

Change the

stay alight?

time interval until mag

pilot unit.

unit shuts with a click.

No

No

Is this greater than 7

seconds?

Change mag

unit.

Yes

SYSTEM OK

FAULT FINDING CHARTS SERVICING INSTRUCTIONS