Stovax 8517-P8517 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?
	See diagram 1, Servicing		Reset the pilot burner.
	Requirements
	Yes
	Has ignition lead	Yes
	become detached or is		Correct and retry.
	connection poor?
	No
	Remove the electrode lead		Check for defective or
Yes			damaged control knob spindle
	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		Yes
	detached from the piezo			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	Will pilot	Yes
With the 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?
		Problem is with the		on the databadge?
		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

in back of valve?

Requirements

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