Wayne P250AF-DI, P265 Service Hint, Diagnosis And Corrective Measures, What’S Wrong, What To Do

To measure flame current, first shut off the power to the system and then remove the flame sensing lead wire form the electrode terminal and insert a 0-50 DC microamp meter in series with the sensor electrode and the sensor lead wire. “Plus” terminal of meter to component board and “negative”: terminal to sense electrode. Energize the ignitor. If the meter reads below zero, shut the system off and reverse meter leads.

Once the flame is established, assure that the flame current is above the minimum specified. If not, assure that the system has the proper input voltage, and ten relocate the sensor electrode in the flame pattern until flame current is increased.

Once the flame has been established and the system is in its heat cycle, occasional sparking may occur. This is common in some installations and is not significant. Sparking will not damage the ignitor.

7.Ambient Temperatures

The 05-16 is designed to operate over the temperature range of -40 to 150 F (-40 to 65.56 C). Care should be taken to insure that it operates within this range. If these limits are exceeded, the ignitor should be relocated to an area that is within this temperature range.

8.Relative Humidity

The 05-16 is coated for moisture resistance to 90 percent relative humidity. Caution should be taken to protect the component board against direct exposure to water.

		SERVICE HINT, DIAGNOSIS AND CORRECTIVE MEASURES
WHAT’S WRONG		WHY		WHAT TO DO
1.	Lockout Occurs 3-10	1.	Reverse polarity.	Para. 1.
	seconds after ignition.	2.	System improperly grounded	Para. 2.
		3.	Gas pressure too high, causing	Check to ensure input pressure
			flame to lift off burner.	as specified on manufacturer’s
				data plate.
		4.	Sensor probe incorrectly	Para. 6.
			positioned in flame pattern.
2.	Flame not established.		Spark gap too small.	Para. 3a
	Arching to ground.		Spark too large.	Para. 3a.
3.	No spark.		Corroded connector.	Para. 3b.
4.	Arching other than across gap.	1.	Cracked or dirty insulator.	Para. 3c.
		2.	Broken high voltage lead.	Para. 3c.
	Weak Spark.		High voltage lead too close to	Para. 3e.
			metal surface.
No flame.			Valve malfunction.	Para. 4.
Low flame current and/or			Electrode improperly placed.	Para. 5.
nuisance lockouts.
Nuisance lockouts.		1.	Flame current falls below 2.5 uA	Para. 6.
		2.	Low gas pressure.	Check to ensure that manifold
				pressure meets manufacturer’s
				specifications.
	WIRING DIAGRAM			WIRING DIAGRAM
	HONEYWELL S87KDI SYSTEM			LADDER FORM

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