Market Forge Industries M36G200A-4SP manual General TROUBL-SHOOTING, Trouble Possible Cause Remedy

GENERAL TROUBL-SHOOTING

TROUBLE		POSSIBLE CAUSE		REMEDY
Pilot will not ignite or does not hold.	1.	Gas not reaching unit.	1.	Check to make sure gas is on
	2.	Main “gas cock knob” not in		and gas line is purged of air.
		ON position.	2.	Depress and turn “main gas
	3.	Air pocket or clog in gas line.		cock” to pilot position - (refer to
				lighting instructions).
	4.	Defective wiring or poor con-
			3. Purge or blow out gas line.
		nection at pilotstat power unit.
			4. Check - replace or tighten.
	5.	Defective switching across
		either the water level control or	5.	Make continuity check - replace
		pressure switches.		units that are defective.
	6.	Defective gas valve.	6.	Replace gas valve.
Water enters boiler very slowly.	1.	Clogged strainer screen on	1.	Clean or replace strainer
		water fill solenoid valve		screen. (P/N 08-4871).
	2.	Debris or lime accumulation on	2.	Clean valve seat
		seat of water fill valve.
Boiler overfills with water	1.	Probes scaled.	1.	Clean.
	2.	Water supply valve fails to	2.	Clean valve seat or replace
		close.		valve.
	3.	Defective water level control.	3.	Follow the test procedure on
				page 11. Replace if defective.
Main Burners will not ignite or will	1.	No water in boiler.	1.	Check to be sure water switch
not remain lighted.	2.	Main gas cock or supply line		is on. Check to be sure main
				water supply is on and the elec-
		not open.
				trical supply to unit is on.
	3.	Pressure switch set too low.
			2.	Open.
	4.	No voltage to gas valve.
			3. Reset - if continuity check
	5.	Gas valve defective.
				shows to be defective - replace.
			4.	Check main fuse.
			5.	Replace.
Boiler fails to build up any pressure	1.	Check to see that main gas is	1.	Turn on.
when the water is at the correct		turned on.	2. Turn to burners “on”.
level and the fuel switch is turned	2.	Check to see that gas valve is
			3. Check for voltage thru right
on.
		in burners “on” position.
				side of control board, replace if
	3.	Current flow is broken at water		defective.
		level control (ascertain with	4. Re-adjust to proper setting -
		continuity check).
				refer to instruction for re-adjust-
	4.	Current flow is broken at pres-		ment, replace if defective.
		sure control or high limit control
		switches (ascertain with conti-
		nuity check).
Water level in gauge glass	1.	Top shutoff valve on water	1.	Open.
fluctuates up and down.		gauge glass is closed.

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