ADC AD-410 service manual Second Visual Check

e. Troubleshooting Flow Chart - Quick Reference...

			Second Visual Check
			(Does Main Burner Ignite?)
	Does		Is manual
			knob on the Gas Valve
main burner
		No
			in the "ON"
	light?
			position?
	Yes			Yes

Turn knob to "ON/OPEN" position.

No Energize system and check for proper operation.

Go To

Third Visual

Check

Restore gas supply. Energize system and

check for proper operation.

No

Is

dryer Internal Gas Shut-Off Valve and

ALL External Gas Shut-Off

Valves in the open

position?

Yes

Turn manual knob on the Gas Valve to the "OFF" position.

Connect a manometer to the Gas Valve outlet pressure tap.

No

Correct supply pressure. Energize system and check for proper operation .

No

Is

gas available

at the

source?

Yes

Energize

system. Is 24 VAC present across leads at the Gas

Valve?

	Turn
	manual knob on
	the Gas Valve to the
	"ON" position.	Yes
No
	Energize the system.
	Is outlet pressure
	detected?

		With
	system energized,
	is 24 VAC present
No
	across the "MV" and "GND"
	terminals of the DSI
	Module?
			No
		Yes

Is outlet Water

Column (W.C.) pressure

correct?

Natural 3.5" - 4.0" W.C. L.P. 10.5" - 11.0" W.C .

Yes

Check Spark Electrode for proper gap and insure that the spark is in the path of the gas flow...

Refer To Service Section.

Yes

Replace the Gas Valve. Energize the system and check for proper operation.

	Replace High	Replace
	Voltage (HV)	DSI Module
	leads
Energize system
	and check for
proper operation.

Make the necessary corrections. Energize system and check for proper operation.

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