h. ADC Direct Spark Ignition (DSI) Operation Flow Chart

Computer/Timer Calls For Heat

Power

Applied to the

DSI Module

DSI Module Indicator lights "RED" for up to approximately 1.3 seconds (prepurge).

DSI Module

Internal Check

DSI Module Indicator lights "GREEN", Gas Valve opens and spark bursts for approximately 8 seconds.

Open and close the Main Door...

restart the dryer.

Flame

Confirmed?

DSI Module "LOCK-OUT" Indicator lights "RED".

 

 

No

 

Yes

 

 

 

 

 

Flame

Yes

DSI Module Indicator light

 

Confirmed?

 

 

remains "GREEN".

 

 

 

Normal Heating Cycle

Established

DSI Module will immediately

 

Flame Lost

attempt to re-light burner.

 

 

 

 

3 0

 

 

Page 34
Image 34
ADC AD-410 service manual ADC Direct Spark Ignition DSI Operation Flow Chart