DV Power Vent System

Troubleshooting the Power Vent System

SIT 822 Valve with Honeywell Electronic Ignitor and Synetek Power Vent Board

Service must be performed by a qualified installer, service agency or your gas supplier.

BEFORE COMMENCING TO TROUBLE SHOOT THE UNIT:

1.Check if there is power to the unit (fireplace) and to the power vent box.

2.Check if there is gas to the unit (fireplace).

3.The ignition control in the fireplace is equipped with a lockout device which will put the unit into a lockout condition after three attempts to ignite the pilot. Follow the steps in the chart below to reset the control: Turn the On/Off switch to the off position, or turn the thermostat to the off position.

Wait 10 seconds and then turn to the “on” position.

4.If this is the first time that the unit has been fired, check the wiring of the unit against the wiring diagram before commencing troubleshooting.

START

Power vent motor is working?

YES

NO

ON/OFF switch or wall thermostat “ON”?

Is there 120V power to the fireplace and power vent?

Are all wiring connections tight? (Turn off Power before checking)

 

YES

YES

 

 

 

 

 

Is there 120V Power to the motor?

Is there 24V at the power vent circuit

 

 

 

 

board at the 24VAC Hot Terminal?

 

 

 

NO

 

 

 

 

 

 

YES

Replace Blower

NO

Is there 24V from the transformer?

YES

Replace Power Vent Circuit Board

Does the Pilot

Spark?

YES

Pilot Burner

Lights?

YES

NO

NO

NO

Replace Transformer

Is there 24V power at terminal

 

NO

six (24V) at the ignition board?

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

Is the lead to the spark electrode

 

 

attached or arcing to ground?

 

 

Is the electrode cracked?

 

 

 

 

 

 

 

 

NO

 

 

 

 

 

 

Replace Ignition Module

 

 

 

 

 

 

 

YES

 

 

 

Is there 24V power at terminal

 

3 (PV) during spark cycle?

 

 

 

 

 

 

 

NO

 

 

 

 

 

 

Replace Ignition Module

 

 

 

 

 

 

 

 

Check Wiring

 

 

 

 

NO

 

 

 

 

Is the Pressure

 

Is there a blockage in the vent?

 

 

 

 

 

 

 

 

 

 

 

 

 

Switch Closed?

 

 

Is there water/dirt in the hose from

NO

Replace

 

 

YES

 

 

blower to the pressure switch?

Pressure

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Are hose connections loose?

 

Switch

 

Replace Power

 

 

 

 

 

Is the hose cracked?

 

 

 

 

 

 

 

Vent Circuit Board

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Is pilot gas line blocked?

NO

 

Is pilot orifice blocked?

 

Replace Gas Valve

Are wires to valve loose

 

 

 

or corroded?

 

 

 

 

 

Does Spark

Stop When

Pilot Lights?

YES

Does Main Burner Light?

YES

NO

NO

Does pilot flame cover

 

YES

 

 

 

 

 

 

 

 

 

 

 

the flame rod?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NO

 

 

 

 

 

 

 

 

 

 

 

 

Check Pilot for obstruction

 

 

 

Check Gas Pressure

 

 

 

 

 

Adjust Pilot Flame

 

 

 

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

Is there 24V power at terminal

 

 

 

1 (MV) during spark cycle?

 

 

 

 

 

 

 

 

 

 

 

 

 

NO

 

 

 

 

 

 

 

 

 

 

 

 

Replace Ignition Module

 

 

 

 

 

 

 

 

 

 

 

 

 

Is flame rod corroded?

 

 

NO

 

 

 

 

 

Is pilot hood corroded?

 

 

Replace Ignition Module

 

 

 

 

 

Is flame rod insulator cracked?

 

 

 

 

 

 

 

 

Is wire to flame rod damaged?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check

Are wires to valve

 

NO

Is there manifold pressure?

YES

position

 

 

 

 

 

 

 

 

 

of pilot.

loose or corroded?

 

 

 

 

 

NO

 

 

 

 

 

Is orifice

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace Gas Valve

 

blocked?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

System Runs

 

Is the correct size of orifice restrictor installed in the power vent?

 

 

 

 

 

 

Continuously

NO

Does the pilot flame covers the flame rod?

 

 

 

 

 

Is vent partially blocked?

 

 

 

Until Switched

 

Is the flame rod wire in good condition?

 

 

 

 

 

Is there water/dirt in hose to

NO

 

Replace

 

Off?

 

Is there continuity to ground from the pilot burner?

 

 

 

 

pressure switch?

 

Pressure

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

Are hose connections loose?

 

 

Switch

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Is the hose cracked?

 

 

 

 

 

 

Does pressure switch open during operation?

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NO

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace power vent circuit board

 

 

 

Does 24V power get interupted at terminal six (24V) at the ignition module?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NO

WARNING: Never jump the pressure switch out of this

 

 

 

 

 

 

 

 

 

Replace ignition module

 

 

 

 

 

system. Property damage, injury or death may result.

 

 

 

 

 

 

 

 

 

 

 

 

18

 

 

 

 

 

 

 

 

 

 

 

 

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Vermont Casting 7PDVS manual Troubleshooting the Power Vent System
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