Monessen Hearth PF troubleshooting, electronic Ignition, Designer Series Gas Fireplaces, persists

Models: CL)NVC/PVC PF 624DV(ST CR

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troubleshooting

Designer Series Gas Fireplaces

troubleshooting

electronic Ignition

START

1.Turn gas supply off.

2.Turn ON/OFF switch to “ON” Power to module (24V Normal)

YES

Is there a spark across ignitor sensor gap?

YES

Turn on gas.

Does pilot burner light?

YES

Does spark stop when pilot is lit?

YES

Does main burner light?

YES

Does system run until ON/OFF switch is in “OFF” position?

YES

END OF TROUBLESHOOTING

 

 

 

Check: Line voltage (120VAC)

 

 

 

NO

Low voltage transformer (19.5 minimum VAC)

ON/OFF switch

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Wiring connections

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Unplug ignition lead and

 

 

 

 

NO

check spark at module

 

 

 

 

(24VAC normal).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Is spark OK?

 

NO

 

Replace module

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

yES

 

 

 

 

 

 

 

 

 

 

 

 

 

A.Check ignition cable ground wiring, ceramic insulator and gap. Correct if necessary.

B.Does ignition cable show signs of melting or buckling? Take protective action to shield cable and boot from excessive temperatures.

 

A. Are all manual gas valves open?

NO

Are supply tubing and pressure good?

Are pilot burner orifices blocked?

 

B.Check electrical connections between module and pilot operator on gas control.

C.Check for 24VAC across PV-MVPV terminals. If voltage is correct, replace gas control.

If voltage is not correct, replace module.

 

 

NOTE: If module goes into lockout, reset system.

NO

A. Check continuity of ignition cable and ground wire.

B. Clean flame rod.

 

 

 

 

C. Check electrical connections between flame rod and

 

 

module.

 

 

D. Is ceramic flame rod insulator cracked?

 

 

E. Is pilot flame a steady blue? Does flame cover flame rod?

 

 

If not, adjust pilot flame. Replace module if problem

 

 

persists.

 

 

 

A.Check for 24VAC across MV-MVPV terminal. Replace module if there is no voltage.

NO

B. Are electrical connections between module and gas

control good?

 

 

If connections are good, replace gas control or gas

 

control operator.

 

NOTE: If module goes into lockout, reset system.

 

 

A. Check continuity of ignition cable and ground wire.

NO

NOTE: If ground is poor or erratic, shutdown may

occasionally occur even though operation is normal

 

 

at time of checkout.

 

B.Is pilot flame a steady blue? Does flame cover flame rod? If above checks out, replace module.

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42D0200

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Monessen Hearth PF, CR troubleshooting, electronic Ignition, Designer Series Gas Fireplaces, persists, control operator