Hobart DRO2GH manual Inspect Cavity Vent, Visually Inspect Electrical Connections

Inspect Cavity Vent

1.Check vent for proper operation.

A.Pull vent handle (Fig. 11) out to open vent and push handle back in to close vent.

B.Visually check that vent opens and closes when handle is moved. If vent does not open or close, contact your local authorized Hobart office for service.

Visually Inspect Electrical Connections

1.Inspect all wiring connections for discoloration. If discoloration visible, contact your local authorized Hobart office for service.

Verify Ignition Module Safety Lockout Functions

1. Start up attempt with main gas valve off. Fig. 11

A.Turn main gas valve off.

B.Close the door and turn the oven on and set control panel to call for heat.

C.Be sure convection fan is running.

D.The ignition module should start a 30 second purge cycle. Once this is accomplished, the gas valve and ignition transformer are simultaneously energized for 4 seconds for ignition trial to establish the main burner flame.

E.If no burner flame is establish during the 4 second trial for ignition, the ignition module should go into lockout and not attempt to reignite the burner. Monitor the oven for 40 seconds and verify that the module does not re-attempt ignition. If module does re-attempt ignition, contact your local authorized Hobart office for service.

2.Lost flame while burner is firing.

A.Turn the main gas valve on and turn the oven off and back on to reset the oven.

B.Close the door and set the control panel to call for heat, be sure the convection fan is running.

C.Turn the main gas valve off, the burner flame should go out.

D.The ignition module should attempt one trial for re-ignition by starting a 30 second purge cycle. Once this is accomplished, the gas valve and ignition transformer are simultaneously energized for 4 seconds for ignition trial to establish the main burner flame.

E.If no burner flame is established during the 4 second trial for ignition, the control should go into lockout and not attempt to reignite the burner. Monitor the oven for 40 seconds and verify that the module does not re-attempt ignition. If module does re-attempt ignition contact your local authorized Hobart office for service.

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