TROUBLESHOOTING

Continued

 

OBSERVED PROBLEM POSSIBLE CAUSE

REMEDY

ODS/pilot lights but flame goes out when control knob is re- leased

1.Control knob not fully pressed in

2.Control knob not pressed in long enough

3.Equipment shutoff valve not fully open

4.Pilot flame not touching ther- mocouple, which allows ther- mocouple to cool, causing pi- lot flame to go out. This prob- lem could be caused by one or both of the following:

A)Low gas pressure

B)Dirty or partially clogged ODS/pilot

5.Thermocouple connection loose at control valve

6.Thermocouple damaged

7.Control valve damaged

1.Press in control knob fully

2.After ODS/pilot lights, keep con- trol knob pressed in 30 seconds

3.Fully open equipment shutoff valve

4.A) Contact local natural or propane/LP gas company

B)Clean ODS/pilot (see Cleaning and Maintenance, page 23) or replace ODS/pi- lot assembly

5.Hand tighten until snug, then tighten 1/4 turn more

6.Replace pilot assembly

7.Replace control valve

Burner does not light after ODS/ pilot is lit

1.Burner orifice clogged

2.Inlet gas pressure is too low

3.Thermopile leads disconnected or improperly connected

4.Burners will not come on in remote position

1.Clean burner (see Cleaning and Maintenance, page 23) or replace burner orifice

2.Contact local natural gas com- pany

3.Reconnect leads (see Wiring Diagrams, page 24)

4.Replace battery in transmitter and receiver

Delayed ignition burner

1.

Manifold pressure is too low

 

2.

Burner orifice clogged

1.Contact local natural or pro- pane/LP gas company

2.Clean burner (see Cleaning and Maintenance, page 23) or replace burner orifice

Burner backfiring during com- bustion

1.Burner orifice is clogged or damaged

2.Damaged burner

3.Gas regulator defective

1.Clean burner (see Cleaning and Maintenance, page 23) or replace burner orifice

2.Replace damaged burner

3.Replace gas control

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Desa VI33PRB, VI33NRB installation manual Observed Problem Possible Cause Remedy

VI33NRB, VI33PRB specifications

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