TROUBLESHOOTING

17

TROUBLESHOOTING

Continued

OBSERVED PROBLEM

POSSIBLE CAUSE

REMEDY

Burner does not light after ODS/pilot is lit

1.

Burner orifice is clogged

1.

Clean burner orifice (see Cleaning and

 

 

 

 

Maintenance, page 15) or replace burner

 

 

 

 

orifice

 

2.

Inlet gas pressure is too low

2.

Contact local natural or propane/LP gas

 

 

 

 

company

 

 

 

 

 

Delayed ignition of burner

1.

Manifold pressure is too low

1.

Contact local natural or propane/LP gas

 

 

 

 

company

 

2.

Burner orifice is clogged

2.

Clean burner orifice (see Cleaning and

 

 

 

 

Maintenance, page 15) or replace burner

 

 

 

 

orifice

 

 

 

 

 

Burner backfiring during combustion

1.

Burner orifice is clogged or damaged

1.

Clean burner orifice (see Cleaning and

 

 

 

 

Maintenance, page 15) or replace burner

 

 

 

 

orifice

 

2.

Burner damaged

2.

Replace burner

 

3.

Gas regulator defective

3.

Replace gas regulator

 

 

 

 

 

Burner plaque(s) does not glow (Infrared

1.

Control knob set between locked positions

1.

Turn control knob until it locks at de-

models only)

 

 

 

sired setting

 

2.

Inlet gas pressure is too low

2.

Contact local natural or propane/LP gas

 

 

 

 

company

 

3.

Plaque damaged

3.

Replace burner

 

 

 

 

 

Yellow flame during burner combustion

1.

Not enough air

1.

Check burner for dirt and debris. If

 

 

 

 

found, clean burner (see Cleaning and

 

 

 

 

Maintenance, page 15)

 

2.

Inlet gas pressure is too low

2.

Contact local natural or propane/LP gas

 

 

 

 

company

 

3.

Gas regulator defective

3.

Replace gas regulator

 

 

 

 

 

Slight smoke or odor during initial operation

1.

Residues from manufacturing processes

1.

Problem will stop after a few hours of

 

 

 

 

operation

 

 

 

 

 

Heater produces a whistling noise when

1.

Turning control knob to HIGH position

1.

Turn control knob to LOW position and

burner is lit

 

when burner is cold

 

let warm up for a minute

 

2.

Air in gas line

2.

Operate burner until air is removed from

 

 

 

 

line. Have gas checked by local natural

 

 

 

 

or propane/LP gas company

 

3.

Air passageways on heater blocked

3.

Observe minimum installation clear-

 

 

 

 

ances (see Figure 4, page 7)

 

4.

Dirty or partially clogged burner orifice

4.

Clean burner (see Cleaning and Mainte-

 

 

 

 

nance, page 15) or replace burner orifice

Heater produces a clicking/ticking noise just after burner is lit or shut off

1.Metal expanding while heating or con- tracting while cooling

1.This is common with most heaters. If noise is excessive, contact qualified ser- vice person

For more information, visit www.desatech.com

110720-01B

Page 17
Image 17
Desa VP10TA VN6D, VP10A VN10TA installation manual Maintenance

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