20

TROUBLESHOOTING

TROUBLESHOOTING

Continued

OBSERVED PROBLEM

POSSIBLE CAUSE

REMEDY

One or both burner does not light after

1.

Inlet gas pressure is too low

1.

Contact local natural or propane/LP gas

ODS/pilot is lit

 

 

 

company

 

2.

Burner orifice(s) clogged

2.

Clean burner(s) (see Cleaning and

 

 

 

 

Maintenance, page 18) or replace burner

 

 

 

 

orifice(s)

 

3.

Mislocated crossover tube

3.

Contact qualified service person

 

4.

Burner orifice(s) diameter is too small

4.

Replace burner orifice(s)

 

5.

Remote selector in OFF position (Re-

5.

Put remote selector in ON position

 

 

mote-Ready Models Only)

 

 

 

6.

Wire disconnected from gas control

6.

See Wiring Diagram, page 23

 

 

(Remote-Ready Models Only)

 

 

 

 

 

 

 

Delayed ignition of burner

1.

Manifold pressure is too low

1.

Contact local natural or propane/LP gas

 

 

 

 

company

 

2.

Burner orifice(s) clogged

2.

Clean burner(s) (see Cleaning and

 

 

 

 

Maintenance, page 18) or replace burner

 

 

 

 

orifice(s)

 

3.

Mislocated crossover tube

3.

Contact qualified service person

 

 

 

 

 

Burner backfiring during combustion

1.

Burner orifice is clogged or damaged

1.

Clean burner (see Cleaning and Main-

 

 

 

 

tenance, page 18) or replace burner

 

 

 

 

orifice

 

2.

Damaged burner

2.

Replace damaged burner

 

3.

Gas regulator defective

3.

Replace gas regulator

 

 

 

 

 

Orange flame in burner during burner

1.

Not enough air

1.

Check burner(s) for dirt and debris. If

combustion

 

 

 

found, clean burner(s) (see Cleaning and

 

 

 

 

Maintenance, page 18)

 

2.

Gas regulator defective

2.

Replace gas regulator

 

 

 

 

 

Slight smoke or odor during initial op- eration

1.Residues from manufacturing processes and logs curing

1.Problem will stop after a few hours of operation

 

1.

Turning control knob to HI position

1.

Turn control knob to LO position and let

Heater produces a whistling noise when

 

when burners are cold

 

warm up for a minute

burners are lit

2.

Air in gas line

2.

Operate burners until air is removed

 

 

 

 

from line. Have gas line checked by lo-

 

 

 

 

cal natural or propane/LP gas company

 

3.

Air passageways on heater blocked

3.

Observe minimum installation clear-

 

 

 

 

ances (see pages 7 through 10)

 

4.

Dirty or partially clogged burner

4.

Clean burners (see Cleaning and Main-

 

 

orifice(s)

 

tenance, page 18) or replace burner

 

 

 

 

orifice(s)

 

 

 

 

 

White powder residue forming within burner

1. When heated, vapors from furniture pol-

box or on adjacent walls or furniture

ish, wax, carpet cleaners, etc. turn into

 

white powder residue

1.Turn heater off when using furniture polish, wax, carpet cleaners, or similar products

Moisture/condensation noticed on win- 1. Not enough combustion/ventilation air

1. Refer to Air for Combustion and Venti-

dows

lation requirements (page 4)

For more information, visit www.desatech.com

111826-01F

Page 20
Image 20
Desa VF-18P-PDG, VF-24N-BTB installation manual Refer to Air for Combustion and Venti