TROUBLESHOOTING

Continued

OBSERVED PROBLEM

POSSIBLE CAUSE

REMEDY

 

 

 

 

 

ODS/pilot lights but flame

1. Control knob not fully

1.

Press in control knob fully

goes out when control knob is

 

pressed in

2.

After ODS/pilot lights, keep con-

released

2. Control knob not pressed in

 

3.

long enough

3.

trol knob pressed in 30 seconds

 

Safety interlock system has

Wait one minute for safety in-

 

 

been triggered

 

terlock system to reset. Repeat

 

4.

Equipment shutoff valve not

4.

ignition operation

 

Fully open equipment shutoff

 

5.

fully open

5.

valve

 

Thermocouple connection

Hand tighten until snug, then

 

6.

loose at control valve

6.

tighten 1/4 turn more

 

Pilot flame not touching

A) Contact local natural or

 

 

thermocouple, which allows

 

propane/LP gas company

 

 

thermocouple to cool, caus-

 

B) Clean ODS/pilot (see

 

 

ing pilot flame to go out. This

 

 

 

problem could be caused by

 

Cleaning and Maintenance,

 

 

one or both of the following:

 

page 16) or replace ODS/pilot

 

 

A) Low gas pressure

 

assembly

 

 

B) Dirty or partially clogged

 

 

 

 

7.

ODS/pilot

7.

Replace pilot assembly

 

Thermocouple damaged

 

8.

Control valve damaged

8.

Replace control valve

 

 

 

 

 

Burner does not light after ODS/

1. Burner orifice is clogged

1.

Clean burner (see Cleaning

pilot is lit

 

 

 

and Maintenance, page 16) or

 

2.

Inlet gas pressure is too low

2.

replace burner orifice

 

Contact local natural or pro-

 

 

 

 

pane/LP gas company

 

 

 

 

 

Delayed ignition of burner

1. Manifold pressure is too

1.

Contact local natural or pro-

 

2.

low

2.

pane/LP gas company

 

Burner orifice is clogged

Clean burner (see Cleaning

 

 

 

 

and Maintenance, page 16) or

 

 

 

 

replace burner orifice

 

 

 

 

 

Burner backfiring during

1. Burner orifice is clogged or

1.

Clean burner (see Cleaning

combustion

 

damaged

 

and Maintenance, page 16) or

 

2.

Burner damaged

2.

replace burner orifice

 

Replace burner

 

3.

Gas regulator defective

3.

Replace gas regulator

18

www.desatech.com

113061-01F

Page 18
Image 18
Desa VP20BTA, VP30BTA, VN30BTA, VN20BTA installation manual Troubleshooting

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