Troubleshooting

Continued

OBSERVED PROBLEM

POSSIBLE CAUSE

REMEDY

 

 

 

 

 

ODS/pilot lights but flame

1. Control knob not fully pressed

1.

Press in control knob fully

goes out when control knob is

 

in

2.

After ODS/pilot lights, keep

released

2. Control knob not pressed in

 

control knob pressed in 30

 

3.

long enough

3.

seconds

 

Equipment shutoff valve not

Fully open equipment shutoff

 

4.

fully open

4.

valve

 

Pilot flame not touching ther-

A) Contact local natural or

 

 

mocouple, which allows ther-

 

propane/LP gas company

 

 

mocouple to cool, causing

 

B) Clean ODS/pilot (see

 

 

pilot flame to go out. This

 

Cleaning and Maintenance,

 

 

problem could be caused by

 

page 23) or replace ODS/pilot

 

 

one or both of the following:

 

assembly

 

 

A) Low gas pressure

 

 

 

 

 

B) Dirty or partially clogged

 

 

 

 

5.

ODS/pilot

5.

Hand tighten until snug, then

 

Thermocouple connection

 

6.

loose at control valve

6.

tighten 1/4 turn more

 

Thermocouple damaged

Replace pilot assembly

 

7.

Control valve damaged

7.

Replace control valve

 

 

 

 

 

Burner does light after ODS/

1. Burner orifice clogged

1.

Clean burner (see Cleaning

pilot is lit

 

 

 

and Maintenance, page 23)

 

2.

Inlet gas pressure is too low

2.

or replace burner orifice

 

Contact local natural or pro-

 

3.

Thermopile leads disconnect-

3.

pane/LP gas company

 

Reconnect leads (see Wiring

 

 

ed or improperly connected

 

Diagram, page 32)

 

4.

Burners will not come on in

4.

Replace battery in transmitter

 

 

remote position

 

and receiver

 

 

 

 

 

Delayed ignition burner

1. Manifold pressure is too low

1.

Contact local natural or pro-

 

2.

Burner orifice clogged

2.

pane/LP gas company

 

Clean burner (see Cleaning

 

 

 

 

and Maintenance, page 23)

 

 

 

 

or replace burner orifice

 

 

 

 

 

Burner backfiring during com-

1. Burner orifice is clogged or

1.

Clean burner (see Cleaning

bustion

 

damaged

 

and Maintenance, page 23)

 

2.

Damaged burner

2.

or replace burner orifice

 

Replace damaged burner

 

3.

Gas regulator defective

3.

Replace gas control

111161-01H

www.desatech.com

25

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Desa CHL3924NR installation manual Maintenance

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