TROUBLESHOOTING

Continued

OBSERVED PROBLEM

POSSIBLE CAUSE

REMEDY

 

 

 

 

ODS/pilot lights but flame goes

1. Control knob not fully pressed in

1.

Press in control knob fully

out when control knob is re-

2. Control knob not pressed in

2.

After ODS/pilot lights, keep con-

leased

 

long enough

 

trol knob pressed in 30 seconds

 

3.

Safety interlock system has

3.

Wait one minute for safety in-

 

 

been triggered

 

terlock system to reset. Repeat

 

4.

Equipment shutoff valve not

 

ignition operation

 

4.

Fully open equipment shutoff

 

 

fully open

 

valve

 

5.

Pilot flame not touching ther-

5.

A) Contact local natural or

 

 

mocouple, which allows ther-

 

propane/LP gas company

 

 

mocouple to cool, causing pilot

 

 

 

 

flame to go out. This problem

 

B) Clean ODS/pilot (see

 

 

could be caused by one or both

 

Cleaning and Maintenance,

 

 

of the following:

 

page 21) or replace ODS/pilot

 

 

A) Low gas pressure

 

assembly

 

 

B) Dirty or partially clogged

 

 

 

 

ODS/pilot

 

 

 

6.

Thermocouple connection

6.

Hand tighten until snug, then

 

 

loose at control valve

 

tighten 1/4 turn more

 

7.

Thermocouple damaged

7.

Replace pilot assembly

 

8.

Control valve damaged

8.

Replace control valve

 

 

 

 

Burner does not light after ODS/

1. Inlet gas pressure is too low

1.

Contact local natural or pro-

pilot is lit

2.

Burner orifice(s) clogged

 

pane/LP gas company

 

2.

Clean burner(s) (see Cleaning

 

 

 

 

and Maintenance, page 21) or

 

3.

Burner orifice(s) diameter is

 

replace burner orifice(s)

 

3.

Replace burner orifice(s)

 

 

too small

4.

Put remote selector in ON

 

4.

Remote selector in OFF

 

 

position

 

position

 

5.

Wire disconnected from gas

5.

See Wiring Diagram, page 20

 

 

control

 

 

Delayed ignition of burner

1. Manifold pressure is too low

1.

Contact local natural or pro-

 

2.

Burner orifice(s) clogged

 

pane/LP gas company

 

2.

Clean burner(s) (see Cleaning

 

 

 

 

and Maintenance, page 21) or

 

3.

Mislocated crossover tube

 

replace burner orifice(s)

 

3.

Contact qualified service person

 

 

 

 

Burner backfiring during com-

1. Burner orifice is clogged or

1.

Clean burner (see Cleaning

bustion

 

damaged

 

and Maintenance, page 21) or

 

2.

Damaged burner

 

replace burner orifice

 

2.

Replace damaged burner

 

3.

Gas regulator defective

3.

Replace gas regulator

114744-01B

www.desatech.com

23

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Image 23
Desa SMA24VNA, SMA18VPA, SBJ24VNA, SBJ18VPA installation manual ODS/pilot lights but flame goes

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