TROUBLESHOOTING

Continued

OBSERVED PROBLEM

POSSIBLE CAUSE

REMEDY

 

 

 

 

 

Pilot lights but flame goes out

1. Gas control knob not fully

1.

Press in gas control knob

when control knob is released

2.

pressed in

2.

fully

 

Gas control knob not pressed

After pilot lights, keep gas

 

 

in long enough

 

control knob pressed in 30

 

3.

Equipment shutoff valve not

3.

seconds

 

Fully open equipment shutoff

 

4.

fully open

4.

valve

 

Pilot flame not touching

A) Contact local natural or

 

 

thermocouple, which allows

 

propane/LP gas company

 

 

thermocouple to cool, caus-

 

B) Clean pilot (see Cleaning

 

 

ing pilot flame to go out. This

 

and Maintenance, page 31)

 

 

problem could be caused by

 

or replace pilot assembly

 

 

one or both of the following:

 

 

 

 

 

A) Low gas pressure

 

 

 

 

 

B) Dirty or partially clogged

 

 

 

 

5.

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 not light after pilot

1. Burner orifice clogged

1.

Clean burner (see Cleaning

is lit

 

 

 

and Maintenance, page 31) or

 

2.

Inlet gas pressure is too low

2.

replace burner orifice

 

Contact local propane/LP or

 

3.

Thermopile leads disconnect-

3.

natural gas company

 

Reconnect leads to TP &

 

 

ed or improperly connected

 

TPTH terminals on control

 

4.

Thermopile is defective

4.

valve

 

Replace thermopile

 

 

 

 

 

Delayed ignition burner

1. Manifold pressure is too low

1.

Contact local propane/LP or

 

2.

Burner porting or orifice

2.

natural gas company

 

Clean burner (see Cleaning

 

 

clogged

 

and Maintenance, page 31) or

 

 

 

 

replace burner orifice

 

 

 

 

 

Burner backfiring during com-

1. Burner orifice is clogged or

1.

Clean burner (see Cleaning

bustion

 

damaged

 

and Maintenance, page 31) or

 

2.

Damaged burner

2.

replace burner orifice

 

Replace damaged burner

 

3.

Gas regulator defective

3.

Replace gas control

 

 

 

 

 

Slight smoke or odor during initial

1. Residues from manufacturing

1.

Problem will stop after a few

operation

 

processes and logs curing

 

hours of operation

34

www.desatech.com

116236-01E

Page 34
Image 34
Desa (V)VC42P, CGCDV42PR After pilot lights, keep gas, Long enough Control knob pressed, Seconds, Low gas pressure, Pilot

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