Desa VTD-24PV-JHB Observed Problem, Possible Cause, Remedy, Pilot lights but flame goes out

Models: VTD-30NV-JHB VTD-18PV-JHB VTD-18NV-JHB VTD-24NV-JHB VTD-24PV-JHB VTD-30PV-JHB

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Pilot lights but flame goes out

Troubleshooting

OBSERVED PROBLEM

POSSIBLE CAUSE

REMEDY

 

 

 

 

Pilot lights but flame goes out

1. Control knob not fully

1.

Press in control knob fully

when control knob is released

2.

pressed in

2.

After pilot lights, keep control

 

Control knob not pressed in

 

3.

long enough

3.

knob pressed in 30 seconds

 

Safety interlock system

Wait one minute for safety in-

 

 

has been triggered

 

terlock system to reset. Repeat

 

4.

Equipment shutoff valve not

4.

ignition operation

 

Fully open equipment shutoff

 

5.

fully open

5.

valve

 

Pilot flame not touching

A) Contact local natural or

 

 

thermocouple, which al-

 

propane/LP gas company

 

 

lows thermocouple to cool,

 

B) Clean pilot (see Cleaning

 

 

causing pilot flame to go

 

 

 

out. This problem could be

 

and Maintenance, page 13) or

 

 

caused by one or both of the

 

replace pilot assembly

 

 

following:

 

 

 

 

A) Low gas pressure

 

 

 

 

B) Dirty or partially clogged

 

 

 

6.

pilot

6.

Hand tighten until snug, then

 

Thermocouple connection

 

7.

loose at control valve

7.

tighten 1/4 turn more

 

Thermocouple damaged

Replace pilot assembly

 

8.

Control valve damaged

8.

Replace control valve

One or both burner does not light

1. Inlet gas pressure is too low

1.

Contact local natural or pro-

after ODS/pilot is lit

2.

Burner orifice clogged

2.

pane/LP gas company

 

Clean burner (see Cleaning

 

 

 

 

and Maintenance, page 12)

 

3.

Mislocated crossover tube

3.

or replace burner orifice

 

Contact qualified service

 

4.

Remote selector in OFF

4.

person

 

Put remote selector in ON

 

5.

position

5.

position

 

Wire disconnected from gas

See Wiring Diagram, page 17

 

 

control

 

 

 

 

 

 

Delayed ignition of burner

1. Manifold pressure is too

1.

Contact local natural or pro-

 

2.

low

2.

pane/LP gas company

 

Burner orifice clogged

Clean burner (see Cleaning

 

 

 

 

and Maintenance, page 12)

 

3.

Mislocated crossover tube

3.

or replace burner orifice

 

Contact qualified service

 

 

 

 

person

 

 

 

 

Burner backfiring during com-

1. Burner orifice is clogged or

1.

Clean burner (see Cleaning

bustion

 

damaged

 

and Maintenance, page 12)

 

2.

Damaged burner

2.

or replace burner orifice

 

Replace damaged burner

 

3.

Gas regulator defective

3.

Replace gas regulator

14

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Desa VTD-24PV-JHB, VTD-30NV-JHB, VTD-30PV-JHB Observed Problem, Possible Cause, Remedy, Pilot lights but flame goes out