Desa SVYD18NRA, SVYD18PRA Troubleshooting, Observed Problem Possible Cause Remedy

Models: SVYD18PRA SVYD18NRA

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TROUBLESHOOTING

WARNING: Turn off heater and let cool before servicing. Only a qualified service person should service and repair heater.

CAUTION: Never use a wire, needle, or similar object to clean ODS/pilot. This can damage ODS/pilot unit.

Note: All troubleshooting items are listed in order of operation.

OBSERVED PROBLEM

POSSIBLE CAUSE

REMEDY

When ignitor button is pressed,

1. Ignitor electrode not con-

1.

Reconnect ignitor cable

there is no spark at ODS/pilot

 

nected to ignitor cable

 

 

 

2.

Ignitor cable pinched or wet

2.

Free ignitor cable if pinched

 

 

 

 

by any metal or tubing. Keep

 

 

 

 

ignitor cable dry

 

3.

Broken ignitor cable

3.

Replace ignitor cable

 

4.

Bad piezo ignitor

4.

Replace piezo ignitor

 

5.

Ignitor electrode broken

5.

Replace pilot assembly

 

6.

Ignitor electrode positioned

6.

Replace pilot assembly

 

 

wrong

 

 

 

 

 

 

 

When ignitor button is pressed, there is spark at ODS/pilot but no ignition

1.Gas supply turned off or equip- ment shutoff valve closed

2.Control knob not in PILOT position

3.Control knob not pressed in while in PILOT position

4.Air in gas lines when installed

5.ODS/pilot is clogged

6.Gas regulator setting is not correct

7.Depleted gas supply (propane/ LP only)

1.Turn on gas supply or open equipment shutoff valve

2.Turn control knob to PILOT position

3.Press in control knob while in PILOT position

4.Continue holding down con- trol knob. Repeat igniting op- eration until air is removed

5.Clean ODS/pilot (see Cleaning and Maintenance, page 18) or replace ODS/pilot assembly

6.Replace gas control

7.Contact local propane/LP gas company

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.

Equipment shutoff valve not

3.

Fully open equipment shutoff

 

 

fully open

 

valve

 

4.

Pilot flame not touching ther-

4.

A) Contact local propane/LP

 

 

mocouple, which allows ther-

 

or natural gas company

 

 

mocouple to cool, causing pi-

 

 

 

 

lot flame to go out. This prob-

 

B) Clean ODS/pilot (see

 

 

lem could be caused by one or

 

Cleaning and Maintenance,

 

 

both of the following:

 

page 18) or replace ODS/pi-

 

 

A) Low gas pressure

 

lot assembly

 

 

B) Dirty or partially clogged

 

 

 

 

ODS/pilot

 

 

 

5.

Thermocouple connection

5.

Hand tighten until snug, then

 

 

loose at control valve

 

tighten 1/4 turn more

 

6.

Thermocouple damaged

6.

Replace pilot assembly

 

7.

Control valve damaged

7.

Replace control valve

 

 

 

 

 

113084-01C

www.desatech.com

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Desa SVYD18NRA, SVYD18PRA installation manual Troubleshooting, Observed Problem Possible Cause Remedy