Desa VF-18N-MHd, VF-18P-MHd Troubleshooting, Observed Problem Possible Cause Remedy

Page 21

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

and

are pressed at

1. Switch in OFF position (mod-

1.

Push switch on valve to "–"

the same time, there is no spark

 

ule gives long steady beep)

2.

position

at ODS/pilot

 

2. Ignitor electrode not con-

Reconnect ignitor cable

 

 

 

3.

nected to ignitor cable

3.

Free ignitor cable if pinched

 

 

 

Ignitor cable pinched or wet

 

 

 

 

 

 

by any metal or tubing. Keep

 

 

 

4.

Broken ignitor cable

4.

ignitor cable dry

 

 

 

Replace ignitor cable

 

 

 

5.

Bad piezo ignitor

5.

Replace piezo ignitor

 

 

 

6.

Ignitor electrode positioned

6.

Replace pilot assembly

 

 

 

7.

wrong or broken

7.

Replace module

 

 

 

Bad module

 

 

 

 

 

 

 

When

and

are pressed,

1. Gas supply turned off or equip-

1.

Turn on gas supply or open

there is spark at ODS/pilot but

 

ment shutoff valve closed

2.

equipment shutoff valve

no ignition

 

 

2. Control knob not in PILOT

Turn control knob to PILOT

 

 

 

3.

position

3.

position

 

 

 

Control knob not pressed in

Press in control knob while in

 

 

 

4.

while in PILOT position

4.

PILOT position

 

 

 

Air in gas lines when in-

Continue holding down con-

 

 

 

 

stalled

 

trol knob. Repeat igniting op-

 

 

 

5.

Depleted gas supply (pro-

5.

eration until air is removed

 

 

 

Contact local propane/LP gas

 

 

 

6.

pane/LP only)

6.

company

 

 

 

ODS/pilot is clogged

Clean ODS/pilot (see Cleaning

 

 

 

 

 

 

and Maintenance, page 19) or

 

 

 

7.

Gas regulator setting is not

7.

replace ODS/pilot assembly

 

 

 

Replace gas regulator

 

 

 

8.

correct

8.

Replace module

 

 

 

Bad module

 

 

 

 

 

Burner does not light after pilot

1. Inlet gas pressure is too low

1.

Contact local natural or pro-

is lit

 

 

2.

Wire disconnected from gas

2.

pane/LP gas company

 

 

 

Reconnect leads (see Wiring

 

 

 

3.

control

3.

Diagram, page 24)

 

 

 

Burner orifice(s) clogged

Clean burner (see Cleaning

 

 

 

 

 

 

and Maintenance, page 19) or

 

 

 

5.

Bad module

5.

replace burner orifice(s)

 

 

 

Replace module

 

Delayed ignition burner

1. Manifold pressure is too

1.

Contact local natural or pro-

 

 

 

2.

low

2.

pane/LP gas company

 

 

 

Burner orifice(s) clogged

Clean burner (see Cleaning

 

 

 

 

 

 

and Maintenance, page 19) or

 

 

 

 

 

 

replace burner orifice

116986-01B

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Contents Models VF-18N-MHD, VF-18P-MHD, VF-24N-MHD VF-24P-MHD What to do if YOU Smell GASTable of Contents Safety Information Product Identification Product IdentificationLocal Codes Product FeaturesUnpacking Air For Combustion VentilationDetermining fresh-air flow for heater location Confined and Unconfined SpaceDetermining if You Have a Confined or Unconfined Space Ventilation AIR Ventilation Air From Inside BuildingVentilation Air From Outdoors Check GAS Type InstallationInstallation and clearances for vent-free operation Installation Determining Minimum Mantel Clearance When using a Hood Installing Heater AssemblyMantel Clearances Floor ClearancesInstallation Items Needed Connecting to gas supplyChecking gas connections Natural GasPropane/LP Gas Pressure Testing Heater Gas Connections Adding Embers, Lava rock and Decorative logsTest Pressures Equal To or Less Than Psig 3.5 kPa Operating Heater For your safety Read before lightingFunctions Remote ControlManual Lighting ProcedureTo turn gas off To appliance Inspecting BurnersPilot Flame Pattern Lighting with Piezo IgnitorCleaning Maintenance Burner Flame PatternBurner Injector Holder Air Inlet Hole Injector Holder on Front Burner Tube Observed Problem Possible Cause Remedy TroubleshootingSee Cleaning and Mainte Gas leak. See Warning Bad module Replace moduleIdentifying error signals from receiver Wiring DiagramService Hints Replacement PartsTechnical Service AccessoriesModels VF-18N-MHD, VF-18P-MHD, VF-24N-MHD and VF-24P-MHD Illustrated Parts BreakdownParts List Warranty Information Keep this WarrantyLimited Warranty VENT-FREE GAS LOG Heaters