Maytag LMDV-40 SERIES, LMDV-33 SERIES manual Troubleshooting Procedure Electronic Ignition System

Page 21

TROUBLESHOOTING PROCEDURE - ELECTRONIC IGNITION SYSTEM

START

CHECK

• Turn Off Gas Supply.

 

• Check for proper volt-

 

 

 

• Ensure Valve Switch Is In ON Position.

 

age at control harness

 

Line voltage power

• Disconnect Control Harness.

 

(see insert A). Voltage

NO

Low voltage transformer

• Set Thermostat To Call For Heat.

2

should be 24V between

 

Limit controller

 

thermostat or pressure

 

• Thermostat

 

 

 

 

 

 

Wiring

 

 

switch and 24V common

 

 

 

 

 

 

 

 

and 24V hot.

 

 

 

 

 

YES

 

 

 

Insert A

• Plug control harness into

 

valve. Wait for internal check

End View of Control Harness Connector

delay.

 

 

 

24 Volt Hot

24 Volt

 

 

 

 

 

• With pilot burner cable con-

 

 

Common

 

 

 

 

1

 

 

 

 

 

 

NO

 

nected, measure voltage at

NO

 

 

 

 

• Igniter warms up and glows

 

 

• Replace valve.

 

 

 

 

 

 

valve HSI element output. 24V

 

 

 

 

 

red.

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

 

 

 

 

 

 

 

nominal. (See insert B)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

YES

 

 

24 Volt

 

 

1

YES

 

• Replace igniter/flame rod

 

 

 

 

 

 

 

 

assembly.

 

 

Switched

 

 

 

 

 

 

 

 

Check For Damaged or Missing

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

Terminals in Connector

 

 

 

NO

• Check that pilot gas is flowing. Wait

NO

 

 

 

 

• Turn on gas supply.

 

to ensure pilot gas tubing is purged.

• Replace valve.

 

 

 

 

 

 

 

 

• Pilot burner lights.

 

 

Recycle call for heat if necessary.

 

 

Insert B

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Igniter Terminals

 

 

 

 

• Measure voltage between 24V hot and

 

 

 

 

 

 

 

 

24V common leads to valve control.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Must measure at least 19.5 VAC with

NO

• Check transformer and

 

 

 

 

 

 

 

 

igniter powered (see insert A). To

line volt supply.

 

 

 

 

 

YES

 

 

identify proper lead, this check must

 

 

 

 

 

 

 

 

 

be done with the valve control con-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

nected and igniter powered.

 

 

 

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

Replace Pilot Assembly.

 

 

 

 

 

 

 

 

 

Check that pilot flame makes good

 

 

 

 

 

 

 

 

 

 

contact with pilot burner flame rod.

 

 

 

 

 

Main valve opens and main

NO

• Check for good electrical connection

 

 

 

 

 

 

burner lights.

 

 

through the pilot tubing.

 

 

 

 

 

 

 

 

 

• If both of the above are good, replace

 

 

 

 

 

 

 

 

 

 

igniter/flame rod assembly.

 

 

 

 

 

 

 

YES

 

 

 

YES

 

 

 

 

 

• System Is okay.

 

• Cycle thermostat off and back on.

 

 

1

Igniter

will cycle off

and

2

When measuring voltage

 

 

 

 

 

 

back on once during the 90

at connections, use care

 

 

 

 

NO

 

 

 

 

 

 

 

 

 

second

ignition trial.

All

 

to ensure terminals are

 

Main burner lights.

 

• Replace valve.

 

voltage measurements must

 

not damaged.

 

 

 

 

 

 

 

be taken while the igniter is

 

 

 

 

 

 

 

 

 

powered.

 

 

 

 

 

 

 

 

 

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

21

Image 21
Contents 875,028M REV. C 06/2005 Retain These Instructions For Future ReferenceLMDV-3530 Model Shown Listing Agency OTL Report No -F-31-5Congratulations Table of ContentsBurn-in Period Gas PressureInlet Gas Supply Pressure All models Fuel # Minimum Maximum SeriesOFF/ON switch Reinstalling Control Compartment DoorOperation and Care of Your Appliance Control ValveMaintenance See Maintenance Schedule,SIT Millivolt Gas Valve Front Glass Enclosure Panel, Removal and Installation Installing Glass Enclosure Panels Remove the top louver assembly by pulling it up and outRemoving Glass Enclosure Panels See FigureLMDV-4035 Install as Follows Placement of Glowing EmbersGlowing Embers ReferenceCatalog Number H3366 LOG SETCatalog Number H3365 Model LMDV-4035Air Shutter Adjustment Guidelines Burner AdjustmentsFlame Appearance and sooting Qualified Technicians onlyElectronic Pilot Assembly Ensurefrontglasspanelisinplace and sealed during adjustmentMillivolt Wiring Diagram Wiring DiagramsWarranty Replacement Parts Your Fireplaces Model NumberAccessory Components Product Reference InformationWall Thermostat Accessory Components Screen Heat Guard Kit Polished Brass Piece Trim KitPolished Brass & Brushed Stainless Louvers Kits Polished Brass & Brushed Stainless 2-Piece Door Frame KitsTo Turn OFF GAS to Appliance What to do if YOU Smell GASTo on What to do if YOU Smell GAS Lighting Instructions ElectronicLighting Instructions To Shut OFFMaintenance Schedule Maintenance Task Accomplishing Person ProcedureWhile HOT Symptom Possible Causes Corrective Action TroubleshootingTroubleshooting Procedure Electronic Ignition System Gas Controls SIT Millivolt Replacement Parts ListGas Controls Honeywell Millivolt Gas Controls Honeywell ElectronicLMDV-4035 LMDVT-3328 & LMDVR-3530 Replacement PartsWest Taft Avenue Orange, CA 24 P/N 875,028M REV. C 06/2005

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