Troubleshooting Guide - Electronic Gas Control System - Lennox Hearth Products MERIT PLUS Care And Operation Instructions Manual

LENNOX HEARTH PRODUCTS • MERIT PLUS

TROUBLESHOOTING GUIDE - ELECTRONIC GAS CONTROL SYSTEM

NOTE: Before troubleshooting the gas control system, make sure the external gas shut off valve (located at gas supply inlet) is in the "ON"
position.
NOTE: Valve system troubleshooting should only be performed by a qualified service technician.
SYMPTOM
1. Nothing happens A. Remote control system is
when the fireplace is not functioning properly.
turned ON/OFF.
B. Unit is not receiving power. Check/replace batteries behind the wall switchplate.
C. Gas is not reaching the
fireplace.
2. The main burner A. Gas is not reaching the
does not light fireplace.
and the igniter is
B. Unit is not receiving power. Replace unit battery backup.
sparking.
C. Loose wires to the valve.
D. Loose wires to ignition
module.
E. Air in the gas line.
3. The burner lights, A. Gas is not reaching the
then immediately fireplace.
goes out.
B. Loose wires to the valve or
ignition module.
C. Pilot flame is not engulfing
the sensor.
D. Obstructed vent system.
4. Soot is present on A. Initial fireplace operation.
the glass and panels.
B. Excessive flame
impingement on panels
and fireplace ceiling.
C. Improper air shutter
opening.
D. Improper vent restrictor
setting.
5. Poor flame and/or Door seal is not properly
blue flame. aligned, causing gaps and air
leaks.
*The unit may have multiple gas supply shutoffs (the main gas supply valve in the house, the gas supply valve in the fireplace control
compartment, and/or an additional shutoff valve near the fireplace).
DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • CARE AND OPERATION INSTRUCTIONS
®
POSSIBLE CAUSES
To use the remote control system, the wall switch plate must be set to REMOTE.
Manually operate the fireplace using the wall switch (ON/OFF).
Replace the batteries in the handheld remote and/or behind the wall switchplate.
Replace unit battery backup.
Check building circuit breakers to ensure power is on to the fireplace.
Check the gas supply and gas shutoff valves (call a service technician, if required).*
Check the gas supply and gas shutoff valves (call a service technician, if required).*
Check control compartment for any obvious loose wiring (call a service technician).
Check control compartment for any obvious loose wiring (call a service technician).
Purge gas line of air (call a service technician).
Check the gas supply and gas shutoff valves (call a service technician, if required).*
Check the gas supply and gas shutoff valves (call a service technician, if required).*
Call a service technician.
Call a service technician.
A white film may develop on the glass during the first few fires as part of the burn-in
process.
See glass cleaning instructions in the MAINTENANCE section of this manual.
Properly position the media as detailed in the instructions provided with the Media Kit.
Open the air shutter by adjusting the air shutter adjustment lever according to the
instructions in this manual.
Open the air shutter by adjusting the air shutter adjustment lever according to the
instructions in this manual.
Remove and realign the door so the gasket seal is fully engaged around the door
frame.
CORRECTIVE ACTION
The first few times you use the fireplace, clean the glass after each use (AFTER
THE GLASS HAS COMPLETELY COOLED); otherwise, the white film will bake onto
the glass and become difficult to remove.
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