LENNOX HEARTH PRODUCTS • MONTEBELLO
®
DLX POWER VENT DV GAS FIREPLACES (MDLX40/45IN-PV) • CARE AND OPERATION INSTRUCTIONS
24
SYMPTOM
POSSIBLE CAUSES
CORRECTIVE ACTION
Nothing happens when the
fireplace is turned ON/OFF.
Remote control system is not
functioning properly.
To use the remote control system, the Wall ON/
REMOTE/OFF switch must be set to REMOTE.
Manually operate the fireplace using the Wall
ON/REMOTE/OFF switch.
Replace the batteries in the handheld remote
and/or behind the Wall ON/REMOTE/OFF
switch plate.
Unit is not receiving power.
Check/replace batteries behind the
wall switchplate.
Check building circuit breakers to ensure power
is on to the fireplace.
Gas is not reaching the fireplace.
Check the gas supply and gas shutoff valves (call
a service technician, if required).*
The main burner does not light
and the igniter is sparking.
Gas is not reaching the fireplace.
Check the gas supply and gas shutoff valves (call
a service technician, if required).*
Loose wires to the valve.
Check control compartment for any obvious
loose wiring (call a service technician).
Loose wires to ignition module.
Check control compartment for any obvious
loose wiring (call a service technician).
Air in the gas line.
Purge gas line of air (call a service technician).
The burner lights, then
immediately goes out.
Gas is not reaching the fireplace.
Check the gas supply and gas shutoff valves (call
a service technician, if required).*
Loose wires to the valve or
ignition module.
Check the gas supply and gas shutoff valves (call
a service technician, if required).*
Pilot flame is not engulfing the sensor.
Call a service technician.
Obstructed vent system.
Call a service technician.
Log and glass soot
Flame impingement on the top log.
Check for proper log placement.
Improper Air shutter opening.
Check for proper air shutter openings.
Table 20: Troubleshooting Guide—Electronic Gas Control System
*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).
TROUBLESHOOTING GUIDE
Electronic Gas Control System
NOTE: Service must be performed by a qualified installer, service agency, or your gas supplier.
BEFORE TROUBLESHOOTING THE UNIT:
1. Confirm there is power to the unit (fireplace).
2. Confirm there is gas to the unit (fireplace).
3. The igniter module in the fireplace is equipped with a device that can put the unit into a lockout state. Follow the steps in the chart below to reset the
control: Turn the ON/REMOTE/OFF switch to the OFF position, or turn the remote to the OFF position.
4. If this is the first time that the unit has been fired, check the wiring of the unit against the wiring diagram before commencing troubleshooting.
