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41978-2-0321
Page 56
MV - CONTROL SYSTEM TROUBLESHOOTING (CONT’D)
PROBLEM OBSERVED
POSSIBLE CAUSE
CORRECTIVE MEASURE
Burner takes too long to fully light
Low gas pressure
Check gas supply pressure
Clogged or dirty carryover/burner ports
Clean ports
Blocked orifice
Check orifice opening
Faulty valve
Replace valve
Too much crushed glass media
Remove excessive glass media
Burner & pilot light but will not stay lit
Low gas pressure
Check gas supply pressure
(For fireplace equipped with optional
thermostat or thermostat remote) Room
temperature is higher than thermostat
setting
Move (optional) remote away from
fireplace
Set higher temperature on (Optional)
remote/thermostat
Faulty pilot or thermocouple
Replace pilot
Incorrect burner flame
Incorrect gas supply or pressure
Check gas supply pressure
Blocked or incorrect orifice
Check orifice opening
Clogged or dirty burner ports
Clean burner ports
Faulty valve
Replace valve
High altitude
Adjust orifice size for altitude
Too much crushed glass media or too
many logs/rocks on burner surround
Remove excessive media. Reduce
number of logs/rocks
Flame burns blue and lifts off main
burner.
Insufficient oxygen being supplied.
Check to make sure vent cap is installed
properly and free of debris. Make sure
that vent system joints are tight and have
no leaks.
Check to make sure that no material has
been placed at the main burner base.
Fireplace produces unwanted odors
Initial burn-off of manufacturing chemicals
Ventilate room until odor stops
Whistle noise from fireplace
Check gas pressure
Adjust gas pressure to recommended
setting.
Air in gas line
Bleed lines
Shut-off not in fully open position
Open valve to full position
Spiral gas flex line pinched or too small
diameter line
Straighten flex line where pinched or
replace gas feed line with larger diameter
Flame is faint or “ghosting”
Too much crushed glass media or too
many logs/rocks on burner surround
Remove excessive media. Reduce number
of logs/rocks
With proper installation and maintenance, your new Direct-Vent Gas Fireplace will provide years of trouble-free service. If you do experience a problem,
refer to the Troubleshooting Guide below. This guide will assist a qualified service person in diagnosis and corrective action.