Louisville Tin and Stove HEDV254A - Manual (Page 18)

TROUBLE SHOOTING CHART - For use by a qualified service technician.
Page 18
CORRECTIVE ACTION
SYMPTOM POSSIBLE CAUSES To be taken by Contractor
Flame too large 1. Defective operator section of valve. 1. Replace valve.
2. Burner orifice too large. 2. Check with local gas company for proper
orifice - size and replace.
3. If installed above 2,000 ft. 3. See burner orifice section, Page 11.
Yellow burner flame 1. Clogged burner ports. 1. Remove burners and check for obstruc-
tions in throats, ports, and orifices. Clean -
but do not enlarge ports or orifices.
2. Obstruction around vent cap. 2. Make sure area around vent cap is clear, be
sure vent system is sealed.
Gas odor 1. Gas leak. 1. See Page 1.
Delayed Ignition 1. Low gas pressure. 1. Check gas supply pressure.
2. Igniter not properly located. 2. Check ignitor location and correct if
necessary.
Failure to ignite 1. Main gas off. 1. Open manual gas valve.
2. Thermostat not set high enough to call 2. Set thermostat to higher temperature.
for heat.
3. Clogged burner orifice.
3. Clean burner orifices (do not enlarge).
4. Incorrect wiring. 4. Check wiring diagram.
5. Defective valve. 5. Replace valve.
6. No power to unit. 6. Plug in power supply cord. Check 115 V.
wall outlet.
Burner won’t 1. Defective or damaged thermostat wire, 1. Can be checked by removing wire from con-
turn off or thermostat. trol board terminal. If burner goes off, replace
thermostat.
2. Thermostat location. 2.Re-locate out of drafts, hot, or cold spots.
3. Defective or sticking valve. 3. Replace valve.
4. Excessive gas pressure. 4. Contact utility supplying gas.
5. Defective or damaged thermostat. 5. Replace thermostat.
Incorrect gas 1. Gas input not checked. 1. Re-check gas input.
input 2. Clogged orifices. 2. Clean orifices with a smooth wood toothpick,
do not enlarge.
Not enough heat 1. Furnace undersized. 1. This is especially true when a dwelling or
room is enlarged. Have the heat loss
calculated and compare to furnace output.
Your gas company can supply you with this
information. If furnace is undersized,
replace with correct size unit.
2. Thermostat temperature set too low. 2. Raise thermostat temperature setting.
3. Incorrect supply pressure. 3. Check supply pressure.
Too much heat 1. Temperature set too high. 1. Lower temperature setting.
2. Combination control valve stuck open. 2. Replace combination control valve.
Main burner 1. Defective flame sensor. 1. Check voltage and replace if low.
goes out 2. Input too high. 2. Check input rate.
during normal 3. Sight glass not air tight. 3. Tighten screws securing sight glass. Check
operation and replace gasket if needed.
4. Vent tubes not properly installed or 4. Follow instructions. Check both exhaust and
sealed. air intake tubes, and vent cap. Be sure all
gaskets are in place and properly sealed. Use
only tubes and vent cap supplied. Do not
alter vent tubes or cap.
5. Limit switch opens. 5. Check for blockage of discharge air.
6. Exhaust or Air Intake tubes blocked. 6. Check for and remove any obstruction to
incoming circulating air.