Troubleshooting - Vermont Castings NBST27 Installation Instructions Manual

TROUBLESHOOTING

Turn off heater and allow to cool before
cleaning. Disconnect electrical power
before cleaning or servicing.
Problem
When ignitor button is
pressed, there is not spark
at ODS/pilot.
Appliance produces un-
wanted odors.
Appliance shuts off during
use.
Gas odor even when
control knob is in OFF
position.
When ignitor button is
pressed, there is spark at
ODS/pilot, but no ignition.
81D3032
Possible Cause
1. Ignitor electrode positioned wrong.
2. Ignitor electrode is broken.
3. Ignitor electrode not connected to
ignitor cable.
4. Ignitor cable pinched or wet. Keep
ignitor cable dry.
5. Broken ignitor cable.
6. Bad piezo ignitor.
1. Appliance burning vapors from
paint, hair spray, glues, etc.
2. Gas leak.
3. Initial burn off.
1. Not enough fresh air is available for
ODS/pilot to operate.
2. Low line pressure.
3. ODS/pilot is partially clogged.
4. Defective thermopile.
5. Restrictions in incoming air flow.
1. Gas leak.
2. Control valve defective.
1. Gas supply turned off or manual
shutoff valve closed.
2. Control knob not in PILOT position.
3. Control knob not pressed in while in
PILOT position.
4. Air in gas lines when installed.
5. ODS/pilot is clogged.
6. Gas regulator setting is not correct.
NOTE: All troubleshooting items are listed in order of
operation.
1. Replace ignitor.
2. Replace ignitor.
3. Reconnect ignitor cable.
4. Free ignitor cable if pinched by any
metal or tubing.
5. Replace ignitor cable.
6. Replace piezo ignitor.
1. Ventilate room. Stop using odor caus-
ing products while heater is running.
2. Locate and correct leaks.
3. Ventilate room and turn unit on high
until odor is gone. Odor should be gone
after 6 hours of continuous use.
1. open window and/or door for ventila-
tion.
2. Contact local gas company.
3. Clean ODS/pilot.
4. Check wire connections. Check output
should be 500 mV across TH/TP and
TP terminals with ON/OFF switches off.
5. Check for bottom riser on glass door,
sunken fireplace, excessive lava rock/
cinders densely packed against grate.
1. Locate and correct all leaks.
2. Replace control valve.
1. Turn on gas supply or open manual
shutoff valve.
2. Turn control knob to PILOT position.
3. Press in control knob while in PILOT
position.
4. Continue holding down control knob.
Repeat igniting operation until air is
removed.
5. Replace ODS/pilot assembly or get it
services.
6. Check incoming pressure. Replace gas
regulator.
NBST27 Unvented Gas Log Set
Solution
23