General Troubleshooting Guide; Warning - Slant/Fin LYNX LX-85A Installation And Operating Instructions Manual

National Excelsior Company
www.excelsiorhvac.com
42
GENERAL TROUBLESHOOTING GUIDE FOR SERVICE PERSONNEL

WARNING:

Only a trained, experienced service technician should perform troubleshooting.
Turn off all electrical power to the boiler before servicing.
A. BURNER FAILS TO OPERATE - NO HEAT
CAUSE
1. No power, display off, power switch off. Main electric
switch open. Blown or defective line fuse.
2. Gas supply valve shut off.
3. Harnesses plug-in connectors are not securely connected.
4. Operational problem, detected by control.
B. NOT ENOUGH HEAT
1. Thermostat setting is too low.
2. Boiler water maintained at too low temperature.
3. Circulator not running.
4. Boiler water level too low.
5. Fuel input rate too low.
C. FUMES AND GAS ODORS
1. Leaks in gas piping or accessories.
2. Gas leaks in service line or meter connections.
3. Condensation trap is not full of water.
4. Venting system is physically damaged.
5. Over - firing or poor combustion.
REMEDY
1. Close switch. Check or replace fuse.
2. Open gas supply valve. Check gas pressure.
3. Check connectors on boiler control.
4. Error code on display can be correlated to
1. Set thermostat at higher setting.
2. Increase space heating set point temperature.
3. With thermostat calling for heat, check for power
4. Carefully snap open relief valve handle to
5. Check the maximum fuel input firing rate.
1. Locate leaks and repair.
2. Close service supply valve - shut down boiler
3. Check and fill with water
4. Check carefully and repair. Also, see "Venting
5. Check the maximum fuel input firing rate and
Subject to change without notice.
specific problems and remedy. Refer to page
38-40 for error codes.
Refer to Table 4 on page 32.
to circulator. If power is O.K. but circulator is not
running, replace circulator.
determine if boiler is full of water, if not full of
water, check for system leaks and check water
pressure regulator. Repair any system leaks.
Adjust or replace water pressure reducing valve.
Refer to page 37 for the procedure.
and notify utility.
System Regular Inspection".
combustion. Refer to page 37 for procedure.