General Troubleshooting Guide - Slant/Fin Jaguar J-390 Installation And Operating Instructions Manual

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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 traps are not full of water.
4. Venting system is physically damaged.
5. Over - firing or poor combustion.
Jaguar Model J-390
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
specific problems and remedy. Refer to page
38-40 for error codes.
1. Set thermostat at higher setting.
2. Increase space heating set point temperature.
Refer to Table 4 on page 32.
3. With thermostat calling for heat, check for power
to circulator. If power is O.K. but circulator is not
running, replace circulator.
4. Carefully snap open relief valve handle to
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.
5. Check the maximum fuel input firing rate.
Refer to page 37 for the procedure.
1. Locate leaks and repair.
2. Close service supply valve - shut down boiler
and notify utility.
3. Check and fill with water
4. Check carefully and repair. Also, see "Venting
System Regular Inspection".
5. Check the maximum fuel input firing rate and
combustion. Refer to page 37 for procedure.