22 Troubleshooting
5.2 Understanding Error Codes
When an error code appears on the front panel, refer to the following chart for a definition and possible remedy for the situation.
Error Code Reason Self-diagnostic / Action
E003 Ignition failure Ensure that the main gas supply valve is open.
E004 False flame detection Ensure that the electrical cord is properly grounded.
E012 Flame loss
●
Clean the intake air filter.
●
Ensure that the electrical cord is properly grounded.
E016 Overheating of heat exchanger
●
Turn off the system for at least 30 minutes, and then restart it.
●
Clean the Heating Return filter.
●
Flush the heat exchanger.
E030 Abnormal exhaust temperature Contact Technical Support at 1-800-519-8794.
E046 Abnormal operation: limit control Contact Technical Support at 1-800-519-8794.
E047 Abnormal operation: exhaust thermostat Contact Technical Support at 1-800-519-8794.
E060 Abnormal operation: dual venturi Contact Technical Support at 1-800-519-8794.
E109 Abnormal operation: fan motor Clean the intake air filter.
E110 Abnormal air pressure
●
Ensure that the exhaust pipe is free of obstructions.
●
Clean the intake air filter.
E205 Heating supply thermistor open or short circuit Contact Technical Support at 1-800-519-8794.
E218 Heating return thermistor open or short circuit Contact Technical Support at 1-800-519-8794.
E351 Abnormal Auto feeder valve (make-up water) Contact Technical Support at 1-800-519-8794.
E352 High water pressure Contact Technical Support at 1-800-519-8794.
E353 Abnormal operation: water pressure sensor Contact Technical Support at 1-800-519-8794.
E407 Hot water outlet thermistor open or short circuit Contact Technical Support at 1-800-519-8794.
E421 Cold water inlet thermistor open or short circuit Contact Technical Support at 1-800-519-8794.
E515 Abnormal operation: PCB
●
Ensure that the electrical cord is properly grounded.
●
Reset the boiler from the front panel.
E517 Abnormal operation: DIP switch setting Contact Technical Support at 1-800-519-8794.
E594 Abnormal operation: EEPROM Contact Technical Support at 1-800-519-8794.
E615 Abnormal operation: input and memory Contact Technical Support at 1-800-519-8794.
E740
Abnormal operation: outdoor temperature
sensor (appears only when the outdoor reset
curve is enabled).
●
Ensure that the outdoor reset curve is configured properly.
●
Check the outdoor temperature sensor wiring connection.
E777 Abnormal operation: LWCO
●
Check the LWCO wiring connection
●
Ensure that the system water level is appropriate.
●
Add make-up water to the system if necessary.
E782 Abnormal operation: main panel communication Contact Technical Support at 1-800-519-8794.
If any of these remedies do not resolve the problem, contact Technical Support at 1-800-519-8794.
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