Navien is a manufacturer of various universal energy equipment in Korea. It specializes in the production of gas, diesel boilers. Navien is one of the ten largest Korean manufacturers, which is competing with LG, Samsung, Hyundai and others. The share of sales of Navien in Korea, Japan, the Pacific Region and the United States is 80%. One of the competitive advantages of Navien is its troubleshooting system. Below is a table of Navien boiler error codes.
Navien NCB-150 boiler error codes
|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|
|E047||Abnormal operation: exhaust thermostat|
|E060||Abnormal operation: dual venturi|
|E109||Abnormal operation: fan motor||Clean the intake air filter.|
|El 10||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|
|E351 (error solution e351)||Abnormal Auto feeder valve (make-up water)|
|E352||High water pressure|
|E353 (error solution e353)||Abnormal operation: water pressure sensor|
|E407||Hot water outlet thermistor open or short circuit|
|E421||Cold water inlet thermistor open or short circuit|
|E515 (error solution 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|
|E615||Abnormal operation: input and memory|
|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.
Navien NCB-180 boiler error codes
|(a) Panel||E782 (Level 1)||Automatically releases the error code when the main controller doesn’t answer for 60 seconds but the system operates normal communications once.|
|Communication Error||The error code will be displayed first on the Panel Controller regardless of error level when a Panel Communications Error occurs (as it is not possible to know the Controller error status if communication with the Controller is not available)|
|(b) Key Error||E593 (Level 1)||A Key Error occurs when Touch ICIIC Communication is not available for more than 1 minute and will be automatically released when normal operating conditions are met.|