Navien NR-21DU, Руководство пользователя

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Error Code Guide
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. See the Operation manual.
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 cold water inlet filter. See the Operation
manual.
Flush the heat exchanger. See the Operation manual.
E030 Exhaust overheating the water
heater shuts down when the flue
temperature exceeds 65°C
Turn off the system for at least 30 minutes, and then
restart it.
Clean the cold water inlet filter. See the Operation
manual.
Flush the heat exchanger. See the Operation manual.
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.
Error Code Reason Self-diagnostic / Action
E060 Abnormal operation: dual venturi Contact Technical Support at 1-800-519-8794.
E109 Abnormal operation: fan motor Clean the intake air filter. See the Operation manual.
E110 Abnormal air pressure Ensure that the exhaust pipe is free of obstructions.
Clean the intake air filter. See the Operation manual.
E407 Hot water outlet: thermostat
open or short circuit
Contact Technical Support at 1-800-519-8794.
E421 Cold water inlet1: thermostat
open or short circuit
Contact Technical Support at 1-800-519-8794.
E432 Cold water inlet2: thermostat
open or short circuit
Contact Technical Support at 1-800-519-8794.
E434 Abnormal operation: water
adjustment valve
Contact Technical Support at 1-800-519-8794.
E438 Abnormal operation: circulation
pump
External: Ensure that all water supply and return lines are
open.
Internal: Check the direction of the 2-way valve.
E439 Abnormal operation: flow sensor Contact Technical Support at 1-800-519-8794.
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