Navien NR-10P User Manual page 26

Error Code Reason
DHW Hot water supply:
E008
thermostat -short
E009 Abnormal fan motor activity
E010 Abnormal air pressure
E011 High pressure on heating side
E012 Flame loss
E013 Abnormal Pump Activity
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Self-diagnostic / Action
1. Check the thermostat.
2. Replace the thermostat.
1. Check and clean the intake air filter.
2. Check and clean the fan motor.
1. Check the exhaust pipe for obstructions.
2. Check and clean the intake air filter.
1. Turn off the system.
2. Remove pump drain coke.
3. Drain water to release pressure
4. Re-plug the pump
5. Turn the unit back on.
1. Check the main gas line (valve open?).
2. Check the intake air pipe.
3. Check the ground wire.
4. Check power supply.
1. Check the thermostat.
2. Replace the thermostat.
Error Code Reason
E015 Abnormal PCB board
E016 Overheating of heat exchanger
Space heating return:
E018
Thermostat - open
Space heating return:
E019
Thermostat-short
DHW cold water inlet:
E020
Thermostat -open
DHW cold water inlet:
E022
Thermostat -short
Abnormal activity of the air
E027
pressure sensor
Self-diagnostic / Action
1. Check power supply
2. Check the power switch
1. Turn OFF the system for at least
30 minutes then restart
2. Clean the DHW cold water filter (part#25)
3. Check the heat exchanger; remove
and clean with a cleaning solution
1. Check the Thermostat.
2. Replace the Thermostat.
1. Check the Thermostat.
2. Replace the Thermostat.
1. Check the thermostat.
2. Replace the thermostat.
1. Check the thermostat.
2. Replace the thermostat.
1. Check the exhaust & intake air pipe for
bstructions
2. Check and clean the intake air filter.
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