Troubleshooting; Error Code List - Navien CH-180 Service Manual

5. Troubleshooting

5.1. Error Code List

Error
Reason
Code
Water is boiling inside
E001
the heat exchanger
Low water pressure
E002
Ignition failure
E003
E004 False flame detection
Heating supply outlet:
E005
Thermistor–open
Heating supply outlet:
E006
Thermistor–short
Hot water outlet:
E007
Thermistor–open
Hot water outlet:
E008
Thermistor–short
Abnormal fan motor
E009
activity
Abnormal air pressure
E010
High water pressure
E011
Flame loss
E012
E013 Abnormal pump
E015
Abnormal control board
©Navien America Inc. 2010
Self-diagnostic / Action
1. Clean the inlet water filter
2. Check the heat exchanger; flush with a
cleaning solution
1. Wait until water supplement is terminated.
1. Check if the main gas supply valve is open
2. Check the igniter for spark
1. Check if the main gas supply valve is open
2. Check the igniter for spark
1. Ensure ground wire is connected
2. Check the igniter for spark
1. Check the thermistor
2. Check for loose connection
3. Replace the thermistor
1. Check the thermistor
2. Check for loose connection
2. Replace the thermistor
1. Check the thermistor
2. Look for short or water in connection
3. Replace the thermistor
1. Check and clean the air filter
2. Check and clean the fan motor
3. Check tower on board for loose connection
1. Check the vent and fresh air pipe for obstruc
tions
2. Check and clean the air filter
3. Check hoses and condensate drain
1. Check the water pressure sensor
1. Check the main gas line (valve open?)
2. Check intake air pipe
3. Check ground wire
4. Check power supply
5. Clean flame rod
1. Check the pump
2. Remove air from the pipe
1. Check power supply
2. Check the Emergency Switch
54
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