Navien CH-180 Service manual - 5. Troubleshooting

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5. Troubleshooting

5.1. Error Code List

Error

Code

Reason

Reset

E001

E002

E003

E004

E005

E006

E007

E008

E009

E010

E011

E012

E013

E015

Self-diagnostic / Action

1. Clean the inlet water filter

2. Check the heat exchanger;  flush with a 

    cleaning solution

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 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

1. Check the water pressure sensor

1. Wait until water supplement is terminated.

Water is boiling inside 

the heat exchanger

Ignition failure

False flame detection

Heating supply outlet:

Thermistor–open

Heating supply outlet:

Thermistor–short

Hot water outlet:

Thermistor–open

Hot water outlet: 

Thermistor–short

Abnormal fan motor 

activity

Abnormal air pressure

Flame loss

Abnormal pump

Abnormal control board

High water pressure

Low water pressure

Manual

Manual

Automatic

Automatic

Automatic

Automatic

Automatic

Manual

Manual

Manual

Manual

Manual

Automatic

Automatic

©Navien America Inc. 2010

CH  series service Manual

Version 1.0