Navien CH-180, Service Manual, Page: 50 / 155

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4.6.16. Secondary Heat Exchanger
Navien Part No.
Function
Check Point N/A N/A
Failure Event
1. Water and/or exhaust gas leakage through a crack.
2. Improper heat transfer can cause the water in heat exchanger to boil.
Effects
Error Code
E001, E016, E030, E037
Diagnostic
Color /
Number of wires
N/A
1. Main part for heat transfer from the burner.
2. There is additional path of water pipes on the heat exchanger surface as
well as inside the combustion chamber and it minimizes the heat loss.
1. The unit will stop operating once detecting water leakage.
2. Exhaust gas leakage.
3. Make boiling sound.
1. Visual inspection: check if there is a crack on the surface of heat
exchanger.
2. Sound inspection: check if there’s boiling noise.
© Navien Ameri c a I n c . 20 1 0 CH series servi c e Manua l Version 1 .0