Navien NHB-055 Service Manual

NHB Service Manual 65
Version 1.0
4.9 Key Components Description
4.9.1 PCB
Part Check Point
Function Controls each component and monitors the overall performance of the unit.
Failure Event Malfunctioning PCB.
Effects
A component may not operate within the unit and could produce an error code. In most cases of
PCB failure, the whole unit will not operate until the problem is resolved.
Error Code E515, E615
Diagnostic
Visual inspection: Check wire connections are secure and inspect for wire damage, and/or PCB heat
damage.
Color / Number of wires Refer to page 63-64

Navien NHB-055 Specifications

General

Brand	Navien
Model	NHB-055
Category	Boiler
Language	English