Key Components Description; Pcb - Navien NPE-180A Service Manual

4.11 Key Components Description

4.11.1 PCB

Part
Function To control each component and also to check the overall performance of the unit.
Failure Event Malfunctioning PCB.
A component may not operate within the unit and could produce an error code. In most cases of PCB failure, the
Effects
whole unit will not operate until the problem is resolved.
Error Code E515, E615
Diagnostic Visual inspection: Connection and/or breakage of wires and/or burn marks on the PCB.
Color/Number
of wires
58 NPE Service Manual
Check Point
25 (see page 40)
Version 2.21