Key Component Descriptions; Pcb; Error - Navien NCB-24LSWE Service Manual

4.9 Key Component Descriptions

4.9.1 PCB

Item
Function
Fault
Symptoms
Error codes
Diagnostics
Testing/inspection
information
60 NCB Service Manual
Controls each component and monitors the overall performance of the unit.
PCB malfunction.
A system component may not operate and generate an error code. In most PCB failures, the boiler
will not operate until the fault is resolved.
E515, E615
Visual inspection: Check wire connections are secure and inspect for wire damage, and/or PCB
heat damage.
Description
Version 1.0