Flame Rod Assembly - Navien NCB500-2S/37K Service Manual

4.7.5 Flame Rod Assembly

Item
Function
Fault
Symptoms
Error codes
Diagnostics
Testing/inspection
information
44 System Details
Repeatedly discharges a high voltage spark at the main burner until the gas ignites.
1. Unable to ignite the gas.
2. Results in multiple unsuccessful ignition attempts.
1. The boiler does not ignite and error code E003 or E004 is displayed.
2. The durability of the igniter reduces.
E003, E004, E012
Visual inspection: Check wire connections are secure and inspect for wire damage.
BLACK: 0-10 μA
Ignition gap: 3.5-4.5 mm (1/8")
Description