Navien NPE-240A Service Manual

System Details 63
4.11.6 Ignition Transformer
Part Check Point
Function To ignite gas by repeatedly discharging a high voltage spark to the main burner until gas ignites.
Failure Event
1. Unable to ignite during the ignition process.
2. Produces multiple unsuccessful attempts to ignite.
Effects
1. The unit cannot ignite during the ignition process and “E003” or “E004” error codes will display.
2. Durability of the igniter wears down.
Error Code E003, E004
Diagnostic
1. Visual inspection: Connection and/or breakage of wires.
2. Voltage check: Check range of voltage shown below.
Color/Number
of wires
Blue
●
On : AC 97 ~ 138 V
●
Off : 0 V
Input Voltage Output Voltage Output Current
120 V, 60 Hz 20 KV± 10mA±2mA

Navien NPE-240A Specifications

General

Type	Tankless
Fuel Type	Natural Gas or Propane
Energy Factor	0.97
Energy Efficiency	97%
Voltage	120V
Ignition Type	Electronic
Maximum Input	199, 900 BTU/h
Water Connection Size	3/4"
Gas Connection Size	3/4"
Warranty	15-year on heat exchangers, 5-year on parts, 1-year on labor
Dimensions	17.3" W x 13.2" D x 27.4" H