Error - Navien NCB-24LSWE Service Manual

5.2.4 Error 012

Error Conditions and Checklist
Error
If the system detects a loss of flame during combustion, the system stops the gas supply and attempts to
E012
restart. Then, the system adds the instance to the flame loss count. If flame loss occurs 20 times
Loss of flame
consecutively, error code '012E' is displayed (manually cleared) on the front panel.
1. Use a manometer to measure the gas supply pressure (NG: 17 - 25 mbar, LP: 25 – 35 mbar)
2. Check the gas meter rating.
3. Tighten the ground connection screws on the heat exchanger.
Checklist
4. Check if the gas orifice is obstructed.
5. Check if the PCB is working correctly.
Version 1.0
Description
NCB Service Manual 91