012Error - Navien NPE-180A Service Manual

5.1.3 012Error

Error occurrence conditions and check items
Error
If the system detects loss of flame during combustion, the system stops supplying fuel, attempts to restart,
E012
counts the incidents of flame loss, and if the incident occurs 20 times consecutively displays 012E (manually
Flame loss
cleared) on the front panel.
1. Measure, with a manometer the gas supply pressure (NG: 3.5" ~ 10.5" W.C, LP: 8"~ 13.0" W.C)
2. Check the Gas meter Capacity.
3. Tighten the ground connection screws on heat exchanger.
Check items
4. Check if the gas orifice is clogged.
5. Check if the PCB is working properly.
see page 52 for Wiring Diagram
* Check the flame detection
AD value for proper resistance.
(refer to page 42~43)
Does the
water heater have
sufficient gas
pressure?
Gas Pressure
Yes
Natural Gas: 3.5" - 10.5" W.C.
LP Gas: 8.0" - 13.0" W.C.
Check connector
(#1 of CON10)
Description
NO
Check the gas pressure
Troubleshooting 83