Navien NR-180 Service Manual

©Navien America Inc. 2010 NR/NP series service Manual
100
Version 2.0
5.15. 30Error
Error occurrence conditions and check items.
DescriptionError
30E
Exhaust gas
temperature
error
Check items
If the overheat controller on the top of the exhaust duct operates, the system
displays the heat exchanger bimetal overheat message 30E (cleared manually)
othe room controller and the PCB. (Overh
eat controller operating temperature: 149ȕ)
The boiler switches into Lock-Out, and performs post-purge continuously and
operates the pump.
Is HTL* normally operation?
Yes
No
Replace PCB
Replaace HTL
Check the resistance betweenteo white wires of CN 13:
short-circuit(016E)
Check the resistance betweenteo white wires of CN 13:
short-circuit(030E)
Caution: Measuning should be done at leat 30 minutes
after error.
1. Check if the overheat controller operates normally.
2. Check if the PCB works properly.

Navien NR-180 Specifications

General

Category	Tankless Water Heater
Type	Condensing
Fuel Type	Natural Gas or Propane
Max. Output BTU	180, 000 BTU/h
Energy Factor (EF)	0.96
Water Connection	3/4" NPT
Gas Connection	3/4" NPT
Heat Exchanger	Stainless Steel
Electrical Requirements	120V, 60Hz
Efficiency	96%
Venting	2" PVC/CPVC or 3" Concentric