Navien NCB-150E, Руководство по обслуживанию

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Troubleshooting 85
Error Code Sub Code Function Self-diagnostic/Action
E615
0
Abnormal input data from High limit switch of
Heat exchanger
●
Check the HTL and connection.
●
Check the PCB.
1 Abnormal input data from exhaust sensor
●
Check the exhaust sensor wiring connection
●
Check the exhaust sensor
2 Abnormal input data from flame rod
●
Check the flame rod wiring connection.
●
Check the flame rod.
3-14 Abnormal memory of PCB
●
Check the PCB
15
Below the range of input data from Pressure
sensor
●
Check the Pressure sensor wiring connection
●
Check the output voltage of pressure sensor
16
Over the range of input data from Pressure
sensor
E740
1
Abnormal outdoor temperature sensor (Open)
(appears only when the outdoor reset curve is
enabled).
1. Ensure that the outdoor reset curve is configured properly.
2. Check the outdoor temperature sensor wiring connection.
2
Abnormal outdoor temperature sensor (Short)
(appears only when the outdoor reset curve is
enabled).
E777 0 Abnormal operation: LWCO
●
Check the LWCO wiring connection
●
Ensure that the system water level is appropriate.
●
Add make-up water to the system if necessary.
●
Check for proper voltage from connector(24VAC).
E782 0 Abnormal Main-Panel communication
●
Check the connection between PCB and Panel
●
Check the PCB.
If any of the above solutions do not resolve the problem with the Boiler, contact Navien’s Technical department at 1-800-519-8794.
There will be error codes displayed on the front panel and recorded on the PCB board (within the unit) of any problems or failures that occur
with the Boiler.
IMPORTANT
To reset the Boiler, either press the [Reset] button on the front panel or disconnect, then reconnect electrical power to the boiler.