Navien NCB-210 Service Manual

5.2.20 517Error
Error occurrence conditions and check items
5.2.21 594Error
Error occurrence conditions and check items
Error
Description
E594 error
If the communication is abnormal in parts of PCB, the system displays E594 on the PCB.
Check items
Check the PCB.
Error occurrence conditions and check items
Fault
Possible
Causes
Check method
E594 Error
Abnormal
communication
by PCB.
1. Click the Reset button on Front panel.
2. Turn the POWER to the unit OFF then ON. Disconnect then reconnect power if
necessary.
3.
If the system still displays E594, replace the main PCB.
5.2.22 615Error
Error occurrence conditions and check items
Error
Description
E615 error
Abnormal signal input by PCB.
Check items
1.
Turn the POWER RESET switch OFF then ON (or unplug and replug the power supply.
2. If the system still displays E615, replace the main PCB.
Are the DIP S/W on the
PCB properly set?
Change the DIP S/W to
the proper settings
Reset the unit
NO
Yes

Navien NCB-210 Specifications

General

Brand	Navien
Model	NCB-210
Category	Boiler
Language	English