517Error - Navien NCB-150E Service Manual

5.2.21 517Error

Error occurrence conditions and check items
Change the DIP S/W to the proper
5.2.22 594Error
Error occurrence conditions and check items
Error
E594 error
Check items
Error occurrence conditions and check items
Fault
E594 Error
communication by PCB.
5.2.23 615Error
Error occurrence conditions and check items
Error
E615 error
Check items
Are the DIP S/W on the PCB
properly set?
NO
settings
If the communication is abnormal in parts of PCB, the system displays E594 on the PCB.
Check the PCB.
Possible Causes
1. Click the Reset button on Front panel.
Abnormal 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.
Abnormal signal input by PCB.
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.
Yes
Reset the unit
Description
Check method
Description
Troubleshooting 127