517Error - Navien NCB-24LSWE Service Manual

5.2.20 517Error

Error occurrence conditions and check items
5.2.21 594Error
Error occurrence conditions and check items
Error
If the communication is abnormal in parts of PCB, the system displays E594 on the PCB.
E594 error
Check the PCB.
Check items
Error occurrence conditions and check items
Possible
Fault
Causes
Abnormal
E594 Error communicatio
n by PCB.
5.2.22 615Error
Error occurrence conditions and check items
Error
Abnormal signal input by PCB.
E615 error
1. Turn the POWER RESET switch OFF then ON (or unplug and then reconnect the power supply.
Check items
2. If the system still displays E615, replace the main PCB.
116 NCB Service Manual
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.
Description
Check method
Description
Version 1.0