Error And Troubleshooting - Delta NMT LAN Series Installation And Operating Manual

6

Error and Troubleshooting

If pump failure occurs, the error causing the failure will appear in the display
screen.
Errors on the screen are identified as:
E Error marking
X Error group
Y Service code
Error
group (X) description
Low load
1
detected
2 Motor overload
3 Motor too hot
4 Electronics error
Motor/stator
5
The service code (Y) is intended for service personal.
If the pump is unresponsive, disconnect and connect it back to the electrical
grid.
Error
Possible cause and solution
There is no medium in the pump. Check if
there is medium in the system.
Excessive current load or blocked rotor.
If the issue persists, check if the rotor is
spinning freely.
Motor has exceeded allowed temperature
and is now stopped to cool down. Once
cooled, it will automatically restart.
An electronics error was detected.
The pump can still operate, but needs
servicing.
There could be an interruption in the motor
failure winding. Pump needs servicing.
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E X Y