Delta NMT LAN 100-120, Installation And Operating Manual

Page: 35 / 64

-35-
GB
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 X Y
E Error marking
X Error group
Y Service code
Error
group (X)
Error
description
Possible cause and solution
1
Low load
detected
There is no medium in the pump. Check if
there is medium in the system.
2 Motor overload
Excessive current load or blocked rotor.
If the issue persists, check if the rotor is
spinning freely.
3 Motor too hot
Motor has exceeded allowed temperature
and is now stopped to cool down. Once
cooled, it will automatically restart.
4 Electronics error
An electronics error was detected.
The pump can still operate, but needs
servicing.
5
Motor/stator
failure
There could be an interruption in the motor
winding. Pump needs servicing.
The service code (Y) is intended for service personal.
If the pump is unresponsive, disconnect and connect it back to the electrical
grid.