Atlas Copco DWS VSD+ User Manual

Fault EF3 - External fault(terminal S3)
Cause Thermal overload relay tripped due to motor overheat.
Remedy Check the cooling water.
Fault STO - Safe Torque Off function activated
Cause The EMS button or motor thermal switch been triggered.
Remedy If EMS is triggered, reset the button and reset the fault.
If motor thermal switch is triggered, check the wiring and cooling.
07/2021 - ©Atlas CopcoPage 1271950840208_A
Fault finding

Atlas Copco DWS VSD+ Specifications

General

Brand	Atlas Copco
Model	DWS VSD+
Category	Water Pump
Language	English