WEG SSW-08 User Manual - page 51

6

Solution and Troubleshooting

46 | SSW-08

6.2 TROUBLESHOOTING

Table 6.2: Solving the most frequent problems

Problem

Points to check

Corrective action

Motor does not run

Wrong wiring

Check all the power and command connections.

For example:

The DIx digital inputs programmed as enabling or external 

fault must be connected to AC supply.

Wrong programming

Check if the parameters are with the correct values for the 

application.

Fault

Check if the Soft-Starter is not blocked to a detected fault 

condition.

Motor does not 

reach nominal speed

Motor stall

Increase the current limit level with the control to limit the 

current (refer to table 6.1).

Motor rotation 

oscillates (fluctuates)

Loose connections

Switch the Soft-Starter and the power supply off and 

tighten all the connections.

Check all the internal connections of the Soft-Starter to 

make sure they are well connected.

Motor rotation:

Too high or too low

Motor nameplate data 

Check if the motor used is in accordance to the application.

LEDs off

Check the power supply 

voltage of the control 

board (A1 and A2)

Nominal values must be inside the following limits:

Umin. = 93.5 Vac

Umax.= 264 Vac

Vibration during 

acceleration

Soft-Starter Settings

Reduce the acceleration ramp time.

Reduce the pedestal voltage setting.

NOTE!

When contacting WEG for service or technical assistance, please have the following 

data on hand:

Model of the Soft-Starter;

Serial number, production date and hardware revision present in the identification 

label of the product (refer to item 2.3);

Installed software version (refer to item 2.3);

Application and programming data.

For explanations, training or service, please contact WEG Automação Service Department.