No.

Fault

Cause

Troubleshooting Method

1

Motor fails to start

1. Power cord disconnected

2. Control circuit malfunction

3. Travel or torque control mechanism failure

1. Check the power cord

2. Troubleshoot the circuit

3. Fix the travel or torque control mechanism

2

Output shaft rotation direction does not meet specifications

Incorrect power phase sequence

Swap any two power wires

3

Motor overheating

1. Continuous operation time too long

2. One phase wire disconnected

1. Stop operation and let the motor cool down

2. Check the power cord

4

Motor stops during operation

1. Valve malfunction

2. Electric actuator overload, torque control mechanism activated

1. Check the valve

2. Increase the set torque

5

Motor does not stop or indicator light does not illuminate after valve reaches position

1. Travel or torque control mechanism failure

2. Improper adjustment of travel control mechanism

1. Check the travel or torque control mechanism

2. Readjust the travel control mechanism

6

No remote valve position signal

1. Potentiometer gear set screw loose

2. Remote potentiometer malfunction

1. Tighten the potentiometer gear set screw

2. Check or replace the potentiometer