Alpha HW110S Table Saw: Troubleshooting Not Starting

Created by Gabriel Izzo, Modified on Tue, 16 Apr 2024 at 08:57 AM by Gabriel Izzo

(For HW110S-36(P) European Style Magnetic Contactors ONLY, HW110S-36G/PG use a different switch)

When working with table saws and handling electrical diagnostics or repairs, prioritizing safety is crucial to prevent accidents and injuries. Here are some essential safety precautions to follow:

Safety Precautions When Working with Electricity

1. **Disconnect Power Before Maintenance**:

   - Always unplug the table saw before performing any maintenance, adjustments, or when changing the blade.

   - Ensure the machine is powered off and unplugged before attempting any electrical diagnostics or repairs.

2. **Use Insulated Tools**:

   - When working on electrical components, use tools with insulated handles to reduce the risk of electric shock.

3. **Test for Live Wires**:

   - Use a voltage tester to ensure no live wires before starting work on electrical systems.

4. **Avoid Working Alone**:

   - When working with electrical components, it’s safer to have someone nearby who can assist in case of an emergency.

5. **Handle Components Carefully**:

   - Be cautious with electrical components and wiring. Rough handling can lead to damage or accidental exposure to live wires.

6. **Consult a Professional**:

   - If you are not confident in your electrical skills, consider hiring a qualified electrician to perform electrical diagnostics or repairs.

When Testing and Resetting Electrical Components

1. **Follow Manufacturer’s Instructions**:

   - Always adhere to the guidelines provided in the user manual for your specific table saw model, particularly when resetting switches and relays.

2. **Be Cautious with Bypass Buttons**:

   - Bypass buttons should only be used for testing or troubleshooting purposes. Understand their function fully before use, as improper use can lead to dangerous situations.

By adhering to these safety precautions, you can minimize the risk of accidents when using table saws and handling electrical components. Always prioritize safety and never attempt procedures you are not familiar with or trained to handle.

If your machine is failing to start, here’s a structured tutorial to help you diagnose and potentially resolve the issue. By following these steps, you can check whether the problem lies with the power supply or the machine’s internal switch mechanism.

Step 1: Verify Power Supply

1. Check Voltage Supply:

   - Use a multimeter to confirm that the power supplied to the switch is exactly 220V. Ensure that the circuit breaker is also rated at 220V 20A. If you do not own a multimeter, proceed to step 2.


2. Test with Another Machine:

   - If possible, connect another machine that also uses a 220V power source to see if it starts. This can help determine whether the issue is with the power outlet or the machine itself.

   - If no alternative machine is available, you might need to obtain a multimeter or consult with a qualified electrician. If you consult an electrician, consider sending photos of the multimeter readings to confirm that the power supply is adequate.

Step 2: Use the Bypass Button 

(For HW110S-36(P) European Style Magnetic Contactors ONLY, HW110S-36G/PG use paddle style switch)

1. Locate the Bypass Button:

   - Refer to the provided diagram and identify the Bypass Button on the contactor, typically highlighted in red.


2. Activate the Bypass:

   - Press the Bypass Button. This action should bypass the overload relay and attempt to start the motor.

   - Observe if this action starts the machine.

Step 3: Reset the Overload Relay

1. Resetting Procedure:

   - If pressing the Bypass Button starts the motor, locate the reset mechanism next to the Test button, which is usually marked with a plus sign (+). 

   - Check if the Reset Button is sticking out in a tripped position. If so:

   - Reinsert the plus sign button and turn it a quarter turn to secure it.

2. Test the Machine:

   - Try starting the machine again to see if it operates correctly.

Final Check

- If the machine starts successfully after these steps, the issue may have been a temporary glitch or overload that required resetting.

- If the machine still fails to start, further electrical diagnostics may be necessary, potentially involving deeper examination of the electrical components or consulting a professional.

This structured approach helps isolate the problem, ensuring that each potential failure point is methodically tested and addressed.

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