When a strap machine encounters issues with shrinking and cannot heat normally during operation, check the following aspects:

Check for any failure in the temperature control instrument. Solution: Repair or replace promptly.

2. Inspect for any damage to the contactor. Solution: Replacement is the only option.

3. Inspect for signs of aging and short-circuiting in indoor wire connections. Solution: Reconnect.

4. Inspect for any damage to the heating element. Solution: Replacement is required.

During the operation, the strapping machine encountered a situation where the motor did not rotate.

1. Check for fan damage; Solution: Replace.

2. Inspect the hot air switch for damage  Solve: Replace promptly.

3. Check if the blades are stuck          Solution: Engage and re-open. Additionally, it is recommended that operators check this step after each operation to ensure the longevity of the thermoelectric motor.