| 1 | The machine doesn’t seal | Lowsealing time set. | Increase sealingtime |
| | Sealing blade is damaged. | Replace the sealing blade. |
| | Small gapbetween trip screw and blade clamp. | Increase the gap. |
| | Sealing blade transformer fuseblown. | Replace the fuse |
| | Defective transformer. | Replace it. |
| | Defective microcontroller board | Replace it. |
| 2 | Perfect Sealing,but Imperfect shrinking | Shrink temperature setting is low. | Increase the shrinking temperature. |
| | Temperature is not building up. | Check the cartridge heaters & replace itif defective. |
| | Defective temperature sensor. | Replace the temperature sensor. |
| | Defective microcontroller Board. | Replace the microcontroller Board. |
| 3 | Perfect sealing,but over shrinking | Temperature sensor wires shorted. | Replace the temperature sensor. |
| | Defective Microcontroller board. | Replace microcontroller Board |
| | Defective heater contactor. | Replace it. |
| 4 | Blower motor does notwork | Blower motor fuse blown. | Replace the fuse. |
