| 1 | Machine does not work. | 1.No AC supply. | 1.Restore AC supply. |
| | 2.MCB tripped. | 2.Check the wiring for any short circuit. If satisfactory, reset the MCB or replace the MCB. |
| 2 | Conveyor is not moving. | 1.Conveyor speed changing knob in low position. | 1.Increase the conveyor speed. |
| | 2.Conveyor motor stalling. | 2.Reduce the load on the conveyor. Tilt the machine with a slope towards the direction of conveyor movement to increase the load carrying capacity of the conveyor. |
| | 3.Defective conveyor motor. | 3.Replace the conveyor motor. |
| | 4.Conveyor chain disengaged from the sprockets. | 4.Engage the conveyor chain with the sprockets. |
| | 5. Conveyor chain breakage. | 5.Replace both chains together to avoid the mismatching of chains. |
| | 6.Defective conveyor drive sprocket. | 6.Replace the conveyor drive sprocket. |
| | 7.Defective speed controller | 7.Replace it |
| 3 | Conveyor chain slips from the guides. | 1. Low conveyor tension. | 1.Increase tension by adjusting the conveyor tension adjusters. |
| | 2. Misalignment of sprockets and chain rails. | 2.Align the sprockets and chain rails. |
| 4 | Air blower is not working. | 1.No voltage supply at motor terminals. | 1.Restore voltage supply at the motor terminals. |
| | 2.Defective blower motor. | 2.Replace defective blower motor. |
| 5 | Blower motor works, but the air turbulence fan does not rotate freely. | 1.Shaft fitting Allen screw loose. | (a) Check the fan shaft assembly. |
| | | (b) Ensure free rotation of the shaft and a little axial play. |
| | | (c) Refit the fan assembly mounting plate. |
| 6 | Insufficient shrinking. | 1.Heater switch is off. | 1.Switch on the heater. |
| | 2.Low temperature setting. | 2.Increase the temperature setting. |
| | 3.Temperature is not building up. | 3.Refer to complaint no. 7. |
| 7 | Temperature is not building up. | 1.Loose connection of heaters. | 1.Make proper connections. |
| | 2.Heater failure. | 2.Replace the defective heater. |
| | 3.Low temperature setting. | 3.Increase temperature setting. |
| | 4.Defective contactor to heaters. | 4. Replace the contactor. |
| | 5.Defective thermocouple. | 5.Replace the thermocouple. |
| | 6. Defective temperature controller. | 6.Replace the temperature controller. |
| 8 | Excessive shrinking. | 1.High temperature setting. | 1.Reduce the temperature setting. |
| | 2.Low conveyor speed. | 2.Increase the conveyor speed. |
| | 3.Defective thermocouple. | 3.Replace the thermocouple. |
| | 4.Defective heater contactor due to contact welding. | 4.Replace the contactor. |
| 9 | Shrinking is not uniform. | 1.Air turbulence fan is not working. | 1.Refer to complaint no. 4. |
| | 2.Air turbulence fan is rotating in the wrong direction. | 2. Exchange connections to any two power supply phases. |
| | 3.Some heaters are not working. | 3.Identify and replace the defective heaters. |
| 10 | Abnormal sound and vibration. | 1.Air turbulence fan loose. | 1.Tighten the nut with which the air turbulence fan is attached to the blower drive shaft. |
| | 2.Fan motor bearing failure. | 2.Replace the defective bearing. |
| | 3.Machine is not installed on a level surface. | 3.Ensure that the machine is installed on a level surface. |
| 11 | Display shows fluctuating temperature values. | 1. Defective temperature sensor. | 1. Replace the temperature sensor. |
| | 2. Defective temperature controller. | 2. Replace the temperature controller. |
