| 1 | Machine does not work. | 1.No AC supply. 2.MCB tripped. | 1.Restore AC supply. 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. 2.Conveyor motor stalling. 3.Defective conveyor motor. 4.Conveyor chain disengaged from the sprockets. 5. Conveyor chain breakage. 6.Defective conveyor driver sprocket. 7.Defective board for conveyor drive. 8.Fuse blown. 9.Defective driver PCB. | 1.Increase the conveyor speed. 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.Rectify/replace the conveyor motor. 4.Engage the conveyor chain with the sprockets. 5.Replace both chain together to avoid the mismatching of chains. 6.Replace the conveyor driver sprocket. 7.Replace the board for conveyor drive. 8.Replace the blown fuse 9.Replace the defective PCB. |
| 3 | Conveyor chain slips from the guides. | 1.Low conveyor tension. 2.Misalignment of sprockets and chain rails. | 1.Increase tension by adjusting the conveyor tension adjusters. 2.Align the sprockets and chain rails. |
| 4 | Air blower is not working. | 1.No voltage supply at motor terminals. 2.Defective blower motor. | 1.Restore voltage supply at the motor terminals. 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. 2.Low temperature setting. 3.Temperature is not building up. | 1.Switch on the heater. 2.Increase the temperature setting. 3.Refer to complaint no. 7. |
| 7. | Temperature is not building up. | 1.Loose connection of heaters. 2.Heater failure. 3.Low temperature setting. 4.Defective contactor to heaters. 5.Defective thermocouple. 6. Defective temperature controller. | 1.Make proper connections. 2.Replace the defective heater. 3.Increase temperature setting. 4.Replace the contactor. 5.Replace the thermocouple. 6.Replace the temperature controller. |
| 8 | Excessive shrinking. | 1.High temperature setting. 2.Low conveyor speed. 3.Defective thermocouple. 4.Defective heater contactor due to contact welding. | 1.Reduce the temperature setting. 2.Increase the conveyor speed. 3.Replace the thermocouple. 4.Replace the contactor. |
| 9. | Shrinking is not uniform. | 1.Air turbulence fan is not working. 2.Air turbulence fan is rotating in the wrong direction. 3.Some heaters are not working. | 1.Refer to complaint no. 4. 2. Exchange connections to any two power supply phases. 3.Identify and replace the defective heaters. |
| 10. | Abnormal sound and vibration. | 1.Air turbulence fan loose. 2.Fan motor bearing failure. 3.Machine is not installed on a level surface. | 1.Tighten the nut with which the air turbulence fan is attached to the blower drive shaft. 2.Replace the defective bearing. 3.Ensure that the machine is installed on a level surface. |
| 11. | Display shows fluctuating temperatur values. | 1.Defective temperature sensor. e 2.Defective temperature controller. | a)Replace the temperature sensor. b)Replace the temperature controller. |
