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Service Advisor

July 2018

Recently, Croatia made an unbelievable run to their first World Cup finals. While that may have seemed unlikely, the chances of your processing equipment overheating are not. Whether your plant is in a region that is hot seasonally or year-round, more than just the weather heats up your plant. The equipment in your processing lines also generates heat, adding to the variables that must be dealt with. In this issue of the Service Advisor we will discuss temperature issues and how to troubleshoot them.

Keep Your Sorter Cool When the Plant Gets Hot

Keep Your Sorter Cool

Just like people and animals, your processing equipment can be adversely affected by the heat, and the key to keeping it cool is keeping it hydrated. Depending on the design and the sensor configurations (cameras and lasers) some sorting systems use water-based heat exchangers while others have a dedicated chiller or both. Acting as a radiator, heat is pulled from the sorter through the liquid flowing through the heat exchanger or chiller.

The water supplied to the sorter for cooling and the CIP must be potable and free of suspended solids; remember to check and replace filters as needed. The maximum water temperature should not exceed 18°C (65°F). Refer to your technical manual for specific details about water temperature, flow and pressure for your sorter, as some requirements vary by model.

When the temperature of the sorter cabinet reaches approximately 38°C (100°F), an over-temperature warning occurs and the user interface will indicate there is an issue. An audible alarm will also sound and the warning light will flash. Pressing the warning button will only silence the alarm and the warning light will continue to flash until the temperature of the cabinet is below 38°C (100°F). If the temperature inside the sorter cabinet reaches approximately 43°C (110°F) the sorter will shut down.

Troubleshooting over-temperature conditions

  • Verify there is adequate water flow through the heat exchanger.
  • Change the in-line water filter if it is clogged. For instructions, refer to the Air and Water Supply chapter in your technical manual.
  • Ensure the water drain hose is unobstructed and flow is not restricted.
  • Make sure the warning and over-temperature thermostats are set to 38°C (100°F) and 43°C (110°F) respectively. These are factory set and normally do not need adjusting, but you should confirm settings if an over-temperature incident occurs.
  • Ensure the temperature probe is properly installed. For instructions, refer to the Air and Water Supply chapter in the technical manual.
  • Replace the master water valve, if necessary. For instructions, refer to the Air and Water Supply chapter in the technical manual.
  • Verify the heat exchanger cooling fan and blower are working properly.
  • If you are unable to determine the cause of the over-temperature condition call Key Technology Customer Service.

On sorters equipped with a laser, an external chiller is generally used to keep the laser cool. Refer to your technical manual for operation and troubleshooting procedures if an over-temperature incident occurs.