This video is a step-by-step guide on how to safely reassign the heat relay to the spare on the relay board of a Harvest Right freeze dryer. No special tools are required for this task. This should only be done on Non-Pro Freeze Dryers.
Reassigning the Heat Relay to the Spare on the Relay Board
Steps:
- Locate the Heater Wires: On the relay board, identify the connection point labelled ‘heater’. It will be the only one with a pair of black wires.
- Remove the Heater Wires: Grab onto the blue connector of these wires and tug upwards to unplug them. If you have difficulty removing them, gently wiggle them back and forth until they come off.
- Relocate the Wires: Plug these two wires onto the relay next to it, labelled ‘drain’.
- Ensure Proper Connection: After plugging them in, give them a gentle tug to ensure that they do not pull off.
- Turn the Freeze Dryer On: Turn your freeze dryer on and navigate to the functional testing screen by touching the leaf icon in the top left corner of the home screen.
- Reassign the Relay: On the functional testing screen, locate the toggle that says ‘aux relay’ and touch it a total of six times to signal the computer to use the new relay as the heat relay.
- Check the Tray Temperature: Turn on the heaters and let them run for about 30 seconds, checking if the tray temperature is increasing. You can also open the door and feel the shelving unit heating up.
