Troubleshooting a Trauslen Freezer – G12010 Tech Support Needed
Started troubleshooting the Trauslen freezer by opening the evaporator compartment and found the evaporator coil iced up. Turned the unit into defrost and found the heating elements not getting hot. Checked the amperage of the elements and no amps being drawn. Applied direct power to heater relay to close switch and heaters started working, pulling 4.3 amps. Found the controller was not sending power to the heater relay. Went through parameters on the controller and found the evaporator sensor temperature displaying was completely off the chart. Checked the resistance of the sensor and it did not match the temperature / resistance chart in the service manual. Determined the evaporator coil sensor was bad which was causing the unit not to enter the defrost cycle. De-iced the evaporator coil and replaced the evaporator sensor. Placed stubby gauges on service ports and checked the refrigerant charge. Both high and low side pressures running normal. I confirmed the coil sensor temperature in controller to be sure it was reading correctly and it was. Also found some controller parameters had been changed. Spoke with a Traulsen tech support person to run through controller settings and set them back to factory defaults. Tested the freezer’s defrost and operation one last time to confirm everything was working like it should. Watched the box pull down and completed job.
To learn more about the Traulsen freezer click on the PDF here: Traulsen Operation Manual