How is a Bench Temp Failure to be fixed?
Record all front panel TST values and take note of the temperature value. Feel the top of the bench and see if it corresponds to the temperature. For example if it reads approximately 25C, the unit should be cool to the touch and if it reads approximately 60C, it will be hot. If cool, navigate to the Signal I/O menu located in the DIAG menu and find where the heater can be manually controlled. Measure the 120 VAC voltage going to the heater and verify if it is being cycled when the heater is being turned on/off. If the voltage properly cycles but the bench doesn’t get hot, the problem is likely the strip heater. If the 120V doesn’t cycle on and off, the problem is likely the relay board.
