Pelton & Crane Validator® Quick and Easy Way To Check the Triac

by Andy Sandelski
RPI Product Development Department

An RPI document.

Here’s a quick and easy way to check if the Triac on the Power Supply Board is the source of your problem when the Validator is always heating or never heating. With this method, you don’t have to take the machine apart. Simply follow Steps 1-6 below. If the values you read from the ohmmeter are in line with those in Steps 3-5, then it is a good indicator that the Triac is operating properly, which means the Triac is most likely not the problem.

1) Shut machine off. Disconnect power. 2) Remove top cover, then remove clear plastic splash shield. 3) Using the ohmmeter, attach the leads to GATE and MT1 (see diagram). The ohmmeter should read approximately 65 ohms. 4) Using the ohmmeter, attach the leads to GATE and MT2 (see diagram). The ohmmeter should read a very high resistance in the megaohm region. 5) Using the ohmmeter, attach the leads to MT1 and MT2 (see diagram). The ohmmeter should read a very high resistance in the megaohm region. 6) If the values you read from the ohmmeter are in line with those in Steps 3-5, then it is a good indicator that the Triac is operating properly, which means the Triac is most likely not the problem, so continue your troubleshooting.