Question about True 72 cu. ft. / 2039 liter Commercial Freezer GDM-72F
The problem is simple, the solutiion is difficult. There is a direct short somewhere in the system. If you remove the bottom front grill, you will see where the electricity comes into the unit.From that point forward a bare hot wire is touching the frame of the freezer. If you have a continuety tester, you may be able to find the problem with the power off. This is a time consuming situation and if you are not familiar with electrical circuits, it may be beyond what you are willing to tackle. You will have to isolate each circuit to determine which circuit has the short. One place to start is with the power cord itself. If you have continuety between the ground wire and either of the two hot wires, if 220 volt unit, the problem may be in the cord. If not continue to check the circuits from hot wire to ground. You may be able to disconnect the light circuit from the main power supply to see if the short is there. I have traced shorts for hours before finding a burned wire. Good luck.
Posted on Sep 05, 2010
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Posted on Jan 02, 2017
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With the probes still in place, turn the relay over. You should hear the click of the magnetic switch engaging. The multitester should now display an ohm reading of infinity (or the tester should not light up).
Turn the relay upside down again, place the probe on the "S" terminal and place it on the side terminal labeled "L".
The multitester should now display a reading of zero ohms (continuity). Turn the relay over and the reading should change to infinity.
With the relay upside down place one probe on the "L" terminal and the other probe on terminal labeled "M".
The multitester should display a reading of zero ohms. Turn the relay over and the reading will stay the same, zero ohms.
If the compressor relay does not pass all of these tests, it should be replaced
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