- Voltage from the Inverter to the Compressor After looking at the compressor as an individual component, our next step is to look at what drives the compressor. Examine the compressor for damage. This is a small box on the side of the compressor with several wires feeding in and out. It is CE approved for use up to 440V 3-phase inverters. by Embraco 27/07/2017 3 minutes Read Many refrigerators have doubts about the state of the compressor when evaluating problems in a refrigeration system: whether it is burned out (and therefore should be discarded and replaced) or is working well and the cause of the problem is otherwise. The main control board will only send a run signal to the inverter when the compressor should be on. Micom defect/Circuit defect 2. Check compressor windings all equal resistance 1 to 4 Ohms, check to earth 50 MOhm minimum, check run current and inverter outputs ; 41 Inverter compressor discharge sensor fault. The "Inverter Phase Check Module" is small enough to drop into the toolbox, and will always help with the analysis of problems on site. Dealing with the inverter. Note: When measuring signal voltage (from the main control board) at the inverter, a reading of 4-6 VDC will be measured with all wires connected. From what i have learned so far the unit electronics are converting the input 240v AC to DC and outputing a variable voltage 3 phase to the compressor. The inverter will select compressor speed (voltage output) based on this signal. Multi V - check inverter cooling fan 63 Multi F(DX) - "Cond. Check the compressor itself for holes or rust damage. Check output from main PCB, check contactor, and check wiring connections. Check the Start Relay. Compressor is pulling more current than allowed in order to start System Grossly Overcharged Compressor full of liquid/oil Compressor Shorted to Ground – Check resistance of windings to ground. 4. It says that the voltage from the control board to the inverter should be between 4 and 6 volts. BUT the compressor is cool and not running, the fridge is warm 70/70. When purchasing your unit, check with the personnel whether the compressor and fans used are DC type before making a decision of buying the air conditioner or heatpump. I watched this video that explains how to diagnose it: Troubleshooting a Warm GE Refrigerator with an Inverter Compressor (GREAT video, by the way!). DC inverter- dedicated power supply AC inverter - VFD of sufficent power and voltage Genarl practice is changing inverter board and compressor in pair, or outdoor unit complete. Check the Compressor jacket for discoloration or burn markings, this can be an indication of overheating You may end up needing to replace the main PCB. Hi Is it possible to test compressors used in DC inverter units using a standard Inverter. Inverter Phase Check g Instantly analyses compressor or inverter fault - on site g Fits easily within a toolbox - only 81mm x 73mm x 28mm! I would like to know how to test: - Voltage from the J15 to the Inverter. Often, the relay can perform poorly if it is very dirty, or if one or more wires have been loosened from repeated wear. Contact the … Similarly, the outdoor fan used is DC fan instead of the conventional AC fan. Look whoo is most valuable company in the world. I have a GE Profile refrigerator with an inverter compressor that is not cooling. You should also check the tubing and wires to make sure that they aren’t disconnected, frayed, or damaged. In many ductless split DC inverter design, the indoor fan used is DC fan instead of AC fan. Inverter compressors are generally driven by an IPM. Compressors are prone to rust on older vehicles. I already replaced - 3 thermisters (1 in FZ and 2 in FF) - the mother board (main board) The compressor still dead silent. 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