As a DIY user with advanced hands-on expertise, testing a Gree inverter board can be a complex yet rewarding task. This comprehensive guide will walk you through the step-by-step process of thoroughly testing a Gree inverter board, providing you with the technical specifications and advanced details necessary to ensure a successful diagnosis.
Resistance Test
The first step in testing a Gree inverter board is to perform a resistance test. Begin by disconnecting the wiring harness from the top of the compressor. Set your multimeter to the ohms setting and measure the resistance between all terminals. Use the red lead on the N terminal and the black lead on the U, V, and W terminals. All data points should read approximately one ohm. Next, perform a continuity test by taking U, V, and W to ground separately. Each data point should display an OL or open line reading, indicating that they are not shorted to ground.
Main Board Test
Image source: Gree ac by Air Fans
With the system power turned off, measure the resistance between the following points on the main board:
– P and U
– P and V
– P and W
– N and U
– N and V
– N and W
The resistance should be above 10 kΩ with no significant differences between the readings. Additionally, perform a diode test on the main board to verify the proper readings of the bridge rectifier section. Set your multimeter to the diode mode, using the black lead on P and the red lead on U, V, and W, as well as the red lead on N and the black lead on U, V, and W. All six data points should read between 0.3 volts and 0.7 volts.
Capacitor Test
Inspect the capacitors on the main board by setting your multimeter to the capacitance setting. Touch the meter probes to the capacitor leads, and the reading should be close to the capacitor’s marked value. If the reading is significantly lower or higher, the capacitor may be faulty and in need of replacement.
Power Supply Test
Test the power supply section of the board by setting your multimeter to the DC voltage setting. Measure the voltage between the power supply input and output, and ensure that the voltage is within the specified range.
Fan Motor Test
To test the fan motor, set your multimeter to the ohms setting and measure the resistance of the fan motor windings. The resistance should be within the specified range.
Control Board Test
Finally, test the control board by checking the continuity of its components. If any component shows continuity or no continuity when it should, the component may be faulty and require replacement.
By following these detailed steps, you can thoroughly test a Gree inverter board as a DIY user with advanced hands-on expertise and technical specifications. Remember to always prioritize safety and refer to the manufacturer’s guidelines for specific instructions and safety precautions.
References:
– How to Test Gree Inverter Board
– Gree Inverter Board Troubleshooting
– Gree Inverter Board Repair