Abstract: The safety performance of electronic components has always been one of the main parts of household appliances safety assessment. For frequency conversion compressor, frequency conversion circuit board is one of the indispensable parts. However, due to the high difficulty and high risk of testing, the testing of frequency conversion circuit board is often ignored by the engineers. In order to study the safety performance of frequency conversion circuit board, according to the method in Chapter 19 of GB 4706.1 “Household and similar electrical appliances—Safety—Part 1: General requirements”, the fault testing of frequency conversion circuit of a domestic brand D compressor was carried out. The test mainly focuses on the low-power circuit judgment and short-circuit part of the fault system layout and result display. It is hoped that this study will provide reference for the safety test of compressor inverter circuit board in the future.

Key words: Compressor, Frequency conversion circuit board, Short circuit test, Low power circuit, Fault