The invention discloses a method for judging the
refrigerant leakage of an air-conditioner, comprising following steps of: a. recording the temperature T of an indoor
pipe coil before starting a compressor; b. judging whether the compressor is started or not, if so, conducting the next step, if not, returning to the step a; c. judging whether the compressor keeps running for x minutes, if so, conducting the next step, if not, returning to the step b; d. recording the temperature T' of the indoor
pipe coil when the compressor keeps running for x minutes and recording indoor temperature Tr simultaneously; e. calculating
temperature difference between the temperature T' of the indoor
pipe coil when the compressor keeps running for x minutes and the temperature T of the indoor pipe coil before starting the compressor, calculating the
temperature difference between the temperature T' of the indoor pipe coil when the compressor keeps running for x minutes and the indoor temperature Tr recorded simultaneously, to see whether the
two temperature differences are less than y, if so, conducting step f, if not, then clearing the
running time of the compressor and returning to the step b; and f. shutting down to report faults. The method for judging
refrigerant leakage in the air-conditioner has high accuracy.