1. A method for operating a plant for synthesizing methanol, a synthesis gas flow comprising hydrogen and carbon oxides being supplied to a synthesis gas compressor of the plant to increase the pressure of the synthesis gas flow, the pressure-increased synthesis gas flow being supplied to a methanol reactor arrangement of the plant for partial conversion to methanol and the plant having a hydrogen recovery arrangement which obtains an H-recycling flow comprising hydrogen from a recovery flow supplied from the methanol reactor arrangement, which hydrogen is converted at least in part to methanol, wherein upon failure of the synthesis gas compressor, the synthesis gas flow continues to be supplied to the methanol reactor arrangement for partial conversion to methanol and that, following failure of the synthesis gas compressor, a line arrangement of the plant is switched such that the H-recycling flow is adjusted to compensate for a pressure loss in the methanol reactor arrangement.