Multi-connection system fault detection method, device, multi-connection system and air conditioning system

Abstract

The invention relates to the field of failure detection and discloses a multi-on-line system failure detection method and device, a multi-on-line system (MS) and an air-conditioning system. The method comprises the steps of judging that a power failure occurs to the MS, recording the frequency of power failures of the MS within a preset time interval and determining the unstable power supply failure of the MS when the frequency of the power failures exceeds a preset frequency. Through the technical scheme, the frequency of power failures of the MS within the preset time interval is recorded; when the frequency of the power failures exceeds the preset frequency, the unstable power supply failure of the MS is determined; and accordingly, the unstable power supply failure on the power supply side can be effectively detected.

Description

technical field [0001] The present invention relates to the field of fault detection, in particular to a multi-connection system fault detection method and device, a multi-connection system and an air-conditioning system. Background technique [0002] A multi-connected air conditioning system refers to a primary refrigerant air conditioning system in which one outdoor unit is connected to two or more indoor units through piping, and the outdoor side adopts air-cooled heat exchange and the indoor side adopts direct evaporative heat exchange. [0003] For buildings with multi-split air conditioning systems, there are often situations where there are both cooling and heating loads. The main equipment MS (multi-split system) in the multi-split air conditioning system includes multiple valve bodies and components such as cooling solenoid valve, heating solenoid valve, electronic expansion valve, etc., and the structure is very complicated. There are many reasons for MS faults. A...

AI Technical Summary

Problems solved by technology

The main equipment MS (multi-connected system) in the multi-connected air conditioning system includes multiple valve bodies and components such as cooling solenoid valve, heating solenoid valve, electronic expansion valve, etc., and the structure is very complicated.

There are many reasons for MS faults. Among them, if the power supply to MS is unstable, it will cause unstable system operation, and such faults are generally difficult to detect. It will consume more manpower and cost in the detection of general methods, which increases the Difficulty and complexity of system control

[0004] For the above technical problems, there is no good solution in the prior art

Images