Fault detection circuit and method and air conditioning equipment

Abstract

The invention discloses a fault detection circuit and method and air conditioning equipment. The fault detection circuit comprises a signal input module which is respectively connected with a control chip, an input voltage source of a liquid level switch, a first terminal of the liquid level switch and a second terminal of the liquid level switch; the signal input module is used for receiving a detection signal sent by the control chip after the control chip monitors that the air conditioning equipment is full of water; the input end of the signal detection module is connected between the signal input module and the second terminal of the liquid level switch, and the output end of the signal detection module outputs a corresponding characterization signal according to the detection signal so as to characterize whether the mainboard of the air conditioning equipment is abnormal or not and the abnormal type of the abnormality. Through the method and the device, whether the fault reason is the mainboard abnormity of the air conditioning equipment or not can be judged after the water-full fault occurs, so that the fault reason can be quickly determined, and the fault maintenance efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of units, in particular to a fault detection circuit, a method and an air conditioning device. Background technique [0002] The current air conditioning equipment (such as air conditioners, dehumidifiers, etc.) sometimes encounters a water full failure when in use. The water full fault generally has a corresponding fault code, but the reasons for the water full fault are generally as follows: 1. The main board circuit is abnormal; 2. The water pump or liquid level switch is abnormal; 3. The drainage capacity of the unit is insufficient. Maintenance personnel cannot determine the specific cause of the water full failure through the fault code, and thus cannot make predictions in advance. [0003] For the air-conditioning equipment in the prior art that cannot determine the specific cause of the water full failure through the fault code, no effective solution has been proposed so far. SUMMARY OF THE INVENT...

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide a fault detection circuit, method, and air conditioning equipment. The air conditioning equipment cannot judge the specific cause of the water full fault through the fault code.

Images