Fault detection circuit for master control panel and refrigerator

Abstract

The invention provides a fault detection circuit for a master control panel and a refrigerator. The fault detection circuit for the master control panel comprises a detection instruction receiving module, a maintenance control panel and a load drive circuit, wherein the detection instruction receiving module is arranged on the master control panel of the refrigerator and used for receiving a fault detection instruction; the maintenance control panel is connected to the detection instruction receiving module and used for receiving a fault detection instruction from the detection instruction receiving module and sending a starting instruction or a closing instruction to the load drive circuit according to the fault detection instruction to control the work state of the load drive circuit; the load drive circuit is connected to the master control panel and the maintenance control panel, when the work state of the load drive circuit is consistent with a control result of the opening instruction or the closing instruction sent by the maintenance control panel, the master control panel is fault-free, and otherwise, the master control panel is malfunctional. With the adoption of the technical scheme, whether the mater control panel is malfunctional can be judged quickly and accurately, the phenomenon that the mater control panel is maintained and repaired blindly when the refrigerator breaks down is avoided, and the maintenance time is saved.

Description

technical field [0001] The invention relates to the technical field of refrigerators, in particular to a main control board fault detection circuit and a refrigerator. Background technique [0002] At present, when the refrigerator does not cool, the compartment light does not light up, the compressor cannot start, etc., the maintenance personnel need to analyze the refrigerator to find out the specific cause of the refrigerator failure and solve the cause of the failure. Since the main control board of the refrigerator can control the operation of each load, when the refrigerator fails, it is easy to think that there is a problem with the main control board. At present, the maintenance method of replacing the main control board is generally used to repair the refrigerator . [0003] However, there are many load driving circuits on the main control board, such as resistors, capacitors and other devices. When the main control board is replaced, it is impossible to know which...

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Problems solved by technology

[0003] However, there are many load driving circuits on the main control board, such as resistors, capacitors and other devices. When the main control board is replaced, it is impossible to know which circuit or device on the main control board has failed, which brings difficulties to the optimal design.

In addition, this maintenance method cannot accurately determine the root cause of the failure of the refrigerator. Many failures of the refrigerator (such as refrigerant leakage, poor cooling effect, etc.) cannot be manifested when the refrigerator first starts to work, and it needs to be operated for a period of time. It can only be manifested later, and these faults are probably not caused by problems with the main control board. Direct replacement of the main control board may not solve the problem or only temporarily solve the problem, resulting in these faults may reappear later

[0004] In addition, in the related art, when the refrigerator fails, each device and each driving circuit of the main control board can also be detected to determine whether there is a failure, which is time-consuming and laborious.

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