A diagnostic method and diagnostic system for connecting wires of internal and external units of a fixed-frequency air conditioner
A diagnostic method and connection line technology, applied in the direction of measuring devices, instruments, measuring electricity, etc., can solve problems such as the inability to find wrong connection of signal lines in time, achieve convenient reconnection, prevent quality problems and after-sales problems, and ensure normal status Effect
Active Publication Date: 2017-01-18
GREE ELECTRIC APPLIANCES INC
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[0003] In view of this, the present invention provides a diagnostic method and diagnostic system for the wrong connection of the connection wires of the internal and external units of the fixed-frequency air conditioner, so as to solve the problem that the existing technology cannot find the wrong connection of the signal wires in time, so as to ensure that the fixed-frequency air conditioner operates in a normal state , to prevent quality problems and after-sales problems caused by wrong wiring of signal lines
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[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0045] The embodiment of the present invention discloses a diagnostic method and system for diagnosing wrong connections of internal and external units of a fixed-frequency air conditioner, in order to solve the problem that the existing technology cannot detect wrong connection of signal lines in time, thereby ensuring that the fixed-frequency air conditioner operates in a normal state , to prevent quality problems and after-sales problems caused by wrong wiring of...
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The invention provides a diagnostic method and a diagnostic system for mistaken line connection of indoor and outdoor units of fixed frequency air conditioners. The method comprises the steps of: detecting the temperature difference value of an indoor pipe before and behind entering each operation mode for a preset time period, when the fixed frequency air conditioner is in a cooling mode, a heating mode or an external fan operating mode, comparing the temperature difference values with preset temperature difference values to determine whether signal lines are mistakenly connected, and meanwhile diagnosing the mistakenly connected signal line; and therefore, a user is convenient to reconnect the line, the fixed frequency air conditioner is ensured to operate in a normal state, and quality and after-sale problems caused by mistaken connection of the signal lines can be avoided.
Description
technical field [0001] The present invention relates to the technical field of fixed-frequency air conditioners, and more specifically, to a diagnostic method and system for wrong connection of connecting wires of internal and external units of fixed-frequency air conditioners. Background technique [0002] The connection wires of the internal and external units of the fixed-frequency air conditioner are divided into power wires (live wire and neutral wire) and signal wires (compressor wires, four-way valve wires and external fan wires). Fixed-frequency air conditioners often have wrong connections after sales. Among them, The power line and the signal line are connected incorrectly, and the internal unit controller of the fixed-frequency air conditioner does not respond after being powered on. Therefore, it is easier to diagnose this wrong connection; and when the signal lines are connected incorrectly, the fixed-frequency air conditioner can often still operate. Therefore, ...
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IPC IPC(8): G01R31/02
Inventor 曾春亮张辉宋德超刘畅华洪香王铭坤陈志强
Owner GREE ELECTRIC APPLIANCES INC