An air conditioner outdoor unit and its self-testing method and system

Abstract

This invention discloses an outdoor unit for air conditioning and its self-testing method and system, belonging to the field of air conditioning technology. During the initialization phase after the air conditioning system is powered on, the method sequentially performs verification operations on each driver board, including: controlling the current driver board under test to power on and disconnecting other driver boards; sending a name-calling command via the communication bus and receiving response data; if no response is received, a DIP switch malfunction is determined; if a response is received, its physical address is parsed and compared with a preset logical address; if they do not match, an address error is determined; if the addresses match, the corresponding compressor is started, and changes in associated sensor data are monitored. The mapping relationship is determined to be correct based on whether expected conditions are met. This invention, through independent power supply to each board and multi-level verification, can accurately identify driver board-compressor mapping errors caused by DIP switch failure, setting errors, and installation misalignment, effectively avoiding compressor misstart and damage, and significantly improving the reliability and maintainability of the outdoor unit for air conditioning.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning technology, and more specifically, relates to an air conditioner outdoor unit and its self-testing method and self-testing system. Background Technology

[0002] Currently, multi-drive board air conditioner outdoor units generally adopt a communication address allocation scheme based on DIP switches. This scheme assigns a unique communication address to each drive module by manually setting the DIP switch combination on each drive board, thereby achieving reliable communication between the main control board and multiple drive boards.

[0003] This method is simple in structure, low in cost, and easy to implement in traditional production lines. However, as a mechanical component, the DIP switch is susceptible to vibration, temperature and humidity changes, and other factors during long-term use or transportation, leading to problems such as poor contact, contact oxidation, DIP switch misalignment, or even breakage. This can cause incorrect communication address identification, resulting in serious malfunctions such as communication interruption and unit failure to start, significantly increasing after-sales maintenance rates and repair costs. More seriously, if the following operational errors occur during production or after-sales: swapping the installation positions of drive board 1 and drive board 2; or incorrectly setting the DIP switch; drive board 1 may incorrectly control compressor 2, causing the compressor to start incorrectly or operate abnormally, ultimately leading to serious damage to the outdoor unit, resulting in significant economic losses and the risk of customer complaints.

[0004] Existing technology discloses an automatic testing method for the control board of an air conditioner outdoor unit. This method employs different testing methods for different functional circuits on the outdoor unit control board, mainly including testing of communication circuits, DC fan drive circuits, sensor sampling circuits, high and low level input circuits, and low-voltage drive circuits or relay circuits. The drawback of this method is that it requires offline testing of the finished drive board using independent testing fixtures during the production process, and cannot perform online verification of the actual physical connection between the drive board and the compressor after the entire unit is installed. This results in low testing efficiency and high cost. More importantly, this method only focuses on whether the circuit function of the drive board itself is normal, and fails to identify errors in the mapping relationship between the drive board and the compressor caused by incorrect DIP switch settings, aging and failure of DIP devices, or misalignment of the drive board installation position. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an air conditioner outdoor unit and its self-testing method and system.

[0006] The present invention adopts the following technical solution.

[0007] The first aspect of the present invention provides a self-test method for an air conditioner outdoor unit, the air conditioner outdoor unit including multiple drive boards and multiple compressors corresponding one-to-one with the multiple drive boards, each drive board being provided with a DIP switch for setting its physical address, the method performing a verification operation on each drive board sequentially during the initialization phase after the air conditioning system is powered on, including: Power on the current driver board under test and power off other driver boards except the current driver board under test; The system sends a name-calling command to the current driver board under test via the communication bus and receives response data. If no response data is received from the current driver board under test within a preset time, it is determined that the DIP switch of the current driver board under test is faulty; if the response data is received from the current driver board under test within a preset time, the physical address set by its DIP switch is parsed and the physical address is compared with the preset logical address of the current driver board under test. If the physical address is inconsistent with the preset logical address, it is determined that the DIP switch setting of the current driver board under test is incorrect or the installation position is incorrect; if the physical address is consistent with the preset logical address, the current driver board under test is controlled to start its corresponding compressor. Monitor the sensor data associated with the compressor. If the change in the sensor data does not meet the expected conditions, it is determined that the current driver board under test has a mapping error fault. If the change in the sensor data meets the expected conditions, it is determined that the DIP switch setting of the current driver board under test is correct and the mapping relationship between the current driver board under test and the compressor is correct.

[0008] Optionally, the step of powering on the current driver board under test and powering off other driver boards besides the current driver board under test includes: By controlling the on / off state of the controllable switches connected in the power supply circuit of each driver board, the power-on or power-off control of the corresponding driver board can be achieved.

[0009] Optionally, the naming instruction can be sent via broadcast query or polling of a preset address range.

[0010] Optionally, the response data includes the physical address information set by the current driver board under test via a DIP switch.

[0011] Optionally, the sensor associated with the compressor is an exhaust temperature sensor; The expected conditions are: within a first preset time after the compressor starts, the temperature rise value of the exhaust temperature sensor reaches a first preset threshold, and the high-pressure side pressure of the air conditioning system increases from the initial value before the compressor starts to a second preset threshold.

[0012] A second aspect of the present invention provides an air conditioner outdoor unit self-test system for implementing the air conditioner outdoor unit self-test method described in the first aspect of the present invention, comprising: The system comprises a power-on control unit, a communication unit, an address verification unit, a startup control unit, and a mapping verification unit, wherein: The power-on control unit is used to control the power-on of the current driver board under test and to control the power-off of other driver boards except the current driver board under test during the initialization phase after the air conditioning system is powered on. The communication unit is used to send a name-calling command to the current driver board under test via the communication bus and to receive response data; The address verification unit is used to determine that the DIP switch of the current driver board under test is faulty when no response data is received from the current driver board under test within a preset time, and to parse the physical address set by the DIP switch when the response data of the current driver board under test is received. The physical address is compared with the preset logical address of the current driver board under test to determine whether the DIP switch of the current driver board under test is set incorrectly or installed in the wrong position. The startup control unit is used to control the current driver board under test to start its corresponding compressor when the physical address is consistent with the preset logical address. The mapping verification unit is used to monitor the sensor data associated with the compressor. If the change in the sensor data does not meet the expected conditions, it is determined that the current driver board under test has a mapping error fault. If the change in the sensor data meets the expected conditions, it is determined that the DIP switch setting of the current driver board under test is correct and the mapping relationship between the current driver board under test and the compressor is correct.

[0013] A third aspect of the present invention provides an outdoor unit for an air conditioner, comprising: The main control board, multiple drive boards, and multiple compressors include: The main control board is equipped with an air conditioner outdoor unit self-test system as described in the second aspect of the present invention. The main control board controls the power-on or power-off of the corresponding drive boards by controlling the on / off state of the controllable switches connected in the power supply circuit of each drive board. The plurality of compressors are connected one-to-one with the plurality of drive boards, and each drive board is used to control a corresponding compressor.

[0014] Optionally, the controllable switch is a relay.

[0015] Optionally, the outdoor unit of the air conditioner also includes multiple fan plates; The plurality of fan boards are connected one-to-one with the plurality of drive boards, and each fan board draws power from the drive board to which it is connected.

[0016] A fourth aspect of the present invention provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, when the computer program is loaded onto the processor, it implements a self-test method for an outdoor unit of an air conditioner according to a first aspect of the present invention.

[0017] The fifth aspect of the present invention provides a computer-readable storage medium storing a computer program, characterized in that, when the computer program is executed by a processor, it implements a self-test method for an outdoor unit of an air conditioner according to the first aspect of the present invention.

[0018] Compared with the prior art, the beneficial effects of the present invention include at least the following: 1. This invention achieves comprehensive detection of the DIP switch status, address setting accuracy, and physical connection relationship by sequentially powering on each driver board individually and performing communication point name, address verification, and sensor feedback verification. This solves the problem of disordered driver board-compressor mapping relationship caused by DIP switch failure, setting error, or installation misalignment, ensuring accurate execution of control logic and avoiding compressor misstart and damage.

[0019] 2. This invention achieves precise power supply control for each driver board by setting controllable switches in the power supply circuit of each driver board and controlling them independently by the main control board. This solves the problem of mutual interference when multiple driver boards work in parallel and provides a reliable hardware foundation for individual verification.

[0020] 3. This invention sends name-calling commands via broadcast query or polling and receives response data containing physical addresses, enabling rapid acquisition of the driver board communication status and DIP switch settings, thus solving the inefficiency problem of traditional methods requiring manual inspection of DIP switches.

[0021] 4. This invention establishes dual judgment conditions by monitoring the temperature change of the exhaust temperature sensor and the pressure change on the high-pressure side of the system, thus solving the problem of misjudgment by a single sensor and significantly improving the accuracy and reliability of mapping relationship verification.

[0022] 5. This invention integrates a power-on control unit, a communication unit, an address verification unit, a startup control unit, and a mapping verification unit to construct a complete self-testing system, solving the problem that existing technologies require external tooling for offline testing and realizing the online self-testing function of the entire machine.

[0023] 6. This invention solves the problem of difficulty in quickly diagnosing mapping errors after the air conditioner outdoor unit leaves the factory by configuring a self-testing system in the main control board of the air conditioner outdoor unit and setting a one-to-one correspondence between the drive board and the compressor, thereby improving the maintainability and reliability of the product.

[0024] 7. By using a relay as a controllable switch, this invention achieves simple and reliable on / off control, solving the problems of high cost and complex structure of power supply control for the drive board.

[0025] 8. This invention improves system integration by connecting the fan board to the corresponding drive board and drawing power from it.

[0026] 9. By storing the self-testing method in the form of a computer program in an electronic device, this invention solves the problem of porting the technical solution to different hardware platforms and expands the application scope of this invention.

[0027] 10. By storing the self-testing method in the form of a computer program on a readable storage medium, this invention solves the problem of dissemination and deployment of technical solutions, and facilitates upgrades and modifications to existing air conditioning products. Attached Figure Description

[0028] Figure 1 This is a flowchart of a method provided according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of an air conditioner outdoor unit provided according to an embodiment of the present invention. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this invention. The described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the spirit of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this invention.

[0030] This invention provides a self-test method for an air conditioner outdoor unit in Embodiment 1, applied to an air conditioner outdoor unit. The air conditioner outdoor unit includes a main control board, multiple drive boards, and multiple compressors corresponding one-to-one with the multiple drive boards. Each drive board is equipped with a DIP switch for setting its physical address, such as... Figure 1 As shown, this method performs a verification operation on each driver board sequentially during the initialization phase after the air conditioning system is powered on, including the following steps: Step 1: Power on the current driver board under test and power off all other driver boards except the current driver board under test.

[0031] Preferably, the step of controlling the current driver board under test to power on and controlling other driver boards besides the current driver board under test to power off includes: By controlling the on / off state of the controllable switches connected in the power supply circuit of each driver board, the power-on or power-off control of the corresponding driver board can be achieved.

[0032] It should be noted that this invention achieves precise power supply control for each driver board by setting controllable switches (such as relays) in the power supply circuits of each driver board and having them independently controlled by the main control board. This design solves the problem of mutual interference when multiple driver boards work in parallel, ensuring that only the driver board currently under test is in working condition during the self-test process. This provides a reliable hardware foundation for individual verification and also reduces system power consumption.

[0033] Furthermore, the self-test process of this invention is only performed during the initialization phase of the air conditioner outdoor unit system upon power-on, ensuring that the system completes status verification before entering normal operating mode. Before performing any drive board power-off operation, the main control board will first issue a compressor shutdown command to the drive board to ensure that the compressor has completely stopped running before controlling the corresponding relay to disconnect, thereby ensuring system safety.

[0034] Step 2: Send a name call command to the current driver board under test via the communication bus and receive response data.

[0035] Preferably, the method of sending the roll call instruction is either broadcast query or polling of a preset address range; The response data includes the physical address information set by the current driver board under test via a DIP switch.

[0036] It should be noted that this invention sends call-to-action commands via broadcast query or polling and receives response data containing physical addresses, enabling rapid acquisition of the driver board's communication status and DIP switch settings. This design solves the inefficiency of traditional methods that require manual inspection of DIP switches, and also identifies communication faults caused by poor contact or contact oxidation of DIP switches, improving the automation level of self-testing.

[0037] Step 3: If no response data is received from the current driver board under test within a preset time, it is determined that the DIP switch of the current driver board under test is faulty; if the response data is received from the current driver board under test within a preset time, the physical address set by its DIP switch is parsed and the physical address is compared with the preset logical address of the current driver board under test.

[0038] Specifically, the driver board sets its physical address via a DIP switch. Taking a two-position DIP switch as an example, four different physical addresses can be set (such as 00, 01, 10, and 11). When the main control board calls a name via the serial communication bus, the driver board includes this physical address information in its response data frame. After parsing, the main control board obtains the physical address reported by the driver board and compares it with the pre-stored logical address.

[0039] It should be noted that in serial communication, the physical address of the driver board is bound to its physical installation location in the system; while in communication methods such as CAN network, the communication address of the driver board can be dynamically assigned, but the physical address set by the DIP switch is still used to identify the driver board itself.

[0040] Step 4: If the physical address is inconsistent with the preset logical address, it is determined that the DIP switch setting of the current driver board under test is incorrect or the installation position is incorrect; if the physical address is consistent with the preset logical address, the current driver board under test is controlled to start its corresponding compressor.

[0041] Preferably, the address error fault includes at least one of the following situations: the DIP switch setting of the current driver board under test is incorrect, or the physical installation positions of the current driver board under test and other driver boards are swapped.

[0042] Specifically, when an address error is detected, the correct communication address can be reassigned to the driver board via software. For example, during the power-on initialization phase, logical addresses can be assigned to each driver board sequentially according to their physical installation order, thereby automatically correcting address errors caused by incorrect DIP switch settings or swapped positions.

[0043] Step 5: Monitor the sensor data associated with the compressor. If the change in the sensor data does not meet the expected conditions, it is determined that the current driver board under test has a mapping error fault. If the change in the sensor data meets the expected conditions, it is determined that the DIP switch setting of the current driver board under test is correct and the mapping relationship between the current driver board under test and the compressor is correct.

[0044] It should be noted that this invention achieves comprehensive detection of the DIP switch status, address setting accuracy, and physical connection relationships by sequentially powering on each driver board individually and performing communication point name, address verification, and sensor feedback verification. This design solves the problem of disordered driver board-compressor mapping relationships caused by DIP switch failure, incorrect settings, or misaligned installation, ensuring that only verified driver boards can control their corresponding compressors, thereby avoiding the risk of compressor misstart and damage caused by chaotic control logic.

[0045] Preferably, the sensor associated with the compressor is an exhaust temperature sensor; The expected conditions are: within a first preset time after the compressor starts, the temperature rise value of the exhaust temperature sensor reaches a first preset threshold, and the high-pressure side pressure of the air conditioning system increases from the initial value before the compressor starts to a second preset threshold.

[0046] It should be noted that this invention establishes a dual judgment condition by monitoring the temperature change of the exhaust temperature sensor and the pressure change on the high-pressure side of the system. This design solves the problem of misjudgment caused by environmental factors due to a single sensor. Only when both the temperature rise and pressure rise reach preset thresholds is the mapping relationship determined to be correct, significantly improving the accuracy and reliability of verification and effectively avoiding erroneous control caused by misjudgment.

[0047] For example, the expected conditions are that, 10 minutes after the compressor starts, the exhaust temperature rises by T ≥ 5°C, and the pressure value detected on the high-pressure side of the air conditioning system increases by more than 10% compared to the standby time.

[0048] Preferably, the mapping error fault includes at least one of the following situations: the output harness of the current driver board under test is connected incorrectly, or the compressor actually controlled by the current driver board under test is not the compressor logically corresponding to it.

[0049] Preferably, if a fault is determined to exist in step 3, step 4, or step 5, a fault handling operation is performed. The fault handling operations include: locking the entire machine, issuing corresponding fault code prompts, and reporting fault information to the cloud platform.

[0050] Specifically, the fault handling operation also includes: when a certain drive board is determined to have a communication fault or mapping error fault and cannot be recovered, the whole machine can be controlled to enter a degraded operation mode, that is, the faulty drive board and its corresponding compressor are shielded, and only the remaining normal drive boards and compressors are used to continue to run until the repair is completed.

[0051] Preferably, after the current driver board under test has been verified, the method further includes: The compressor corresponding to the current driver board under test is shut down and the power to the current driver board under test is cut off. Then, steps 1 to 5 are repeated for the next driver board until the self-test of all driver boards is completed. The self-test process is only performed during the initialization phase after the air conditioning system is powered on again.

[0052] It should be noted that the self-test process of this invention is only executed during the initialization phase when the air conditioner outdoor unit system is powered on again, to ensure that the system completes the mapping relationship verification before entering the normal operating mode.

[0053] In Embodiment 2, this invention provides an air conditioner outdoor unit self-test system for implementing the air conditioner outdoor unit self-test method described in Embodiment 1, comprising: The system comprises a power-on control unit, a communication unit, an address verification unit, a startup control unit, and a mapping verification unit, wherein: The power-on control unit is used to control the power-on of the current driver board under test and to control the power-off of other driver boards except the current driver board under test during the initialization phase after the air conditioning system is powered on. The communication unit is used to send a name-calling command to the current driver board under test via the communication bus and to receive response data; The address verification unit is used to determine that the DIP switch of the current driver board under test is faulty when no response data is received from the current driver board under test within a preset time, and to parse the physical address set by the DIP switch when the response data of the current driver board under test is received. The physical address is compared with the preset logical address of the current driver board under test to determine whether the DIP switch of the current driver board under test is set incorrectly or installed in the wrong position. The startup control unit is used to control the current driver board under test to start its corresponding compressor when the physical address is consistent with the preset logical address. The mapping verification unit is used to monitor the sensor data associated with the compressor. If the change in the sensor data does not meet the expected conditions, it is determined that the current driver board under test has a mapping error fault. If the change in the sensor data meets the expected conditions, it is determined that the DIP switch setting of the current driver board under test is correct and the mapping relationship between the current driver board under test and the compressor is correct.

[0054] In Embodiment 3, the present invention provides an outdoor unit for an air conditioner, comprising: The main control board, multiple drive boards, and multiple compressors include: The main control board is equipped with an air conditioner outdoor unit self-test system as described in Embodiment 2. The main control board is connected to the power supply circuit of each drive board through multiple controllable switches to realize the power-on or power-off control of the corresponding drive board. The plurality of compressors are connected one-to-one with the plurality of drive boards, and each drive board is used to control a corresponding compressor.

[0055] Preferably, the outdoor unit of the air conditioner further includes multiple fan plates; The plurality of fan boards are connected one-to-one with the plurality of drive boards, and each fan board draws power from the drive board to which it is connected.

[0056] Preferably, the controllable switch is a relay.

[0057] For example, such as Figure 2As shown, the outdoor unit of the air conditioner includes a main control board, relay 1, relay 2, drive board 1, drive board 2, fan board 1, and fan board 2. The main control board controls the opening and closing of relay 1 and relay 2 through control signal 1 and control signal 2, respectively. Relay 1 is connected in series in the power supply circuit of drive board 1, and relay 2 is connected in series in the power supply circuit of drive board 2. Drive board 1 supplies power to fan board 1, and drive board 2 supplies power to fan board 2. By independently controlling the on and off of the relays, the main control board can individually power on and off each drive board.

[0058] Embodiment 4 of the present invention provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the computer program is loaded onto the processor, it implements a self-test method for an outdoor unit of an air conditioner as described in Embodiment 1.

[0059] Embodiment 5 of the present invention provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements a self-test method for an outdoor unit of an air conditioner according to Embodiment 1.

[0060] This invention provides an application example of an air conditioner outdoor unit self-test method in Embodiment 6, based on the air conditioner outdoor unit self-test method described in Embodiment 1 and the air conditioner outdoor unit described in Embodiment 3, including the following steps: Step 1: Power on the system and initialize the self-test process.

[0061] The main control board records the number N of driver boards configured in the system (N=2 in this example) and sets the current self-retrieval index i=1.

[0062] Step 2: Control the i-th driver board to enter the test state.

[0063] The main control board controls relay i to close, powering on the i-th driver board; at the same time, it controls all other relays (j≠i) to open, ensuring that only the i-th driver board is currently in a communicable and working state.

[0064] Step 3: Obtain the communication point name and address.

[0065] The main control board sends naming commands to the currently online driver boards via a serial communication bus. The naming method can be either broadcast query or polling of a preset address range.

[0066] Upon receiving a roll call command, a normal i-th driver board will reply with a response data frame according to the communication protocol. This data frame contains the physical address information set by its DIP switch. The main control board parses this response data to obtain the physical address reported by the currently online driver boards.

[0067] Step 4: Diagnose communication faults.

[0068] The main control board waits for a preset time. If no valid response is received, it is determined that the i-th driver board has a communication failure (for example, it may be due to poor contact of the DIP switch or damage to the driver board, resulting in no response). The fault information is recorded, and step 7 is executed.

[0069] Step 5: Address logic verification and compressor start-up test.

[0070] If a valid response is received, the main control board will compare the parsed physical address with the preset logical address that the i-th driver board should have, which is stored in the system. If the physical address does not match the preset logical address, it is determined to be an address error fault, which may be due to incorrect DIP switch settings or swapped physical installation positions, and proceed to step 7; If the addresses match, proceed to the next step of physical mapping verification: the main control board sends a start command to the driver board, instructing it to control the logically corresponding i-th compressor to start running.

[0071] Step 6: Sensor feedback verification.

[0072] After the i-th compressor starts, the main control board monitors the data changes of the sensors associated with the i-th compressor (preferably the exhaust temperature sensor) in real time.

[0073] The sensor feedback judgment logic is as follows: If, within a preset monitoring time window after the compressor starts, a significant and expected change is detected in the sensor reading relative to the initial value before startup (for example, 10 minutes after the compressor starts, the exhaust temperature rises by ΔT ≥ 5℃, and the system high-pressure side pressure increases by more than 10% compared to standby), it is determined that the i-th drive board not only has the correct logical address, but also physically connects to and controls the i-th compressor, that is, the mapping relationship between the drive board and the compressor is correct, and the self-test passes. If the sensor data shows no significant change or changes abnormally, a mapping error fault is identified. Although the driver board's logical address is correct, its physical output is not connected to the i-th compressor it should be controlling (for example, it may be controlling another compressor due to incorrect wiring). Record the fault information and proceed to step 7.

[0074] Step 7: Troubleshooting and Recording.

[0075] For any fault detected in step 4, step 5 or step 6, the main control board immediately performs protective operations, including locking the machine, automatically reporting fault information and arranging maintenance.

[0076] Step 8: The current driver board has completed its self-test and is ready for the next round.

[0077] The main control board controls the relay i to disconnect, the i-th driver board to power down, and sets i = i + 1.

[0078] Step 9: Loop through the conditions.

[0079] If i ≤ N, return to step 2 and perform a self-test on the next driver board. If all driver boards pass the self-test, the process ends and the system enters standby or normal operation mode.

[0080] It should be noted that the self-test process of this invention is only performed during the initialization phase of the air conditioner outdoor unit system upon power-on, to ensure that the system completes status verification before entering normal operating mode. Before performing any drive board power-off operation, the main control board will first send a compressor shutdown command to the drive board to ensure that the compressor has completely stopped running before controlling the corresponding relay to disconnect, thereby ensuring system safety.

[0081] Furthermore, to verify the effectiveness of the self-testing method of the present invention, its technical effect can be demonstrated through the following two typical fault simulation tests: DIP switch resetting test: Set the DIP switches of any two driver boards to the same physical address. After the system powers on, the main control board performs a self-test on each driver board sequentially. When it detects that the physical address reported by the driver board is inconsistent with the preset logical address (due to logical confusion caused by address duplication), an address error fault is determined to exist. The unit then executes fault handling operations and waits for maintenance personnel to handle the situation.

[0082] Driver board position swapping test: The physical mounting positions of the two driver boards are swapped, but the DIP switch settings on each driver board remain unchanged. During system power-on self-test, the main control board supplies power to the first driver board under test (which is actually installed in the physical location of the second driver board). It retrieves the reported physical address (still set by its DIP switch) by name, which matches the logical address of the first driver board pre-stored on the main control board; therefore, the address verification passes. The main control board then instructs this driver board to start its logically corresponding first compressor. However, because the actual mounting position of this driver board has changed, its output wiring harness is connected to the second compressor. Therefore, the second compressor starts, but the first compressor does not respond. The main control board monitors the sensor data associated with the first compressor and finds no significant changes, determining that a mapping error fault exists and immediately executing fault handling operations.

[0083] The above test examples demonstrate that the method of the present invention can effectively identify problems caused by incorrect DIP switch settings, reversed installation positions, or incorrect wiring harness connections, and take corresponding fault handling measures to avoid damage to the unit.

[0084] This disclosure can be a system, method, and / or computer program product. A computer program product may include a computer-readable storage medium having computer-readable program instructions loaded thereon for causing a processor to implement various aspects of this disclosure.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the protection scope of the claims of the present invention.

Claims

1. A self-test method for an air conditioner outdoor unit, wherein the air conditioner outdoor unit includes multiple drive boards and multiple compressors corresponding one-to-one with the multiple drive boards, each drive board is provided with a DIP switch for setting its physical address, characterized in that, This method performs verification operations on each driver board sequentially during the initialization phase after the air conditioning system is powered on, including: Power on the current driver board under test and power off other driver boards except the current driver board under test; The system sends a name-calling command to the current driver board under test via the communication bus and receives response data. If no response data is received from the current driver board under test within a preset time, it is determined that the DIP switch of the current driver board under test is faulty; if the response data is received from the current driver board under test within a preset time, the physical address set by its DIP switch is parsed and the physical address is compared with the preset logical address of the current driver board under test. If the physical address is inconsistent with the preset logical address, it is determined that the DIP switch setting of the current driver board under test is incorrect or the installation position is incorrect; if the physical address is consistent with the preset logical address, the current driver board under test is controlled to start its corresponding compressor. Monitor the sensor data associated with the compressor. If the change in the sensor data does not meet the expected conditions, it is determined that the current driver board under test has a mapping error fault. If the change in the sensor data meets the expected conditions, it is determined that the DIP switch setting of the current driver board under test is correct and the mapping relationship between the current driver board under test and the compressor is correct.

2. The self-test method for an air conditioner outdoor unit according to claim 1, characterized in that: The step of controlling the current driver board under test to power on and controlling the other driver boards except the current driver board under test to power off includes: By controlling the on / off state of the controllable switches connected in the power supply circuit of each driver board, the power-on or power-off control of the corresponding driver board can be achieved.

3. The self-test method for an air conditioner outdoor unit according to claim 1, characterized in that: The call-out command is sent via broadcast query or polling of a preset address range.

4. The self-test method for an air conditioner outdoor unit according to claim 1, characterized in that: The response data includes the physical address information set by the current driver board under test via a DIP switch.

5. The self-test method for an air conditioner outdoor unit according to claim 1, characterized in that: The sensor associated with the compressor is an exhaust temperature sensor; The expected conditions are: within a first preset time after the compressor starts, the temperature rise value of the exhaust temperature sensor reaches a first preset threshold, and the high-pressure side pressure of the air conditioning system increases from the initial value before the compressor starts to a second preset threshold.

6. An air conditioner outdoor unit self-test system, used to implement the air conditioner outdoor unit self-test method according to any one of claims 1-5, characterized in that, include: The system comprises a power-on control unit, a communication unit, an address verification unit, a startup control unit, and a mapping verification unit, wherein: The power-on control unit is used to control the power-on of the current driver board under test and to control the power-off of other driver boards except the current driver board under test during the initialization phase after the air conditioning system is powered on. The communication unit is used to send a name-calling command to the current driver board under test via the communication bus and to receive response data; The address verification unit is used to determine that the DIP switch of the current driver board under test is faulty when no response data is received from the current driver board under test within a preset time, and to parse the physical address set by the DIP switch when the response data of the current driver board under test is received. The physical address is compared with the preset logical address of the current driver board under test to determine whether the DIP switch of the current driver board under test is set incorrectly or installed in the wrong position. The startup control unit is used to control the current driver board under test to start its corresponding compressor when the physical address is consistent with the preset logical address. The mapping verification unit is used to monitor the sensor data associated with the compressor. If the change in the sensor data does not meet the expected conditions, it is determined that the current driver board under test has a mapping error fault. If the change in the sensor data meets the expected conditions, it is determined that the DIP switch setting of the current driver board under test is correct and the mapping relationship between the current driver board under test and the compressor is correct.

7. An outdoor unit for an air conditioner, characterized in that, include: The main control board, multiple drive boards, and multiple compressors include: The main control board is equipped with an air conditioner outdoor unit self-test system as described in claim 6. The main control board controls the power-on or power-off of the corresponding drive board by controlling the on / off of the controllable switches connected in the power supply circuit of each drive board. The plurality of compressors are connected one-to-one with the plurality of drive boards, and each drive board is used to control a corresponding compressor.

8. An air conditioner outdoor unit according to claim 7, characterized in that: The controllable switch is a relay.

9. An air conditioner outdoor unit according to claim 7, characterized in that: The outdoor unit of the air conditioner also includes multiple fan plates; The plurality of fan boards are connected one-to-one with the plurality of drive boards, and each fan board draws power from the drive board to which it is connected.

10. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the computer program is loaded into the processor, it implements a self-test method for an air conditioner outdoor unit according to any one of claims 1-5.

11. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements a self-test method for an air conditioner outdoor unit according to any one of claims 1-5.

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