CN115789859A - Air conditioner fault diagnosis method, terminal and system - Google Patents
Air conditioner fault diagnosis method, terminal and system Download PDFInfo
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Abstract
The invention discloses an air conditioner fault diagnosis method, terminal and system. The method is applied to an air conditioner fault diagnosis terminal, the air conditioner fault diagnosis terminal is connected to an air conditioner, and the method comprises the following steps: after the air conditioner is powered on, performing function detection on each load in the air conditioner one by one; if the load function is detected to be abnormal, determining the type of the abnormal load; and determining the load fault or the controller fault by adopting a diagnosis mode corresponding to the type. According to the invention, the air conditioner fault diagnosis terminal is utilized, the mode of opening the load is adopted, the function self-check is carried out on the air conditioner load one by one, the mutual influence among all functional components is prevented, the fault positioning accuracy is improved, then the controller and the load are further accurately identified according to the load type with abnormal functions, the fault component is accurately positioned, the functional module is prevented from being replaced by mistake, the fault diagnosis efficiency is improved, and the after-sale cost and the difficulty of after-sale troubleshooting are reduced.
Description
Technical Field
The invention relates to the technical field of fault diagnosis, in particular to an air conditioner fault diagnosis method, terminal and system.
Background
With the acceleration of modern life rhythm, in order to realize quick maintenance service, modern air conditioner maintenance has been upgraded from traditional fault point maintenance to trouble part maintenance, how to fix a position trouble part fast accurately is the requirement of high-efficient service, also is the key of after-sale cost management and control.
In the actual after-sale maintenance process, abnormal electronic components on the mainboard are not easy to be found, such as the fracture of a chip capacitor, the abnormal resistance of a chip resistor and the like, so that the circuit board fault or the load end fault can not be directly judged, the functional parts which work normally are mistakenly replaced due to inaccurate fault positioning, the after-sale cost is increased, the maintenance frequency can be increased, and the brand image is damaged.
Aiming at the problem of how to accurately position the air conditioner fault in the prior art, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides an air conditioner fault diagnosis method, terminal and system, which are used for at least solving the problem of accurately positioning air conditioner faults in the prior art.
In order to solve the technical problem, an embodiment of the present invention provides an air conditioner fault diagnosis method, which is applied to an air conditioner fault diagnosis terminal, where the air conditioner fault diagnosis terminal is connected to an air conditioner, and the method includes:
after the air conditioner is powered on, performing function detection on each load in the air conditioner one by one;
if the load function is detected to be abnormal, determining the type of the abnormal load;
and determining the load fault or the controller fault by adopting a diagnosis mode corresponding to the type.
Optionally, performing function detection on each load in the air conditioner one by one, includes:
aiming at an output type load, sending a control instruction to the output type load, and if the output type load does not execute the control instruction, determining that the output type load is abnormal in function;
and aiming at the input type load, obtaining a parameter value detected by the input type load, comparing the parameter value with a reference value, and determining that the input type load has abnormal function if the deviation of the parameter value and the reference value meets a preset condition.
Optionally, determining a load fault or a controller fault by using a diagnosis mode corresponding to the type includes:
when the type of the abnormal load is an output type load, measuring a loop current between the controller and the abnormal load, then disconnecting the controller from the abnormal load, and measuring a voltage output by a load interface of the controller, wherein the load interface is used for connecting the abnormal load;
if the voltage is not matched with the preset power supply voltage of the abnormal load, determining that the controller is in fault;
and if the voltage is matched with the preset power supply voltage of the abnormal load, but the loop current is not matched with a specified current value, determining that the abnormal load has a fault.
Optionally, determining a load fault or a controller fault by using a diagnosis manner corresponding to the type includes:
under the condition that the type of the abnormal load is an input type load, disconnecting the controller from the abnormal load, and simulating the abnormal load to send a first specified signal to the controller by utilizing a load simulation function of the air conditioner fault diagnosis terminal;
receiving a second specified signal returned by the controller, wherein the controller returns the received first specified signal to the air conditioner fault diagnosis terminal;
judging whether the first specified signal is the same as the second specified signal;
if the abnormal load faults are the same, determining the abnormal load faults;
and if the difference is not the same, determining that the controller is in fault.
Optionally, performing function detection on each load in the air conditioner one by one, includes:
acquiring the number of each load in the air conditioner;
carrying out function detection on each load one by one according to the serial numbers;
the number of abnormal loads is recorded.
Optionally, after determining a load fault or a controller fault by using the diagnosis manner corresponding to the type, the method further includes: and outputting fault prompt information.
The embodiment of the invention also provides an air conditioner fault diagnosis terminal, which is connected to the air conditioner and comprises:
the detection module is used for carrying out function detection on each load in the air conditioner one by one after the air conditioner is powered on;
the first determining module is used for determining the type of an abnormal load if the load function abnormality is detected;
and the second determining module is used for determining the load fault or the controller fault by adopting the diagnosis mode corresponding to the type.
The embodiment of the invention also provides an air conditioner fault diagnosis system, which comprises: the embodiment of the invention relates to an air conditioner fault diagnosis terminal.
An embodiment of the present invention further provides a computer device, including: the device comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the computer program to realize the steps of the method of the embodiment of the invention.
Embodiments of the present invention also provide a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the method according to the embodiments of the present invention.
By applying the technical scheme of the invention, the air conditioner fault diagnosis terminal is connected to the air conditioner, after the air conditioner is powered on, the function of each load in the air conditioner is detected one by one, and if the load function is detected to be abnormal, the load fault or the controller fault is determined by adopting a diagnosis mode corresponding to the type of the abnormal load. The air conditioner fault diagnosis terminal is utilized, an open load mode is adopted, function automatic detection is carried out on air conditioner loads one by one, mutual influence among all functional components is prevented, the fault positioning accuracy is improved, then the controller and the loads are further accurately identified according to the load types with abnormal functions, the fault components are quickly and accurately positioned, the problem that functional modules are mistakenly replaced is avoided, the fault diagnosis efficiency is improved, the after-sale cost and the difficulty of after-sale troubleshooting are reduced, the maintenance frequency is reduced, and the brand image is improved. In addition, detection and diagnosis can be realized based on the existing circuit, additional circuit design is not needed, and additional cost is not increased.
Drawings
Fig. 1 is a flowchart of an air conditioner fault diagnosis method according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of fault diagnosis of an air conditioner according to a second embodiment of the present invention;
fig. 3 is a block diagram of a structure of an air conditioner fault diagnosis terminal according to a third embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than here.
An alternative embodiment of the present invention is described in detail below with reference to the drawings.
Example one
The embodiment provides an air conditioner fault diagnosis method which is applied to an air conditioner fault diagnosis terminal, wherein the air conditioner fault diagnosis terminal CAN be operated by after-sales personnel, is connected to an air conditioner, and CAN be specifically connected with the air conditioner through an existing communication interface of the air conditioner, for example, a CAN bus and the like. The air conditioner fault diagnosis terminal is provided with interactive elements (such as a display screen and/or keys) for being viewed and operated by after-sales personnel. The air conditioner fault diagnosis terminal is connected with the air conditioner, and fault diagnosis can be started after the air conditioner is powered on.
Fig. 1 is a flowchart of an air conditioner fault diagnosis method according to an embodiment of the present invention, and as shown in fig. 1, the method includes the following steps:
and S101, after the air conditioner is powered on, performing function detection on each load in the air conditioner one by one.
S102, if the load function abnormity is detected, the type of the abnormal load is determined.
And S103, determining the load fault or the controller fault by adopting a diagnosis mode corresponding to the type.
The load in the air conditioner includes at least: a fan, a compressor, an electronic expansion valve, a temperature sensor, a humidity sensor, a pressure sensor and the like. The load is connected with a controller (main board), and the types of the load comprise: the input type load refers to information input by the load to the controller, that is, the controller obtains a parameter value collected or detected by the load, for example, a sensor inputs the detected parameter value to the controller; the output type load is a load that receives a control command output from the controller and operates according to the control command, that is, the controller outputs a control command to the load to control the load operation, for example, a fan, a compressor, and an electronic expansion valve.
Each load needs to complete a corresponding function, for example, the fan is used for opening and closing according to a control instruction or rotating according to a rotating speed indicated by the control instruction, the compressor is used for opening and closing according to the control instruction or operating according to a frequency indicated by the control instruction, and the temperature sensor is used for detecting temperature. If the abnormal function of the load is detected, the abnormal function of the load cannot be completed successfully, and the abnormal function can be caused by the failure of the controller or the failure of the load. According to the embodiment, corresponding diagnosis modes are set for different load types, and the fault component can be rapidly and accurately identified.
In the embodiment, a mode of opening the load is adopted, the single load is subjected to parameter acquisition and control, the running state of the load is not limited by the internal logic of the air conditioner any more, and related actions can be directly executed according to the instruction of the air conditioner fault diagnosis terminal.
In this embodiment, the air conditioner fault diagnosis terminal is connected to the air conditioner, after the air conditioner is powered on, the function of each load in the air conditioner is detected one by one, and if the load function is detected to be abnormal, the diagnosis mode corresponding to the type of the abnormal load is adopted to determine the load fault or the controller fault. The air conditioner fault diagnosis terminal is utilized, a mode of opening load is adopted, function automatic detection is carried out on air conditioner loads one by one, mutual influence among all functional components is prevented, the fault location accuracy is improved, then accurate identification is further carried out on a controller and the loads according to the load types with abnormal functions, the fault components are rapidly and accurately located, the problem that the functional modules are replaced by mistake is avoided, the fault diagnosis efficiency is improved, the after-sale cost and the difficulty of after-sale troubleshooting are reduced, the maintenance frequency is reduced, and the brand image is improved. In addition, detection and diagnosis can be realized based on the existing circuit, additional circuit design is not needed, and additional cost is not increased.
The whole fault diagnosis process is finished by the air conditioner fault diagnosis terminal, and quick and accurate fault positioning can be realized without real-time operation of after-sales personnel, so that the condition that the after-sales personnel do not operate well due to the installation position of the air conditioner or the weather condition is avoided, and the after-sales work efficiency and the comfort are improved.
In one embodiment, the function detection of each load in an air conditioner individually comprises:
aiming at an output type load, sending a control instruction to the output type load, and if the output type load does not execute the control instruction, determining that the output type load is abnormal in function;
and aiming at the input type load, obtaining a parameter value detected by the input type load, comparing the parameter value with a reference value, and determining that the input type load has abnormal function if the deviation of the parameter value and the reference value meets a preset condition.
The reference value may be a value detected by the air conditioner fault diagnosis terminal by using a sensor thereof (for example, the air conditioner fault diagnosis terminal is also provided with a temperature sensor for detecting an indoor temperature), may also be a value obtained from another channel (for example, obtaining an outdoor temperature from a weather server), may also be a historical value of the operation of the air conditioner (for example, a condensation temperature, an evaporation temperature, a high pressure, a low pressure and the like corresponding to the air conditioner in some states), and may also be a preset standard value or a preset standard range. And if the difference between the parameter value and the reference value is large or the parameter value exceeds the range of the reference value, the preset condition is considered to be met, and the load function is abnormal.
By the mode, the function self-checking of each load of the air conditioner can be completed quickly, the functional components are prevented from being influenced mutually, and the accuracy of fault positioning is improved.
Specifically, the function detection of each load in the air conditioner one by one includes: acquiring the number of each load in the air conditioner; carrying out function detection on each load one by one according to the serial numbers; the number of abnormal loads is recorded. The air conditioner fault diagnosis terminal can pre-store the corresponding relation among the air conditioner model, the load name and the load number, and when the air conditioner fault diagnosis terminal is used for fault diagnosis, the load number is automatically read according to the connected air conditioner model, so that manual operation of after-sales personnel is reduced. According to the embodiment, the functions of the loads are detected one by one according to the load numbers, so that omission is avoided, and the fault diagnosis result is reliable and accurate.
Illustratively, the loads are self-checked one by one according to the sequence of 1, 2, 3, 8230, 8230N, if the Mth load is detected to be abnormal in the first round (1 is less than or equal to M and less than N), the detection is stopped, and the number of the abnormal load is stored in a memory chip; a second round of testing is then performed starting with the first load and skipping the loads that have been tested and stored as abnormal, and so on until all loads have been tested. Such multiple rounds of detection can improve the accuracy of detection.
In one embodiment, determining a load fault or a controller fault by using a diagnosis mode corresponding to the type includes:
(1) Under the condition that the type of the abnormal load is an output type load, measuring loop current between a controller and the abnormal load, then disconnecting the controller from the abnormal load, and measuring voltage output by a load interface of the controller, wherein the load interface is used for connecting the abnormal load; if the voltage is not matched with the preset power supply voltage of the abnormal load, determining that the controller fails; and if the voltage is matched with the preset power supply voltage of the abnormal load, but the loop current is not matched with the specified current value, determining that the abnormal load has a fault.
If the voltage is too much different from the preset power supply voltage of the abnormal load or exceeds the range, the voltage and the preset power supply voltage are considered to be not matched, and the voltage is abnormal; and if the voltage is not much different from the preset power supply voltage of the abnormal load or is within the range, the voltage and the preset power supply voltage are considered to be matched, and the voltage is normal.
The specified current value may be calculated by dividing the rated power by the supply voltage in the case where the load is normally operated. If the difference between the loop current and the specified current value is too much, the loop current and the specified current value are considered to be not matched, and the loop current is abnormal. If the voltage is normal but the loop current is abnormal, indicating that the load impedance has changed, a load fault may be determined.
The method can quickly and accurately locate the controller fault or the load fault aiming at the output type load.
By using the air conditioner fault diagnosis terminal, the loop current between the controller and the abnormal load is measured under the condition that the controller is connected with the abnormal load, and the voltage output by a load interface of the controller at the moment can also be measured. If the load fails, the measured voltages are different in both the case of connecting the load and the case of disconnecting the load, which can be used as an auxiliary judgment condition.
(2) Under the condition that the type of the abnormal load is an input load, disconnecting the controller from the abnormal load, and simulating the abnormal load to send a first specified signal to the controller by utilizing the load simulation function of the air conditioner fault diagnosis terminal; receiving a second specified signal returned by the controller, wherein the controller returns the received first specified signal to the air conditioner fault diagnosis terminal; judging whether the first specified signal is the same as the second specified signal; if the abnormal load is the same as the abnormal load, determining the abnormal load fault; if the difference indicates that the signal transmission circuit has a problem, determining that the controller has a fault.
The method can quickly and accurately locate the controller fault or the load fault aiming at the input type load.
After the load fault or the controller fault is determined by adopting the diagnosis mode corresponding to the type, the method further comprises the following steps: and outputting fault prompt information. Therefore, specific fault parts of after-sales personnel can be prompted in time, and timely replacement and maintenance are facilitated.
The air conditioner fault diagnosis terminal that can fix a position the trouble fast of this embodiment can be hand-held type, makes things convenient for after-sales personnel to carry. The air conditioner fault diagnosis terminal mainly has the functions of displaying, storing, instruction inputting, load controlling, load simulating and the like, and also comprises a communication circuit capable of communicating with the controller.
Example two
The air conditioner fault diagnosis method is described below with reference to a specific embodiment, but it should be noted that the specific embodiment is only for better describing the present application and is not to be construed as a limitation to the present application. The same or corresponding terms as those in the above embodiments are explained, and the description thereof is omitted.
As shown in fig. 2, the method comprises the following steps:
and S201, powering on the air conditioning unit.
S202, setting whether the load is self-checked or not through the handheld diagnosis terminal, if not, entering S216, and if so, entering S203.
S203, in order to quickly identify the loads, the handheld diagnosis terminal can be used for sequencing numbers 1, 2 and 3 \8230Nof the loads in the unit, and the load numbers are stored in a memory chip of the handheld diagnosis terminal.
And S204, judging whether the load is abnormal in function through self-checking, if not, entering S217, and if so, entering S205.
S205, record the number M of the abnormal load.
Specifically, the loads are self-checked one by one according to the set sequence of 1, 2 and 3 \ 8230N, if the M-th load is detected to be abnormal in the first round (M is more than or equal to 1 and less than N), the detection is stopped, and the serial number of the abnormal load is stored in a memory chip; then, starting with the first load, a second round of testing is performed, and the system will skip loads that have been tested and stored as anomalies, and so on, until all loads have been tested.
And S206, measuring the voltage (connecting load and pulling load) and the loop current (connecting load) of the output signal of the controller by using the handheld diagnosis terminal for the output type load.
S207, it is determined that the voltage is normal and the loop current is abnormal.
At S208, a load failure is determined.
S209, determining that the voltage is abnormal.
And S210, determining that the controller has a fault.
S211, disconnecting the controller from the load with respect to the input type load.
And S212, simulating the load by using the load simulation function of the handheld diagnosis terminal, sending a specific signal to the controller, and returning the received signal to the handheld diagnosis terminal by the controller.
And S213, comparing the two signals by the handheld diagnosis terminal, and if the two signals are the same, entering S214, and if the two signals are different, entering S215.
And S214, determining that the load is failed.
S215, the signal transmission circuit has a problem, and the controller is judged to be in failure.
And S216, normally powering on the air conditioning unit to operate.
And S217, if the load function is not abnormal, determining that the air conditioning unit is normal.
EXAMPLE III
Based on the same inventive concept, the embodiment provides an air conditioner fault diagnosis terminal, which can be used for implementing the air conditioner fault diagnosis method described in the embodiment. The air conditioner fault diagnosis terminal can be realized through software and/or hardware. The air conditioner fault diagnosis terminal is connected to an air conditioner.
Fig. 3 is a block diagram of a structure of an air conditioner fault diagnosis terminal according to a third embodiment of the present invention, and as shown in fig. 3, the air conditioner fault diagnosis terminal includes:
the detection module 31 is used for performing function detection on each load in the air conditioner one by one after the air conditioner is powered on;
a first determining module 32, configured to determine a type of an abnormal load if a load dysfunction is detected;
and a second determining module 33, configured to determine a load fault or a controller fault by using the diagnosis manner corresponding to the type.
Optionally, the detection module 31 is specifically configured to:
aiming at an output type load, sending a control instruction to the output type load, and if the output type load does not execute the control instruction, determining that the output type load is abnormal in function;
and aiming at an input type load, acquiring a parameter value detected by the input type load, comparing the parameter value with a reference value, and determining that the input type load is abnormal in function if the deviation of the parameter value and the reference value meets a preset condition.
Optionally, the second determining module 33 is specifically configured to:
in the case that the type of the abnormal load is an output type load, measuring a loop current between the controller and the abnormal load, then disconnecting the controller from the abnormal load, and measuring a voltage output by a load interface of the controller, wherein the load interface is used for connecting the abnormal load;
if the voltage is not matched with a preset power supply voltage of the abnormal load, determining that the controller fails;
and if the voltage is matched with the preset power supply voltage of the abnormal load, but the loop current is not matched with the specified current value, determining that the abnormal load has a fault.
Optionally, the second determining module 33 is specifically configured to:
under the condition that the type of the abnormal load is an input type load, disconnecting the controller from the abnormal load, and simulating the abnormal load to send a first specified signal to the controller by utilizing a load simulation function of the air conditioner fault diagnosis terminal;
receiving a second specified signal returned by the controller, wherein the controller returns the received first specified signal to the air conditioner fault diagnosis terminal;
judging whether the first specified signal is the same as the second specified signal;
if the abnormal load faults are the same, determining the abnormal load faults;
and if the difference is not the same, determining that the controller is in fault.
Optionally, the detecting module 31 includes:
the acquiring unit is used for acquiring the serial numbers of all loads in the air conditioner;
the detection unit is used for carrying out function detection on each load one by one according to the serial numbers;
and the recording unit is used for recording the number of the abnormal load.
Optionally, the air conditioner fault diagnosis terminal further includes: and the output module is used for outputting fault prompt information after the load fault or the controller fault is determined by adopting the diagnosis mode corresponding to the type.
The air conditioner fault diagnosis terminal can execute the air conditioner fault diagnosis method provided by the embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method. For details of the air conditioner fault diagnosis method provided by the embodiment of the present invention, reference may be made to the technical details that are not described in detail in the embodiment.
Example four
The embodiment provides an air conditioner fault diagnosis system, including: the air conditioner fault diagnosis terminal of the above embodiment.
EXAMPLE five
The embodiment provides a computer device, including: memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method of the above embodiments when executing the computer program.
The computer device may further include: an input device and an output device. The processor, memory, input device, and output device may be connected by a bus or other means.
The memory, which is a non-volatile computer-readable storage medium, may be used to store non-volatile software programs, non-volatile computer-executable programs, and modules. The processor performs air conditioner fault diagnostics by running non-volatile software programs, instructions, and modules stored in the memory.
The memory may include a storage program area and a storage data area, wherein the storage program area may store an operating device, an application program required for at least one function; the storage data area can store air conditioner models, load numbers and the like. Further, the memory may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device.
The input device may receive input numeric or character information and generate key signal inputs related to user settings and function control of the electronic apparatus. The output device may include a display device such as a display screen.
EXAMPLE six
Embodiments of the present invention further provide a non-volatile computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the method described in the above embodiments.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. Based on the understanding, the above technical solutions substantially or otherwise contributing to the prior art may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the various embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. An air conditioner fault diagnosis method is applied to an air conditioner fault diagnosis terminal, and the air conditioner fault diagnosis terminal is connected to an air conditioner, and the method comprises the following steps:
after the air conditioner is powered on, performing function detection on each load in the air conditioner one by one;
if the abnormal load function is detected, determining the type of the abnormal load;
and determining the load fault or the controller fault by adopting a diagnosis mode corresponding to the type.
2. The method of claim 1, wherein performing function detection on each load in the air conditioner one by one comprises:
aiming at an output type load, sending a control instruction to the output type load, and if the output type load does not execute the control instruction, determining that the output type load is abnormal in function;
and aiming at an input type load, acquiring a parameter value detected by the input type load, comparing the parameter value with a reference value, and determining that the input type load is abnormal in function if the deviation of the parameter value and the reference value meets a preset condition.
3. The method according to claim 1, wherein determining a load fault or a controller fault by using the diagnostic method corresponding to the type comprises:
in the case that the type of the abnormal load is an output type load, measuring a loop current between the controller and the abnormal load, then disconnecting the controller from the abnormal load, and measuring a voltage output by a load interface of the controller, wherein the load interface is used for connecting the abnormal load;
if the voltage is not matched with the preset power supply voltage of the abnormal load, determining that the controller is in fault;
and if the voltage is matched with the preset power supply voltage of the abnormal load, but the loop current is not matched with a specified current value, determining that the abnormal load has a fault.
4. The method according to claim 1, wherein determining a load fault or a controller fault by using the diagnostic method corresponding to the type comprises:
under the condition that the type of the abnormal load is an input type load, disconnecting the controller from the abnormal load, and simulating the abnormal load to send a first specified signal to the controller by utilizing a load simulation function of the air conditioner fault diagnosis terminal;
receiving a second specified signal returned by the controller, wherein the controller returns the received first specified signal to the air conditioner fault diagnosis terminal;
judging whether the first specified signal is the same as the second specified signal;
if the abnormal load faults are the same, determining the abnormal load faults;
and if not, determining that the controller fails.
5. The method according to any one of claims 1 to 4, wherein performing function detection on each load in the air conditioner one by one comprises:
acquiring the number of each load in the air conditioner;
carrying out function detection on each load one by one according to the serial numbers;
the number of abnormal loads is recorded.
6. The method according to any one of claims 1 to 4, wherein after determining a load fault or a controller fault by using the diagnosis mode corresponding to the type, the method further comprises:
and outputting fault prompt information.
7. An air conditioner fault diagnosis terminal, characterized in that, air conditioner fault diagnosis terminal is connected to the air conditioner, air conditioner fault diagnosis terminal includes:
the detection module is used for carrying out function detection on each load in the air conditioner one by one after the air conditioner is powered on;
the first determining module is used for determining the type of an abnormal load if the abnormal load function is detected;
and the second determining module is used for determining the load fault or the controller fault by adopting the diagnosis mode corresponding to the type.
8. An air conditioner fault diagnosis system, comprising: the air conditioner fault diagnosis terminal of claim 7.
9. A computer device, comprising: memory, processor and computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any of claims 1 to 6 when executing the computer program.
10. A non-transitory computer readable storage medium, having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the method of any of claims 1 to 6.
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