JPH04270846A - Controlling device for air conditioning apparatus - Google Patents

Abstract

PURPOSE:To store and display details a trouble, an occurring time, and hysteresis of trouble details when the trouble occurs in an air conditioning apparatus. CONSTITUTION:The details of a trouble occurring to a rewritable and nonvolatile storage means M and a time elapsing starting from an occurring point of time are written, and the trouble details and a lapse time are read from a storage means M during inspection and displayed on a display means D. Further, the details of only the given number of orderly occurring troubles are stored, in order, from the details of a latest trouble. During inspection, the details of an trouble are read from the storage means M, and hysteresis of the details of the trouble is displayed on the display means D. Since this constitution detects an trouble occurring time and hysteresis of the details of the trouble, estimation of a failure in operation cause is facilitated and the efficiency of a repair work can be improved.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for an air conditioner having a self-diagnosis function that displays the details of failures that have occurred in the past.

0002

2. Description of the Related Art FIG. 7 is a block diagram of a conventional control device for an air conditioner. Reference numeral 1 denotes a microcomputer that controls the control device according to a predetermined program; a memory 2, a CPU (central processing unit) 3, It is composed of an input section 4 and an output section 5. 6a and 6b are contacts that indicate the operation of the protection device, and each corresponds to a different type of protection device. 7a and 7b are light emitting diodes (LE
D), and serves as a display means D for determining whether normal operation is being performed, whether the contact 6a is operating, or whether the contact 6b is operating, based on the combination of lighting.

Reference numeral 8 denotes a rewritable non-volatile memory element, and when the contact 6a or 6b is activated and the inspection mode is entered, which of the contacts 6a and 6b is activated is detected via the output section of the microcomputer 1. It serves as a storage means M for writing. 9 is a switch for inspection;
When this switch is turned on, the microcomputer 1 reads the information written in the memory element 8, that is, which of the contacts 6a and 6b is activated.

Next, the operation of this conventional example will be explained using the flowchart shown in FIG. FIG. 5 is a flowchart of the display processing part of the processing of the microcomputer 1. First, in step 201, a protection device A (not shown) is installed.
It is determined whether the contact 6a indicating the operation of is activated. If it is activated, the inspection mode is set due to the activation of the protective device A, and in step 202, the failure content A is set in the display data and the process proceeds to step 205. .

If the contact 6a is not operating in step 201, it is determined in step 203 whether the contact 6b indicating the operation of the protection device B (not shown) is operating, and if it is operating, the protection device is activated. The inspection mode is set by the operation of B, and in step 204, failure content B is set in the display data.
Proceed to step 205.

At step 205, the display data set at step 202 or step 204 is written into the storage element 8. This process causes failure details A.
or B is stored in a non-volatile storage element. After this process, the process proceeds to step 209.

If the contact 6b is not operating in step 203, it is determined in step 206 whether the inspection switch 9 is turned on. When it is turned on, the information stored in the storage element 8 is read out in step 207 and set as display data, and the process proceeds to step 209.

[0008] At step 206, the inspection switch 9 is turned OFF.
If not, in step 208, the display data is set to indicate that it is normal. Therefore, in step 209, the light emitting diodes 7a and 7b perform display according to the display data set in step 202, step 204, step 207, or step 208.

[0009]

[Problem to be solved by the invention] However, in such conventional examples, ■ Even if the content of the failure is known,
I don't know when the problem occurred. ■ Since only one failure can be stored, there are problems such as not knowing the history of past failures.

The present invention was made in order to solve the problems of the conventional example as described above, and provides an air conditioner that can know the time of occurrence of a fault and the history of a plurality of faults that have occurred in the past. The purpose is to provide a control device.

[0011]

[Means for Solving the Problems] Therefore, the control device for an air conditioner according to the present invention attempts to achieve the above object by having the configurations as shown in (1) to (5). (1) The configuration has a function of writing the contents of the failure that has occurred into the storage means and periodically writing the elapsed time from the time when the contents of the failure were written into the storage means. (2) A display means is provided for reading out and displaying the failure details and elapsed time written in the storage means. (3) The configuration has a function of writing a predetermined number of contents of successive failures into the storage means. (4) If more than a predetermined number of failures occur, the configuration has a function to erase the oldest failure contents in chronological order among the failure contents written in the storage means and write the latest failure contents. do. (5) A switch is provided for reading out and displaying the history of failure details written in the storage means.

0012

[Operation] In the configurations (1) and (2) above, by reading out the details of the fault written in the storage means and the elapsed time from the time of occurrence, it is possible to know when the fault occurred, and (3) In the configurations (4) and (5), since a plurality of failure contents are stored in the storage means in the order of occurrence, the history of the failure contents can be known by sequentially reading out the contents.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In the figure, parts similar to those of the conventional example described above are given the same reference numerals, and their explanations will be omitted.

(Configuration) FIG. 1 is a block diagram of a control device for an air conditioner according to the present invention. Reference numerals 1 to 6 and 8 and 9 have the same configuration as the conventional example shown in FIG. 7, and have similar functions. However, the microcomputer 1 performs processing according to the flowchart shown in FIG. Reference numeral 70 denotes a display section as display means D, and FIG. 2 shows the display contents thereof. In FIG. 2, 70a, 70b, 70c, and 70d are 7-segment display elements, and FIG. 2(b) shows an example of the display.

(Operation) Based on the above configuration, the operation is shown in FIG.
This will be explained using the flowchart shown below. FIG. 3 is a flowchart of the display part of the processing of the microcomputer 1, similar to the conventional example.

First, in step 301, a protection device A (not shown) is installed.
It is determined whether the contact 6a indicating the operation of is activated, and if it is activated, the protection device A is activated to enter the inspection mode, and the time counter T is cleared to 0 in step 302.
In step 306, the failure content A is set in the display data, and then the process proceeds to step 307.

If the contact 6a is not activated in step 301, it is determined in step 303 whether the contact 6a indicating the activation of the protective device B (not shown) is activated, and if it is activated, the protective device B is activated. The inspection mode is set by the operation, the time counter T is cleared to 0 in step 304, and the failure content B is set in the display data in step 305, and then the process proceeds to step 307. In step 307, the display data set in step 305 or step 306 is written into the storage element 8.

If the contact 6b is not operating in step 303, it is determined in step 306 whether the inspection switch 9 is turned on. If it is not turned on, step 30
The process proceeds to step 9, where the display data is set to indicate that the process is normal, and the process proceeds to step 310.

In step 306, the inspection switch 9 is turned on.
If the memory element 8 is
Same as the failure content data written in memory element 8.
The value of the time counter T written in is read out and set as display data, and the process proceeds to step 310. In step 310, processing is performed to display the display data set in step 307, step 308, or step 309 on the display section.

The above is the main flowchart, but
Interrupts are generated at regular time intervals for this series of processing, and during the interrupt processing, the interrupt processing starting with TMO in FIG. 3 is performed. In this interrupt processing that occurs at fixed time intervals, it is first determined in step 401 whether the value of the time counter T is smaller than a predetermined value Tmax, and if it is smaller, the value of T is incremented by 1 in step 402, and the interrupt processing is performed. If the value of T is equal to or larger than Tmax in step 401, the process returns to the main process without performing the count-up process.

In this way, the display section 70 displays, for example, the screen shown in FIG.
The details of the failure and the elapsed time since the occurrence are displayed in the form shown in (b) and (c). FIG. 2(b) shows that failure content A occurred 124 hours ago. Further, FIG. 2(c) shows that no failure has occurred so far.

Next, a second embodiment will be explained based on the drawings. In the figure, the same parts as those in the conventional example are given the same reference numerals, and the explanation thereof will be omitted.

FIG. 4 is a block diagram of a control device for an air conditioner according to a second embodiment, and numerals 1 to 7 have the same configuration and functions as the conventional example shown in FIG. However, the microcomputer 1 performs processing according to the flowchart shown in FIG. Reference numeral 8 denotes a memory element serving as the memory means M, which is the same as in the conventional example, but has three memory areas therein as shown in FIG. 91, 92, 93 are inspection switches, which of these three switches is ON?
The storage area 81 inside the storage element 8 depending on whether
, 82, 83 to be read.

Next, FIG. 6 shows the operation of this second embodiment.
This will be explained using the flowchart shown below. FIG. 6 is a flowchart of the display processing part of the processing of the microcomputer 1 similar to the conventional example.

First, in step 101, it is determined whether the contact 6a indicating the operation of the protective device A (not shown) is activated. If it is activated, the inspection mode is set due to the activation of the protective device A, and the display is displayed in step 102. The failure content A is set in the data and the process advances to step 105.

If the contact 6a is not activated in step 101, it is determined in step 103 whether the contact 6b indicating the activation of the protective device B (not shown) is activated, and if the contact 6b is activated, the protective device B is activated. The inspection mode is set by the operation, and in step 104, failure content B is set in the display data.
Proceed to step 105.

In step 105, the data in storage area 2 is transferred to storage area 3, and the process advances to step 106. At this time, the data in storage area 3 disappears. In step 106, the data in storage area 1 is transferred to storage area 2, and the process advances to step 107. In step 107, the display data set in step 102 or step 104 is written into the storage area 1.

In this way, each time protection device A or B is activated, steps 105 to 107 are performed, and the contents of the three most recently occurring inspection modes are always stored in storage area 3, storage area 2, and memory in the order in which they occurred. They are stored in the order of area 1. After this series of processing, the process proceeds to step 115.

If the contact 6b is not operating in step 103, it is determined in step 108 whether the inspection switch 91 is turned on. If not ON, step 1
Step 10, it is determined whether the inspection switch 92 is turned on, and if it is not, it is determined whether the inspection switch 93 is turned on. Set the display data to indicate that it is normal.

In step 108, the inspection switch 91 is turned OFF.
If the answer is N, proceed to step 109;
Then, the data stored in the storage area 1 of the storage element 8 is read out and set as display data, and the process proceeds to step 115. If the inspection switch 92 is turned on in step 110, the process proceeds to step 111, in which the data stored in the storage area 2 of the memory element 8 is read and set as display data, and the process proceeds to step 115. If the inspection switch 93 is turned on in step 112, the process proceeds to step 113, where the data stored in the storage area 3 of the memory element 8 is read out and set as display data, and the process proceeds to step 115. Step 115
Now, steps 104, 102, 109, 111, 11
Display is performed by lighting or extinguishing the light emitting diodes 7a and 7b according to the display data set in any one of 3.

[0031]

[Effects of the Invention] As explained above, according to the present invention, the control device of the air conditioner can store the details of the fault as well as the elapsed time since the fault occurred, and display this content later. In addition, the system is configured so that multiple failure details that have occurred can be stored as an occurrence history, and these contents can be displayed in the order in which they occurred, making it possible to know the time of failure occurrence and the history of the failure contents. More detailed information for estimating the cause can be provided, and the efficiency of repair work can be improved.

[Brief explanation of the drawing]

[Figure 1] Block diagram of Example 1

[Figure 2] Display contents of the display section of Example 1

[Figure 3] Flowchart of Example 1

[Figure 4] Block diagram of Example 2

[Fig. 5] Memory contents of the memory element of Example 2

[Figure 6] Flowchart of Example 2

[Figure 7] Block diagram of conventional example

[Figure 8] Flowchart of conventional example

[Explanation of symbols]

1 Microcomputer 2 Memory 3 CPU 4 Input section 5 Output section 6a, 6b Protective device contacts 7a, 7b LED 8 Nonvolatile memory elements 9, 91, 92, 93 Inspection switch 70 Display section D Display means M Storage means

Claims (5)

[Claims] Claim 1: It has a rewritable non-volatile storage means, and when an abnormality occurs or a protection device is activated, it has a function of writing the contents of the fault to the storage means, and a function to write the fault contents from the storage means during inspection. In a control device for an air conditioner having a display means for reading and displaying the contents, a function is provided for writing the contents of a fault that has occurred into a storage means and periodically writing the elapsed time from the time when the contents of the fault are written into the storage means. A control device for an air conditioner, comprising: 2. The control device for an air conditioner according to claim 1, further comprising display means for reading out and displaying the details of the failure and the elapsed time written in the storage means. 3. It has a rewritable non-volatile storage means, and when an abnormality occurs or a protection device is activated, it has a function of writing the fault details to the storage means, and a function to write the fault details to the storage means during inspection. What is claimed is: 1. A control device for an air conditioner having a display means for reading and displaying contents, the control device having a function of writing a predetermined number of contents of successive failures into a storage means. 4. When a predetermined number of failures or more occur, the storage means has a function of erasing the oldest failure contents in chronological order among the failure contents written in the storage means and writing the latest failure contents. The control device for an air conditioner according to claim 3, characterized in that: 5. The control device for an air conditioner according to claim 3, further comprising a switch for reading out and displaying a history of failure details written in the storage means.