JPH06159761A - Controller for air conditioner - Google Patents

Abstract

PURPOSE:To smoothly control an operation of an air conditioner at the time of starting next time by storing data of a frequency, a temperature, a current, etc., in a memory irrespective of load conditions of the conditioner and an inverter when the conditioner is stopped. CONSTITUTION:When supply of an AC power source 2 is eliminated and a decrease of a voltage to a predetermined value is detected by a power source voltage monitoring circuit 15 at the time of operating an air conditioner, a signal output from a microcomputer 6 to an inverter 4 and a control signal output of a fan, a solenoid valve are stopped. Accordingly, an operation of a compressor 5 is stopped through the inverter 4, etc., and a fan motor 13 and a solenoid valve 14 are turned OFF through a relay driver 11, etc. Further, a write enabling signal for writing data of a RAM in a nonvolatile memory 7 is output, various data such as a frequency, a temperature, a current, etc., are written in the memory 7, and the data are useful to control an air conditioner at the time of starting next time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inverter device for variable speed control of a compressor induction motor of an air conditioner, and an electric eraser for storing various data such as frequency, temperature and current for controlling the air conditioner. The present invention relates to an air conditioner control device having an inverter control unit having a writable non-volatile memory.

[0002]

2. Description of the Related Art FIG. 9 is a block diagram showing a conventional air conditioner controller disclosed in, for example, Japanese Unexamined Patent Publication No. 4-62351. In FIG. Is a converter unit, 4 is an inverter unit, 5 is a compressor, 6 is a microcomputer, 7 is a non-volatile memory, and 8 is a DC / D.
C conversion, 9 control circuit power supply generation, 10 power transistor drive circuit, 11 relay driver, 12 relay,
13 is a fan motor, and 14 is a solenoid valve.

Next, the operation of the conventional technique will be described.
An operation command signal for controlling the operation of the outdoor unit is sent from the indoor unit to the outdoor control unit 1 in the form of an AC power supply 2 and a serial signal (not shown). The AC power supply 2 enters the converter unit 3 to be a DC power supply, is connected to the inverter unit 4 composed of a power transistor module, and is connected to the three-phase connection of the compressor 5. The operation command signal by the serial signal from the indoor unit activates the microcomputer 6, and the mask ROM or RA
In accordance with the control condition stored in M, a signal waveform for the inverter unit 4 is generated and supplied to the power transistor drive circuit 10, and the power transistor of the inverter unit 4 is controlled to control the operation of the compressor 5 steplessly. ing.

A non-volatile memory 7 is connected to the microcomputer 6, and the control condition is read and stored from the inspection jig through the microcomputer 6 by a special serial signal during the completion inspection of the product. When the power is turned off in the normal operation state, the control condition written in the RAM disappears, but the nonvolatile memory 7
The control condition written in is stored as it is, is recalled from the non-volatile memory 7 at the time of restart, and is written in the RAM, so that the operating state of the compressor 5 can be continued without newly inputting the control condition. it can.

Further, by writing and storing signals from various sensors from the RAM of the microcomputer 6 to the non-volatile memory 7 in time series, the failure state is stored in the non-volatile memory 7 even when the power is turned off due to a failure occurrence. By pursuing the cause of failure, it is possible to prevent recurrence and improve the efficiency of repair work.

[0006]

Although the conventional air conditioner control device is configured as described above, when a power failure or a user forcibly turns off the power during operation of the air conditioner,
Before that, the compressor induction motor, fan motor, solenoid valve, etc. were driven by the control circuit, so the discharge time of the power supply was short and all of the large amount of data such as frequency, current, temperature, etc., that controls the air conditioner, were stored. There is a problem in that the data cannot be written, and the next time the air conditioner is operated, it cannot be operated with different data.

When various tests are performed to detect manufacturing defects and component defects when assembling the inverter control device, various data such as temperature and current during operation of the air conditioner are written, so that the air conditioner operates. There was a problem that some kind of failure occurred in the market and the true value could not be grasped even when the data in the non-volatile memory was investigated, and the cause of the problem was hindered.

When the air conditioner has some trouble in the market, it is not known how it was used before and how much the compressor was operating.
Even if corrective action was taken, there was a problem that the true cause could not be grasped and the defect occurred again.

When reading various information and data written in the non-volatile memory, the read data is not a proper value due to the influence of noise entering from the power source of the air conditioner, and the air conditioner is operated. In such a case, there was a problem such as operation with different data or inability to operate.

The present invention has been made in order to solve the above problems, and the first invention is that the air conditioner and the inverter device are operated under any load condition when the air conditioner is stopped. It is an object of the present invention to provide an air conditioner control device capable of surely storing various data such as frequency, temperature and current in a non-volatile memory and smoothly controlling the operation of the air conditioner next time.

A second aspect of the present invention is to provide an air conditioner control device that does not include unnecessary information written in a non-volatile memory at the air conditioner assembly stage and can obtain only market data. There is.

A third aspect of the present invention is an air conditioner capable of accurately reading data from a non-volatile memory even when there is noise coming from the power source of the air conditioner and smoothly controlling the air conditioner. The purpose is to provide a control device.

[0013]

According to a first aspect of the present invention, there is provided a control device for an air conditioner, which includes a voltage detecting means for detecting a voltage of a circuit power source of an inverter control section, and an air conditioner based on a result of the voltage detecting means. Load reduction means to stop the drive signals of the compressor induction motor, fan motor, solenoid valve, etc. that controls the machine, and various values such as temperature and current before the air conditioner is stopped in the non-volatile memory after executing the load reduction means. And means for writing data.

A control device for an air conditioner according to a second aspect of the present invention is an air conditioner written in a non-volatile memory when various tests are performed to detect manufacturing defects and component defects when assembling an inverter control device. Is provided with means for erasing various data such as temperature and current during operation.

A control device for an air conditioner according to a third aspect of the present invention sums up initial data in an electrically erasable and writable non-volatile memory for storing various data such as frequency, temperature and current for controlling the air conditioner. Initial storage means for writing a value and an addition value; first computing means for performing addition and summation of the values read when the microcomputer of the inverter controller reads the data in the non-volatile memory during air conditioner operation,
Comparing means for comparing the data of the initial storage means with the data of the first computing means, means for storing the data as normal data in the microcomputer when the data match based on the result of the comparing means, and any means for mismatching A second arithmetic means for reading the data in the non-volatile memory again for the set number of times and executing the first arithmetic means, and a means for stopping the air conditioner if the data do not match after the second arithmetic means are executed. is there.

[0016]

In the first aspect of the invention, the voltage of the circuit power source of the inverter control unit is detected, and the drive signals for the compressor induction motor, the fan motor, the solenoid valve, etc. for controlling the air conditioner are stopped based on the detection result. The load on the power supply circuit is reduced, and after the load is reduced, various data such as temperature and current before stopping the air conditioner is written in the nonvolatile memory.

According to the second aspect of the present invention, when the inverter control device is assembled, various tests are performed to detect manufacturing defects and component defects. Controls to erase various data such as.

In the third aspect of the invention, the sum total value and the added value of the initial data are written in the electrically erasable and writable non-volatile memory that stores various data such as frequency, temperature and current for controlling the air conditioner. , The microcomputer of the inverter control unit performs summation and addition of the read values when reading the data in the non-volatile memory during operation of the air conditioner, compares the data in the non-volatile memory with the calculation result data, and compares the results. If the data match based on the above, it is stored in the microcomputer as regular data. If they do not match, the data in the non-volatile memory is read again at an arbitrary number of times to perform the above calculation, and if the data do not match after execution, the air conditioner is stopped.

[0019]

【Example】

Example 1. An embodiment of the present invention will be described below. Figure 1
FIG. 3 is a block diagram showing a control device for an air conditioner according to the present invention. In the figure, an AC power source 2 is a converter unit 3
Is connected to the inverter unit 4 including a power transistor module and connected to the three-phase connection of the compressor 5. An outdoor control unit 1 includes a microcomputer 6, a non-volatile memory 7, a DC / DC conversion circuit 8, a control circuit power supply generation circuit 9, a power transistor drive circuit 10,
It is composed of a relay driver 11 and a relay 12, and a power supply voltage monitoring circuit 15 is newly added. here,
As for the power supply of each circuit block of the outdoor control unit 1, the DC power supply of the converter unit 3 is lowered in voltage by the DC / DC conversion circuit 8,
Further, the control circuit power supply generation circuit 9 supplies 5V power.

An operation command signal for controlling the operation of the outdoor unit is sent from the indoor unit to the outdoor control unit 1 in the form of an AC power source 2 and a serial signal (not shown). An operation command signal based on a serial signal from the indoor unit is input to the microcomputer 6, and a signal waveform to the inverter unit 4 is generated and supplied to the power transistor drive circuit 10 according to a control condition stored in advance in the mask ROM or RAM. The power transistor of the inverter unit 4 is controlled to control the operation of the compressor 5 steplessly. Further, 13 is a fan motor, and 14 is an electromagnetic valve, which is connected to the relay 12 via the relay driver 11 and driven by a control command from the microcomputer 6.

A non-volatile memory 7 is connected to the microcomputer 6, and when the power is turned off in a normal operating state, the control condition written in the RAM disappears, but the non-volatile memory 7
The control condition written in is stored as it is, is recalled from the non-volatile memory 7 at the time of restart, and is written in the RAM, so that the operating state of the compressor 5 can be continued without newly inputting the control condition. it can.
The power supply voltage monitoring circuit 15 is connected to the input of the control circuit power supply generation circuit 9 (output of the DC / DC conversion circuit 8), monitors the input voltage of the control circuit power supply generation circuit 9, detects a voltage drop, and outputs it to the microcomputer 6. To do. Upon receiving the voltage drop detection signal, the microcomputer 6 shuts off the signal waveform output to the inverter unit 4 and the drive signals for the fan motor 13 and the solenoid valve 14.

Hereinafter, this operation will be described in detail with reference to the timing chart of FIG. In the figure, waveform A is DC / D
Output of C conversion circuit 8, that is, control circuit power supply generation circuit 9
, The waveform B represents the output of the control circuit power supply generation circuit 9, that is, the power supply voltage waveform of the microcomputer 6 and the nonvolatile memory 7, the waveform C is the output waveform of the power supply voltage monitoring circuit 15, and the waveform D is the compressor 5. , The fan motor 13 and the solenoid valve 14 are controlled, the waveforms E and F are the control signals of the nonvolatile memory 7 output from the microcomputer 6, the waveform E is the write enable signal, and the waveform F is the write data or the write clock signal. Is. FIG. 2 shows the operation of each part when the AC power supply 2 is not supplied, that is, when the DC / DC conversion circuit 8 is not supplied with power.

In the figure, when the input of the control circuit power source generation circuit 9 is V0 and the AC power source 2 is not supplied at the timing of t0, the voltage starts decreasing as shown in the figure. When the voltage drops to V1: The power supply voltage monitoring circuit 15 operates at t1 and outputs a power supply voltage drop detection signal: waveform C to the microcomputer 6. In response to this, the microcomputer 6 stops the signal output to the inverter unit 4 and the control signal output of the fan and the solenoid valve as shown by the waveform D. As a result, the operation of the power transistor drive circuit 10 is stopped, the operation of the compressor 5 is stopped via the power transistor of the inverter unit 4, and the fan motor 13 and the solenoid valve 14 are turned off via the relay driver 11. . Then, the microcomputer 6
A write enable signal for writing AM data to the nonvolatile memory 7: a waveform E is output to make the nonvolatile memory accessible, and various data such as frequency, temperature, and current are actually written: waveform F. Therefore, when the input voltage of the control circuit power supply generation circuit 9 drops to V1: t1, the signal waveform output to the inverter unit 4 and the drive signals of the fan motor 13 and the solenoid valve 14 are cut off, and further to the nonvolatile memory. Data will be written continuously.

When the signal output to the inverter unit 4 and the signal output to the fan motor 13 and the solenoid valve 14 are not stopped at time t1 in FIG. 2, the input of the control circuit power supply generation circuit 9 is indicated by the dotted line in the figure. As shown, the power supply voltage drops on the extension line from t0 to t1. Then, the output voltage of the control circuit power supply generation circuit 9 drops to a voltage value: V2 at which 5V cannot be maintained, and the output of the control circuit power supply generation circuit 9 starts to drop here. Here, the timing of falling to V2 is t2. Similarly, when the signal output to the inverter unit 4 and the signal output to the fan motor 13 and the solenoid valve 14 are stopped at time t1, the input of the control circuit power supply generation circuit 9 is t0 as shown by the solid line in the figure. The power supply voltage gradually decreases from the extension line from t1 to t1. Then, the output voltage of the control circuit power supply generation circuit 9 decreases to a voltage value: V2 at which 5V cannot be maintained,
The output of the control circuit power supply generation circuit 9 starts to decrease at the timing of t3.

As described above, when the input voltage of the control circuit power generation circuit 9 is monitored and the signal output to the inverter unit 4 and the signal output to the fan motor 13 and the solenoid valve 14 are stopped, the control circuit power generation circuit is stopped. The input of 9 drops slowly,
The voltage value at which the output voltage of the control circuit power generation circuit 9 cannot maintain 5V: The time required for the voltage to drop to V2 can be extended from t2 to t3, and as a result, the writable time of the nonvolatile memory 7 can be changed from t2-t1. It becomes possible to extend to t3-t1.

Example 2. Embodiment 2 of the present invention will be described below with reference to the drawings. In FIG. 3, the commercial power source 2 is rectified and smoothed by the converter unit 3 and converted into a DC power source. This DC power source is converted into an arbitrary voltage and frequency by the inverter unit 4, and the output of the inverter unit 4 causes the compressor 5 to operate. Driven. Two
3 is a current sensor that detects the current flowing into the converter unit 3, 25 is an overcurrent detection sensor that detects the overcurrent of the current flowing into the inverter unit 4, and 21 is a temperature sensor that detects the temperature of each part. is there. A signal interface circuit 20 has a function of receiving a signal from the outside and a function of transmitting a signal from the microcomputer 6 to the outside. Signal from the sensor and signal interface circuit 20
Is input to the microcomputer 6 to perform various processes in the microcomputer 6 to control the operation of the outdoor unit. Further, the microcomputer 6 analyzes the signals from the various sensors to determine an abnormal state or the like. This abnormal state is written in the non-volatile memory 7 connected to the microcomputer 6, and the abnormal state can be stored and retained even when the power is turned off. The outdoor control unit 1 is configured as described above and controls the outdoor unit of the split type air conditioner.

Next, the operation will be described. Microcomputer 6
Is an operation command received from the outside by the signal interface circuit 20, the current sensor 23, the overcurrent sensor 25,
The operation of the compressor 5 is controlled by each sensor output of the temperature sensor 21. When the microcomputer 6 detects an abnormality in various sensors, it stops the operation of the compressor 5 and stores the abnormal state in the non-volatile memory 7 connected to the microcomputer 6 to protect the product. The abnormal state stored in the non-volatile memory 7 can be read by a special signal from the outside. In the inspection stage at the time of completion of such a product, it is usual to test whether the abnormality detection of various sensors as described above operates normally, and after confirming the operation, the product is shipped. In addition, at the time of shipping inspection, it is common to operate the product in a special test mode instead of the normal mode to check each part for the purpose of improving the inspection efficiency.

Next, the operation will be described with reference to the flowchart of FIG. First, in step 100, an operation command from the outside is read, and the operation of the compressor 5 is started according to the command. Then, in step 101, the detection values of various sensors are read, and in step 102, the entire control is performed. Then, in step 103, an abnormality determination of various sensors is performed,
If it is determined to be abnormal in step 103, step 1
04, the abnormal state is written in the non-volatile memory 7 and the process proceeds to step 105. If it is determined to be normal in step 103, the process proceeds to step 105 as it is to determine whether the operation command is the normal mode or the test mode. Step 10
If the mode is 5 in the test mode, proceed to step 106,
Clear the abnormal state written in the non-volatile memory 7,
Return to step 100. If it is determined in step 105 that the mode is the normal mode, the process directly returns to step 100. By operating as described above, abnormal information written in the non-volatile memory 7 during the product inspection test can be surely cleared and the product can be shipped.

Example 3. Further, in the above embodiment, when an abnormality occurs, the abnormality information is once written to the nonvolatile memory 7, and then the test mode is determined to clear the abnormality information. However, the test mode is determined immediately before writing. The same effect can be obtained by the method of skipping the writing of abnormal information. The operation will be described below with reference to the flowchart of FIG. First, in step 200, an operation command from the outside is read, and the operation of the compressor 5 is started according to the command. Then, the detected values of various sensors are read in step 201, and the whole control is performed in step 202. Then, in step 203, the abnormality of each sensor is determined,
If it is determined to be abnormal in step 203, step 2
In step 04, it is determined whether the operation command is the normal mode or the test mode. In the case of the test mode in step 204, nothing is written in the nonvolatile memory 7 and the process returns to step 200. If it is determined in step 204 that the mode is the normal mode, the process proceeds to step 205, the abnormal state is written in the nonvolatile memory 7, and the process returns to step 200.

Example 4. FIG. 6 is a flowchart showing the operation of the fourth embodiment, which will be described below. AC power supply 2
Is turned on, the DC / DC conversion circuit 8 and the control circuit power supply generation circuit 9 are operated, and when the power is supplied to the outdoor control unit 1, the microcomputer 6 is operated and the processing of FIG. 6 is executed. Step 6
At 01, the integrated data of the compressor is read from the non-volatile memory 7 and stored at step 602 in the integrated counter set in the RAM of the microcomputer 6. Here, zero is read when the power is first turned on. Next, if the compressor 5 is in the operating state in step 603, step 604 is executed, and the integration counter set in the RAM is incremented in step 602. Step 604 is not executed while the operation is stopped.
When a write request to the non-volatile memory 7 is generated due to the power supply voltage drop or the like raised in the first embodiment, R is read in step 606.
The integration counter value set in AM is written in a predetermined area in the nonvolatile memory. The area in the nonvolatile memory 7 written in step 606 is the area read in step 601, and the processing of FIG. 6 is executed again at the next power-on,
The data written in step 606 is read out, and thereafter the operating time of the compressor 5 is continuously integrated and held in the non-volatile memory 7.

Example 5. Embodiment 5 of the present invention will be described below with reference to the drawings. 7, a non-volatile memory 7 storing control conditions and control data is connected to the microcomputer 6, and the data in the non-volatile memory 7 is read by a read circuit 63 of the microcomputer 6 and read / write. It is input to and stored in the possible memory 7. The data read by the read circuit 63 is also input to the adder 64, and the adder 64 calculates the relaxation of the read data. The comparator 65 compares the sum of the data of the adder 63 with the data indicating the sum of the data stored in the nonvolatile memory 7.

Next, the operation will be described. In the non-volatile memory 7, as shown in Table 1, data necessary for controlling the microcomputer 6 and control conditions are stored as data 1 to data 5. Then, at the next address, the lower 8 bits of the sum of the data 1 to data 5 are stored as collation data of the data 1 to data 5.

[0033]

[Table 1]

Next, the operation will be described with reference to the flowchart of FIG. In step 101, the addition counter is initially cleared, and in step 102, 1 byte of data in the non-volatile memory 7 is read. Then, the data read in step 103 and the value of the addition counter are added, and the lower 8 bits are stored in the addition counter. And step 104
If the required number of bytes of data has been read in and the required number has not been read, the process returns to step 102 to read the data of the next address from the non-volatile memory 7, and the data read in the addition counter in step 103 is added to the lower 8 Store the bit in the addition counter. Then, in step 104, the completion of reading is checked and the necessary number of data is read. Then, the process proceeds to step 105, the collation data is read from the non-volatile memory, and step 1
Go to 06, and the value of the addition counter, and step 105
It is compared with the verification data read in. Since the collation data is calculated in advance by the same method as the above calculation method, if there is no problem at the time of reading the data in step 102, it always matches the addition result of the addition counter 64. If the result of comparison in step 106 is that there is no match, it is determined that noise or the like was mixed during reading and normal reading was not performed, and the processing proceeds to step 107, error processing is performed, an error is displayed, and control is stopped. If both data match at step 106, it is judged that each data has been read normally, and the routine proceeds to step 108 to perform normal control based on the data read from the non-volatile memory 7.

Example 6. Although the lower 8 bits of the sum total are used for the collation data in the above-described embodiment, other methods such as a method using a two's complement value for the sum total, or a sum total for each bit of data 1 to data 5 are used. There are various types such as the vertical parity method performed in the above, but it goes without saying that the same effect as the above-mentioned embodiment can be obtained.

Example 7. Further, in the above-mentioned embodiment, if the collation result does not match, an error display is made as an error process and the control is stopped. However, the read-only memory of the microcomputer 6 stores the control data and control conditions in case of an abnormality in advance. When an error occurs, the error recovery may be performed so that the data stored in the read-only memory of the microcomputer 6 is used for the subsequent control.

[0037]

As described above, the control device for the air conditioner according to the first aspect of the present invention includes the voltage detecting means for detecting the voltage of the circuit power source of the inverter control part, and the air conditioner based on the result of the voltage detecting means. Load reducing means for stopping drive signals for the compressor induction motor, fan motor, solenoid valve, etc.
After the load reducing means is executed, the nonvolatile memory is provided with means for writing various data such as temperature and current before stopping the air conditioner. Under various load conditions, various data such as frequency, temperature, and current can be reliably stored in the non-volatile memory for smooth control during the next operation of the air conditioner, and no expensive parts with fast writing speed are used. However, there is an effect that it can be configured at low cost.

The control device for an air conditioner according to the second aspect of the invention is an air conditioner written in a non-volatile memory when various tests are performed to detect manufacturing defects and component defects when the inverter control device is assembled. Since a means for erasing various data such as temperature and current during operation is provided, unnecessary information written in the non-volatile memory at the air conditioner assembly stage is not included, and there is an effect that only market data can be obtained. .

A control device for an air conditioner according to a third aspect of the present invention is an electrically erasable and writable nonvolatile memory for storing various data such as frequency, temperature and current for controlling the air conditioner when the inverter control device is assembled. First storage means for writing the sum total value and addition value of the initial data to the non-volatile memory and the sum total and value read when the microcomputer of the inverter controller reads the data in the non-volatile memory during the air conditioner operation. The calculation means, the comparison means for comparing the data of the initial storage means with the data of the first calculation means, and the means for storing the data as normal data in the microcomputer when the data match based on the result of the comparison means do not match. In the case of, the second operation means for reading the data of the non-volatile memory again for the arbitrary number of times and executing the first operation means, and the second operation Since the means for stopping the air conditioner if the data does not match after executing the means, the data can be accurately read from the non-volatile memory even when there is noise entering from the power source of the air conditioner, etc. This has the effect of smoothly controlling the air conditioner.

[Brief description of drawings]

FIG. 1 is a circuit block diagram illustrating a configuration of a control device for an air conditioner according to a first embodiment of the present invention.

FIG. 2 is a timing diagram illustrating the operation of the control device for an air conditioner according to the first embodiment of the present invention.

FIG. 3 is a circuit block diagram illustrating a configuration of a control device for an air conditioner according to a second embodiment of the present invention.

FIG. 4 is a flow chart diagram illustrating an operation of a control device for an air conditioner according to a second embodiment of the present invention.

FIG. 5 is a flow chart for explaining the operation of the control device for an air conditioner according to the third embodiment of the present invention.

FIG. 6 is a flow chart for explaining the operation of the control device for an air conditioner according to the fourth embodiment of the present invention.

FIG. 7 is a circuit block diagram illustrating a configuration of a control device for an air conditioner according to a fifth embodiment of the present invention.

FIG. 8 is a flow chart for explaining the operation of the control device for an air conditioner according to the fifth embodiment of the present invention.

FIG. 9 is a circuit block diagram illustrating a configuration of a control device for a conventional air conditioner.

[Explanation of symbols]

 1 Outdoor control unit 2 AC power supply 3 Converter unit 4 Inverter unit 5 Compressor 6 Microcomputer 7 Non-volatile memory 8 DC / DC conversion circuit 9 Control circuit power supply generation circuit 10 Power transistor drive circuit 11 Relay driver 12 Relay 13 Fan motor 14 Solenoid valve 15 power supply voltage monitoring circuit 20 signal interface circuit 21 temperature sensor 23 current sensor 25 overcurrent detection sensor 63 readout circuit 64 adder 65 comparator

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroaki Suzuki 3-18-1, Oka, Shizuoka City Mitsubishi Electric Engineering Co., Ltd. Nagoya Office Shizuoka Branch Office (72) Inventor Takahiro Ishigami 3--18, Oka Shizuoka No. 1 Mitsubishi Electric Engineering Co., Ltd. Nagoya Office Shizuoka Branch

Claims (3)

[Claims] 1. A converter section for converting an input commercial AC power source into a direct current, an inverter section for again converting this direct current into an alternating current of an arbitrary frequency, and a variable frequency from this inverter section to a compressor induction motor of an air conditioner. And an inverter control unit having a microcomputer for generating and outputting a signal of an arbitrary frequency voltage to the inverter unit, and the inverter control unit controls the frequency, temperature, current, etc. of the air conditioner. In an air conditioner control device having an electrically erasable and writable non-volatile memory for storing various data of 1., voltage detection means for detecting a voltage of a circuit power supply of the inverter control part, and based on a result of the voltage detection means. Load reducing means for stopping drive signals for the compressor induction motor, fan motor, solenoid valve, etc. that control the air conditioner And a means for writing various data such as temperature and current before stopping the air conditioner into the non-volatile memory after executing the load reducing means, the control device for the air conditioner. 2. When the inverter control device is assembled, various data such as temperature and current during operation of the air conditioner written in the non-volatile memory when various tests are performed in order to detect manufacturing defects and component defects. An air conditioner control device comprising means for erasing. 3. A total value of initial data and an addition value in an electrically erasable and writable non-volatile memory for storing various data such as frequency, temperature and current for controlling an air conditioner during assembly of an inverter control device. Initial storage means for writing
When the microcomputer of the inverter control unit reads the data of the non-volatile memory during the operation of the air conditioner, the first calculation means for performing summation and addition of the read values, the data of the initial storage means and the data of the first calculation means Comparing means for comparing, means for storing as normal data in the microcomputer when the data match based on the result of the comparing means, and for mismatching, the data in the non-volatile memory is read again at an arbitrary number of times. An air conditioner control device comprising: a second calculation means for executing one calculation means; and a means for stopping the air conditioner if the data after execution of the second calculation means do not match.