JPH05157313A - Trouble diagnosing device of air conditioner - Google Patents

Abstract

PURPOSE:To facilitate a trouble diagnosing of an air conditioner at an operator' s side, perform a clear displaying of causes of trouble with some numerical LEDs and improve a maintenance characteristics. CONSTITUTION:A trouble diagnosing device of an air conditioner is comprised of a remote controller having a switch for generating a trouble diagnosing starting signal mounted therein, a receiver 4 for receiving a signal from the remote controller at a main body side, an electronic control device 3 having a micro-computer for performing an operation control of an air conditioner and some numerical LEDs 8 for indicating an operating state of the air conditioner. When the trouble diagnosing starting signal from the remote controller is received, a trouble diagnosing of the air conditioner is carried out by the electronic control device 3 and then the content of trouble is displayed at the numerical LEDs 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner failure diagnosis.

[0002]

2. Description of the Related Art A conventional air conditioner failure diagnosis apparatus will be described with reference to FIGS.

FIG. 1 shows an air conditioner body 1 and a remote control device 2.
(Hereinafter referred to as remote controller), and the air conditioner is operated in a set mode by a signal (infrared ray) from the remote controller 2. Reference numeral 3 is an electronic control unit equipped with a microcomputer for controlling the operation of the air conditioner body 1. FIG. 5 is an electric system diagram of the air conditioner main body 1, 4 is a receiving section for receiving a signal from the remote controller 2, 5 is a display section for showing an operating state, an operation LED (L1) showing that the vehicle is in operation, and a timer set Timer LED (L2) that indicates that the sleep is in progress and sleep LED that indicates that the sleep mode is being set
It is composed of three LEDs (L3). Reference numeral 3 is an electronic control unit equipped with the above-mentioned microcomputer, 6 is a temperature thermistor for detecting room temperature, and 7 is a blower.

Conventionally, for example, when the temperature thermistor is broken, the timer LED (L2) of the display unit 5 is blinked once for 5 seconds to display a failure.

[0005]

However, in the conventional fault diagnosis, since a plurality of fault contents are displayed by the number of times the timer LED blinks per unit time, it is difficult to accurately determine the fault contents on site. It takes a lot of time to specify the details of the failure.

[0006]

In order to solve the above problems, the present invention provides a switch for issuing a failure diagnosis start signal to a remote controller, a receiver for receiving a signal from the remote controller, and a micro controller for controlling the operation of an air conditioner. An electronic control unit equipped with a computer and a number L indicating the operating state of the air conditioner
ED is provided, and when the failure diagnosis start signal is received from the remote controller, the failure diagnosis of the air conditioner is performed by the electronic control unit, and the details of the failure are displayed on the numerical LED.

[0007]

When the failure diagnosis start signal is received from the remote control device, the electronic controller performs the failure diagnosis of the air conditioner and displays the content on the LED to confirm the trial run when the air conditioner is installed. Diagnosis when a failure occurs is easily possible at hand.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. FIG. 2 is an electric system diagram of the air conditioner, 4 is a receiving unit that receives a signal from the remote controller 2, and 5 is a display unit that indicates an operating state, and an operation LED (L1) that indicates that the vehicle is operating.
And timer LED (L
2) and a good night LED (L3) indicating that the good night mode is being set. Reference numeral 3 is an electronic control unit equipped with the above-mentioned microcomputer, 6 is a temperature thermistor for detecting room temperature, 7 is a blower, and 8 is a numerical LED which indicates the contents of failure diagnosis by a numeral. FIG. 3 shows the appearance of the numerical LED 8.

Now, when the receiving section 4 receives a failure diagnosis start signal from the remote controller 2, the electronic control unit 3 enters a failure diagnosis mode and diagnoses the resistance value of the temperature thermistor 6 as shown in the flowchart of FIG. Is less than or equal to R1,
The short circuit is judged to be short and the numeral LED8 displays (11). If the resistance value is R2 or more, it is judged as a disconnection (12).
Is displayed. If the resistance value is between R1 and R2, it is determined to be normal, and the process proceeds to the next step. Next, the operating current of the blower is diagnosed, and if the operating current is less than I1, it is judged as a disconnection (2
0) is displayed, and if it is I2 or more, it is judged that the load is abnormal, and (21)
Is displayed. The diagnosis is sequentially performed below, and if all are normal, (00) is displayed. Table 1 shows a matrix of fault diagnosis (only part).

[0010]

[Table 1]

[0011]

As is apparent from the above embodiments, the present invention provides a remote controller equipped with a switch for issuing a failure diagnosis start signal, a receiver for receiving a signal from the remote controller on the main body side, and an air conditioner. An electronic control unit equipped with a microcomputer for controlling the operation of the air conditioner and a numerical LED indicating the operating state of the air conditioner are provided, and when a failure diagnosis start signal is received from the remote control device, the air conditioner is operated by the electronic control unit. Performs a machine failure diagnosis and displays the details of the failure as a number LE
By displaying in D, it is possible to easily check the trial run when installing the air conditioner and diagnose when a failure occurs, and it is possible to reliably identify the cause of the failure by the displayed number. I have.

[Brief description of drawings]

FIG. 1 is an external view showing an air conditioner body and a remote controller.

FIG. 2 is an electric system diagram of an air conditioner showing an embodiment of the present invention.

FIG. 3 is an external view of the same-numbered LED

FIG. 4 is a flowchart showing a flow of the same failure diagnosis.

[Fig. 5] Electric system diagram of a conventional air conditioner

[Explanation of symbols]

 2 Remote control 3 Electronic control unit 4 Receiver 8 Numerical LED

Claims (1)

[Claims] 1. A remote control device (remote control) equipped with a switch for issuing a failure diagnosis start signal, a receiver for receiving a signal from the remote control device on the main body side, and a microcomputer for controlling the operation of the air conditioner. And an electronic control unit equipped with a numeral LED indicating the operating state of the air conditioner
And a failure diagnosis device for the air conditioner, which performs a failure diagnosis of the air conditioner by the electronic control device when the failure diagnosis start signal is received from the remote operation device and displays the failure content on a numerical LED.