JPH04350439A - Control method of detection of erroneous wiring in heat pump type air conditioner - Google Patents

Control method of detection of erroneous wiring in heat pump type air conditioner

Info

Publication number
JPH04350439A
JPH04350439A JP3061301A JP6130191A JPH04350439A JP H04350439 A JPH04350439 A JP H04350439A JP 3061301 A JP3061301 A JP 3061301A JP 6130191 A JP6130191 A JP 6130191A JP H04350439 A JPH04350439 A JP H04350439A
Authority
JP
Japan
Prior art keywords
air conditioner
incorrect wiring
heat pump
detection
detected
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP3061301A
Other languages
Japanese (ja)
Inventor
Tatsuo Sakata
龍雄 酒田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CHIYOUFU SEISAKUSHO KK
Chofu Seisakusho Co Ltd
Original Assignee
CHIYOUFU SEISAKUSHO KK
Chofu Seisakusho Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CHIYOUFU SEISAKUSHO KK, Chofu Seisakusho Co Ltd filed Critical CHIYOUFU SEISAKUSHO KK
Priority to JP3061301A priority Critical patent/JPH04350439A/en
Publication of JPH04350439A publication Critical patent/JPH04350439A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To provide a control method for detecting erroneous wirings regarding all wirings in this invention though there has been a method, in which the erroneous wirings only of part of several outdoor connecting electric wires are detected, but there has been no method, in which the erroneous wirings of all outdoor connecting electric wires are detected. CONSTITUTION:A compressor 14, a four-way valve 15, an indoor heat exchanger 33 and an outdoor heat exchanger 34 are connected by a refrigerant piping 46. An indoor heat exchanger temperature sensor 24 is installed to the indoor heat exchanger 33, and the detected value of the temperature sensor is input to a sequence controller 23. The detected value of a current detector 5 mounted on its midway of an outdoor connecting electric wire is also input to the sequence controller.

Description

【発明の詳細な説明】[Detailed description of the invention]

【0001】0001

【産業上の利用分野】この発明は、ヒートポンプ式エア
コンの室外機・室内機間の誤配線を検出する制御方法に
関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control method for detecting incorrect wiring between an outdoor unit and an indoor unit of a heat pump type air conditioner.

【0002】0002

【従来の技術】従来の例では室外機負荷の消費電流は、
コンプレッサで3〜数十A、四方弁コイルで1A以下、
室外ファンモーターで1A以下となっている。そこで、
コンプレッサ用大容量リレー接点を閉じた時に、4A以
上の電流が電流検出器により検出されなかった場合には
、誤配線とし、動作停止およびエラー表示を行うものが
ある。
[Prior art] In the conventional example, the current consumption of the outdoor unit load is
3 to several tens of A for the compressor, 1 A or less for the four-way valve coil,
The outdoor fan motor is 1A or less. Therefore,
If a current of 4 A or more is not detected by the current detector when the large-capacity relay contact for the compressor is closed, it is assumed that the wiring is incorrect, and the operation is stopped and an error message is displayed.

【0003】0003

【発明が解決しようとする課題】しかしながら、このよ
うな従来例にあっては、コンプレッサ用大容量リレー接
点を閉じた時に、電流検出器が規定値以下の電流を検出
した時のみ誤配線を判定するという構造になっていたた
め、室外接続電線の一部を結線し、一部は誤配線又は未
配線、又は室外接続電線の一部を交差させたような誤配
線の場合にも正常配線と判定してしまい、誤配線(未配
線)であるにもかかわらず誤配線を検出できないことが
あるという問題点があった。
[Problem to be Solved by the Invention] However, in such conventional examples, incorrect wiring is determined only when the current detector detects a current below a specified value when the large capacity relay contact for the compressor is closed. Because of the structure, even if some of the outdoor connection wires are connected and some are incorrectly wired or unwired, or some of the outdoor connection wires are incorrectly wired and crossed, the wiring is determined to be normal. Therefore, there is a problem in that incorrect wiring may not be detected even though it is incorrect wiring (non-wiring).

【0004】0004

【課題を解決するための手段】この発明は、このような
従来の問題点に着目してなされたもので、従来例の誤配
線検出シーケンスを終了した後、規定電流に到達した場
合、又は一定時間経過した後に四方弁リレー接点を閉じ
る事によって、運転モードを切り替え、高・低圧間の圧
力差を減少させ、消費電流が低下する事と熱交換器に運
転モードに応じた温度変化が生じる事等を利用して、自
動的に誤配線チェックを行うという構造とすることによ
り、上記問題点を解決することを目的としている。
[Means for Solving the Problems] The present invention has been made by focusing on such conventional problems. By closing the four-way valve relay contact after a period of time has elapsed, the operating mode is switched, the pressure difference between high and low pressure is reduced, current consumption is reduced, and the heat exchanger undergoes a temperature change depending on the operating mode. The purpose of the present invention is to solve the above problems by creating a structure in which incorrect wiring is automatically checked using the following methods.

【0005】[0005]

【実施例】以下、この発明の実施例を図面に基づいて説
明する。まず、構成を説明すると、この誤配線検出シー
ケンスの対象となるヒートポンプエアコンの一実施例の
制御装置の構成図を図1、配線図を図2に示す。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the drawings. First, to explain the configuration, FIG. 1 shows a configuration diagram of a control device of an embodiment of a heat pump air conditioner that is subject to this miswiring detection sequence, and FIG. 2 shows a wiring diagram.

【0006】このヒートポンプエアコンは、冷房運転時
には、コンプレッサ用大容量リレー接点4を閉じる事に
より、室外接続電線17,18を通してコンプレッサ1
4に通電する。これにより冷媒が圧縮され“冷房サイク
ル”で動作を始める。この後、室外ファン用リレー接点
2、室内ファン用リレー接点22を閉じて空調を始める
。これらの接点は制御装置に入力された各種データによ
って開閉され、室内熱交換器33を冷却する。正常配線
時には全室外機負荷電流は電流検出器5を流れ、検出電
流値はシーケンス制御装置23に入力される。
During cooling operation, this heat pump air conditioner closes the large-capacity relay contact 4 for the compressor to connect the compressor 1 through the outdoor connection wires 17 and 18.
4 is energized. As a result, the refrigerant is compressed and the "cooling cycle" begins. After that, the outdoor fan relay contact 2 and the indoor fan relay contact 22 are closed to start air conditioning. These contacts are opened and closed according to various data input to the control device to cool the indoor heat exchanger 33. During normal wiring, all the outdoor unit load current flows through the current detector 5, and the detected current value is input to the sequence control device 23.

【0007】暖房運転時には上記冷房サイクル運転で制
御された接点4,2,22に四方弁用リレー接点3を加
え、これを閉じる。これにより冷凍サイクルは切り替わ
り、“暖房サイクル”となり、室内熱交換器33及び室
内熱交換器温度センサ24、室温センサ25を加熱する
During heating operation, a four-way valve relay contact 3 is added to the contacts 4, 2, and 22 controlled in the cooling cycle operation, and these are closed. As a result, the refrigeration cycle is switched to become a "heating cycle", and the indoor heat exchanger 33, the indoor heat exchanger temperature sensor 24, and the room temperature sensor 25 are heated.

【0008】この時に電流検出器5の電流が規定値以上
になった場合、又は室内熱交換器温度センサ24が規定
値以上の温度を検出した場合には、室外ファン16を停
止させる過負荷保護機能を有する。この機能は本発明の
チェックシーケンス中も有効である。
[0008] At this time, if the current of the current detector 5 exceeds a specified value, or if the indoor heat exchanger temperature sensor 24 detects a temperature exceeding a specified value, an overload protection function is provided in which the outdoor fan 16 is stopped. Has a function. This function is also valid during the check sequence of the present invention.

【0009】[0009]

【作用】次に作用を説明する。本発明の誤配線検出シー
ケンス図を図3に、検出シーケンスフローチャートを図
4に示す。
[Operation] Next, the operation will be explained. A miswiring detection sequence diagram of the present invention is shown in FIG. 3, and a detection sequence flowchart is shown in FIG.

【0010】この誤配線検出シーケンスはヒートポンプ
エアコン取付工事後、通常運転を開始する前に行う事に
より効果があるもので、例えば電源投入後の最初の運転
時のみに行うものとする。このチェックにより誤配線を
検出した場合には、シーケンスを中断、誤配線を示す表
示を行う。これを図5に示す。この表示の消去は商用電
源の再投入で行うものとする。また、誤配線を検出した
後は、表示の消去が行われるまでリモコン等による運転
停止・開始等は受け付けない。
[0010] This miswiring detection sequence is effective when performed after installation of the heat pump air conditioner and before starting normal operation; for example, it is performed only during the first operation after the power is turned on. If incorrect wiring is detected through this check, the sequence is interrupted and a display indicating the incorrect wiring is displayed. This is shown in FIG. This display shall be erased by turning on the commercial power again. Furthermore, after detecting incorrect wiring, operations such as stopping and starting operations using a remote control etc. will not be accepted until the display is erased.

【0011】誤配線検出シーケンス開始により、室内フ
ァン用リレー接点22とコンプレッサ用大容量リレー接
点4を閉じる。この後、設定時間t1経過後に電流検出
器5の検出電流iを、制御装置によりあらかじめ設定さ
れている電流値I1と比較し、i<I1の場合には室外
接続電線17及び18に誤配線があるとして、コンプレ
ッサ用大容量リレー接点4を開放し、誤配線の表示を行
う。(以上誤配線検出第1ステップとする。)
With the start of the miswiring detection sequence, the indoor fan relay contact 22 and the compressor large capacity relay contact 4 are closed. Thereafter, after the set time t1 has elapsed, the detected current i of the current detector 5 is compared with the current value I1 preset by the control device, and if i<I1, there is a miswiring in the outdoor connection wires 17 and 18. If there is, the large capacity relay contact 4 for the compressor is opened to indicate the incorrect wiring. (The above is the first step of detecting incorrect wiring.)

【001
2】しかし、ここで誤配線を検出しなかった場合には、
コンプレッサ用大容量リレー接点4は閉じたままである
。これを閉じてからの経過時間が、設定時間t3を超え
る前に検出電流iが設定電流値I3に達しなかった場合
には、後で説明する誤配線検出第2ステップを行わずに
、以下の誤配線検出第3ステップを実行する。すなわち
室内ファン用リレー接点22を開き、四方弁リレー接点
3を閉じる。この時に室内熱交換器温度センサ24の検
出温度をシーケンス制御装置23に記憶させ、この温度
をT1とする。この後設定時間t4経過した時に、再度
室内熱交換器温度センサ24の検出温度T2を取り、制
御装置でT2≧T1+α(αは誤配線検出を確実に行な
うための補正値であり、温度及びt4により決まる)が
成り立った場合には、正常に“暖房サイクル”に切り替
わったとして、室外接続電線19,及び室外接続電線1
8,17が正常に配線されている事となり、誤配線検出
シーケンスは終了し、リモコン設定通りの運転に復帰す
る。
001
2] However, if no incorrect wiring is detected here,
The compressor high capacity relay contact 4 remains closed. If the detected current i does not reach the set current value I3 before the elapsed time after closing this exceeds the set time t3, the following procedure is performed without performing the second step of detecting incorrect wiring, which will be explained later. Execute the third step of detecting incorrect wiring. That is, the indoor fan relay contact 22 is opened and the four-way valve relay contact 3 is closed. At this time, the temperature detected by the indoor heat exchanger temperature sensor 24 is stored in the sequence control device 23, and this temperature is set as T1. After this, when the set time t4 has elapsed, the temperature T2 detected by the indoor heat exchanger temperature sensor 24 is taken again, and the controller uses T2≧T1+α (α is a correction value to reliably detect incorrect wiring, and the temperature and t4 ) is true, it is assumed that the "heating cycle" has been normally switched to, and
8 and 17 are wired normally, the incorrect wiring detection sequence is completed, and the operation returns to the one set by the remote control.

【0013】前記設定時間t3経過以前に設定電流値I
3に検出電流iが達した場合には、誤配線検出第2ステ
ップを誤配線検出第1ステップに続いて実行する。検出
電流iが設定電流値I3に達した時点で四方弁用リレー
接点3を閉じる。この後設定時間t2後までに、電流検
出器5の検出電流が、冷媒の高・低圧間の圧力差が小さ
くなる事によって生じるコンプレッサ14の消費電流の
減少が、設定電流値I2まで達するか否かをシーケンス
制御装置23により監視し、設定電流値I2に達した場
合には、室外接続電線19及び室外接続電線18,17
に誤配線はないとして誤配線検出シーケンスを終了し、
リモコン及び操作スイッチの設定通りの運転に復帰する
[0013] Before the set time t3 elapses, the set current value I
When the detected current i reaches 3, the second step of detecting incorrect wiring is executed following the first step of detecting incorrect wiring. When the detected current i reaches the set current value I3, the four-way valve relay contact 3 is closed. After this, by the end of the set time t2, the current detected by the current detector 5 determines whether the decrease in the current consumption of the compressor 14 caused by the decrease in the pressure difference between the high and low pressures of the refrigerant reaches the set current value I2. is monitored by the sequence control device 23, and when the set current value I2 is reached, the outdoor connection wire 19 and the outdoor connection wires 18, 17 are
The miswiring detection sequence is terminated as there is no miswiring, and
Returns to operation according to the remote control and operation switch settings.

【0014】第2の実施例として、前記誤配線検出シー
ケンスを終了した後に残る室外接続電線20をチェック
するため、再度“暖房サイクル”運転状態とし、室内フ
ァン用リレー接点22を開き、室外ファン用リレー接点
2も閉じた状態で運転を行い、電流検出器5の出力電流
の上昇が制御装置に設定された電流上昇率以下になった
時、あるいは機器に設定された過負荷保護機能設定値に
達した時に、室外ファン用リレー接点2を開く。この後
に電流検出器5の検出電流が減少、又は上昇率が減少し
た場合には、全室外接続電線20,19,18,17に
誤配線がなかった事が確認できる。
As a second embodiment, in order to check the outdoor connection electric wire 20 remaining after the above-mentioned incorrect wiring detection sequence is completed, the "heating cycle" operation state is set again, the indoor fan relay contact 22 is opened, and the outdoor connection wire 20 is checked. Operate with the relay contact 2 also closed, and when the increase in the output current of the current detector 5 becomes less than the current increase rate set in the control device, or the overload protection function setting value set in the device. When the temperature is reached, the outdoor fan relay contact 2 is opened. If the current detected by the current detector 5 decreases or the rate of increase decreases after this, it can be confirmed that there is no miswiring in any of the outdoor connection wires 20, 19, 18, and 17.

【0015】第3の実施例として、実施例1又は2の誤
配線検出シーケンスの前に室温センサ25と室内熱交換
器温度センサ24の検出温度をシーケンス制御装置23
に取り込み、両センサ間の検出温度に設定温度TS以上
の温度差がある場合には、運転停止直後と判断し、誤配
線検出シーケンスの実行を行わずに赤外線リモコン受信
器42の受信データ及び機器に取り付けられた操作スイ
ッチ44,45等で設定された運転を行う。または制御
装置に電源が投入されて設定時間tS以上の間、赤外線
リモコン受信器42及び操作スイッチ44,45により
運転が開始されなかった時には、試運転でないと判断し
、誤配線検出シーケンスを実行せずにリモコン及び操作
スイッチの設定通りの運転を行う。
As a third embodiment, before the miswiring detection sequence of the first or second embodiment, the sequence control device 23 detects the temperatures detected by the room temperature sensor 25 and the indoor heat exchanger temperature sensor 24.
If the detected temperature between both sensors has a temperature difference greater than the set temperature TS, it is determined that the operation has just stopped, and the data received by the infrared remote control receiver 42 and the equipment are transferred without executing the incorrect wiring detection sequence. The operation is performed as set by the operation switches 44, 45, etc. attached to the. Or, if operation is not started by the infrared remote control receiver 42 and operation switches 44, 45 for a set time tS or more after the power is turned on to the control device, it is determined that it is not a trial run and the incorrect wiring detection sequence is not executed. Operate according to the settings on the remote control and operation switch.

【0016】[0016]

【発明の効果】以上のように、この発明によれば、その
構成を、通常のヒートポンプ式エアコンにないシーケン
スを用いて機器を動作させ、これの持つセンサによって
自動的に運転状態(配線)をチェックする。また、チェ
ックで誤配線を検出した際には、検出ステップに応じた
誤配線表示を行い、その後の運転を制限するようにした
ため、誤配線があった場合には、表示に基づいて誤配線
箇所の推測が可能なため、サービスを迅速に行うことが
できるようになった。
[Effects of the Invention] As described above, according to the present invention, the device is configured to operate using a sequence not found in ordinary heat pump type air conditioners, and the operating state (wiring) is automatically determined by the sensor it has. To check. In addition, when incorrect wiring is detected during the check, the incorrect wiring is displayed according to the detection step and subsequent operation is restricted. It is now possible to perform services quickly because it is possible to estimate the

【0017】また、室温に依らずに試運転が可能なため
、真冬の冷房・真夏の暖房を容易に確認することができ
るという効果が得られる。
[0017] Furthermore, since trial operation is possible regardless of the room temperature, it is possible to easily confirm cooling in the middle of winter and heating in the middle of summer.

【図面の簡単な説明】[Brief explanation of drawings]

【図1】本発明実施例の制御装置の構成図である。FIG. 1 is a configuration diagram of a control device according to an embodiment of the present invention.

【図2】本発明実施例の配線図である。FIG. 2 is a wiring diagram of an embodiment of the present invention.

【図3】本発明の一実施例のシーケンス図である。FIG. 3 is a sequence diagram of an embodiment of the present invention.

【図4】本発明の一実施例のフローチャートである。FIG. 4 is a flowchart of one embodiment of the present invention.

【図5】誤配線時の表示例である。FIG. 5 is an example of a display when wiring is incorrect.

【符号の説明】[Explanation of symbols]

1  商用電源 2  室外ファン用リレー接点 3  四方弁用リレー接点 4  コンプレッサ用大容量リレー接点5  電流検出
器 6〜9  室内端子台 10〜13  室外端子台 14  コンプレッサ 15  四方弁 16  室外ファン 17〜20  室外接続電線 21  室内ファン 22  室内ファン用リレー接点 23  シーケンス制御装置 24  室内熱交換器温度センサ 25  室温センサ 26  室外ファン用リレーコイル 27  コンプレッサ用リレーコイル 28  四方弁用リレーコイル 29  室外ファン用リレーコイル 30  電源ランプ 31  タイマーランプ 32  運転ランプ 33  室内機熱交換器 34  室外機熱交換器 35  室内機 36  室外機 37〜39  ランプ電流制限用抵抗器40〜41  
分圧抵抗器 42  赤外線リモコン受信器 43  絞り機構 44  リモコンによらずに一定温度設定の冷房運転を
行うための操作スイッチ 45  リモコンによらずに一定温度設定の暖房運転を
行うための操作スイッチ 46  冷媒配管
1 Commercial power supply 2 Relay contact for outdoor fan 3 Relay contact for four-way valve 4 Large-capacity relay contact for compressor 5 Current detector 6-9 Indoor terminal block 10-13 Outdoor terminal block 14 Compressor 15 Four-way valve 16 Outdoor fan 17-20 Outdoor Connection wire 21 Indoor fan 22 Relay contact for indoor fan 23 Sequence control device 24 Indoor heat exchanger temperature sensor 25 Room temperature sensor 26 Relay coil for outdoor fan 27 Relay coil for compressor 28 Relay coil for four-way valve 29 Relay coil for outdoor fan 30 Power supply Lamp 31 Timer lamp 32 Operating lamp 33 Indoor unit heat exchanger 34 Outdoor unit heat exchanger 35 Indoor unit 36 Outdoor unit 37-39 Lamp current limiting resistor 40-41
Voltage dividing resistor 42 Infrared remote control receiver 43 Aperture mechanism 44 Operation switch 45 for performing cooling operation at a constant temperature setting without using a remote control Operation switch 46 for performing heating operation at a constant temperature setting without using a remote control Refrigerant Piping

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】  ヒートポンプ式エアコンの誤配線を、
機器に内蔵された電流検出器の検出電流及び、室内熱交
換器の温度が運転状態を変化させる事によって変化する
事を利用して、自動的にチェックする機能を制御装置に
内蔵したものにおいて、一連の誤配線検出シーケンスの
途中で誤配線を検出した場合は、運転シーケンスを停止
させ、コンプレッサ負荷のみ通電を停止し、その他負荷
は誤配線検出時の状態に保持するようにしたことを特徴
とする、ヒートポンプ式エアコンにおける誤配線検出の
制御方法。
[Claim 1] Correcting the incorrect wiring of a heat pump air conditioner,
In a control device that has a built-in function to automatically check the current detected by the current detector built into the device and the temperature of the indoor heat exchanger that changes due to changes in operating conditions, If incorrect wiring is detected during a series of incorrect wiring detection sequences, the operation sequence is stopped, and only the compressor load is de-energized, while other loads are held in the state at the time the incorrect wiring was detected. A control method for detecting incorrect wiring in a heat pump air conditioner.
【請求項2】  誤配線検出シーケンスの中で、外気温
、室内温度等が誤配線検出に外乱を与える要素になって
いると制御装置により判断した場合には、一部又は全部
を複数用意された誤配線検出シーケンスの中より自動的
に選択し誤検出を防止する手段を持つ、請求項1のヒー
トポンプ式エアコンにおける誤配線検出の制御方法。
[Claim 2] In the miswiring detection sequence, if the control device determines that outside temperature, indoor temperature, etc. are factors that cause disturbance to miswiring detection, a plurality of parts or all of them are prepared. 2. A control method for detecting incorrect wiring in a heat pump type air conditioner according to claim 1, further comprising means for automatically selecting one of the incorrect wiring detection sequences to prevent incorrect detection.
【請求項3】  誤配線検出シーケンスの実行はエアコ
ン電源投入後、最初の運転開始時のみとするが、エアコ
ン運転中の停電後に再運転させた場合には誤配線検出シ
ーケンスを実行させない手段を持つ、請求項1のヒート
ポンプ式エアコンにおける誤配線検出の制御方法。
[Claim 3] The miswiring detection sequence is executed only when the air conditioner is first started after power is turned on, but there is a means to prevent the miswiring detection sequence from being executed when the air conditioner is restarted after a power outage during operation. A control method for detecting incorrect wiring in a heat pump air conditioner according to claim 1.
JP3061301A 1991-03-01 1991-03-01 Control method of detection of erroneous wiring in heat pump type air conditioner Pending JPH04350439A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3061301A JPH04350439A (en) 1991-03-01 1991-03-01 Control method of detection of erroneous wiring in heat pump type air conditioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3061301A JPH04350439A (en) 1991-03-01 1991-03-01 Control method of detection of erroneous wiring in heat pump type air conditioner

Publications (1)

Publication Number Publication Date
JPH04350439A true JPH04350439A (en) 1992-12-04

Family

ID=13167228

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3061301A Pending JPH04350439A (en) 1991-03-01 1991-03-01 Control method of detection of erroneous wiring in heat pump type air conditioner

Country Status (1)

Country Link
JP (1) JPH04350439A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04313633A (en) * 1991-04-11 1992-11-05 Mitsubishi Electric Corp Air conditioner
JPH05149597A (en) * 1991-11-29 1993-06-15 Noritz Corp Control system for air conditioner
KR20020012760A (en) * 2000-08-08 2002-02-20 토마스 이. 데이비스 Connecting Line Wiring Error Sensing Method in Separating Air-conditioner
JP2011169482A (en) * 2010-02-16 2011-09-01 Daikin Industries Ltd Device and method of detecting incorrect wiring

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04313633A (en) * 1991-04-11 1992-11-05 Mitsubishi Electric Corp Air conditioner
JPH05149597A (en) * 1991-11-29 1993-06-15 Noritz Corp Control system for air conditioner
KR20020012760A (en) * 2000-08-08 2002-02-20 토마스 이. 데이비스 Connecting Line Wiring Error Sensing Method in Separating Air-conditioner
JP2011169482A (en) * 2010-02-16 2011-09-01 Daikin Industries Ltd Device and method of detecting incorrect wiring

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