A. On August 29, 2013, the Plaintiff, who is a stuffer, entered into a mechanical installation service contract, entered into a mechanical installation service contract (hereinafter “instant contract”) with the Defendant, who is a machinery installer, with the content that the Defendant would pay 16 million won (excluding value-added tax, 60% at the time of contract, and 40% each payment after the installation) to the Defendant’s establishment in the Plaintiff’s place of business, while the Defendant was manufactured by C Co., Ltd. (hereinafter “C”).

On September 10, 2013, the Plaintiff remitted the amount of KRW 9.6 million, which is 60% out of the amount of installation to the Defendant.

B. The Defendant installed the instant machinery from September 11, 2013 to September 29, 2013, and installed the instant machinery at the Plaintiff’s workplace, and the Plaintiff did not work properly, but did not work normally.

C. As a result of appraiser E’s appraisal, the problem of installing the instant machinery is a problem that is not set up in parallel with the ground among the instant machinery, and the gluor part of gluor part of gluor part of gluor part of gluor part of the instant machinery was installed less than 7-8cc and less than the gluor part of gluor part, and the two parts were not connected horizontally. Furthermore, there is a problem that the said gluor part of the instant machinery was not installed firmly, resulting in the occurrence of vibrations, noise, etc. in the course of operating the machinery, and the gluoring transport is not smooth. In order to improve these problems, it is inevitable to newly install the instant machinery. 2) In order to improve these problems, it is inevitable to newly install the instant machinery: 10 million won (the appraiser shall not be deemed that the said work is included in the content of the instant contract, and shall bear the Plaintiff’s expense at the Plaintiff’s expense): 200,000