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All Journal Teknik: Jurnal Ilmu Teknik dan Informatika Jupiter: Publikasi Ilmu Keteknikan Industri, Teknik Elektro dan Informatika
Ghifari Permana
Universitas Sultan Ageng Tirtayasa
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering

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Studi Analisis Perbaikan Air Conditioner Terhadap Efektivitas dan Efisiensi Sistem Pendingin Ruangan Ghifari Permana; Tita Nurdaiyah; Avisa Marellaningtyas; Daffa Abdillah Rizal; Muhamad Zia Ulhaq; Siti Nurasiyah; Desmira Desmira
Teknik: Jurnal Ilmu Teknik dan Informatika Vol. 6 No. 2 (2026): Oktober: Teknik: Jurnal Ilmu Teknik dan Informatika
Publisher : LPPM Sekolah Tinggi Ilmu Ekonomi - Studi Ekonomi Modern

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51903/teknik.v6i2.1286

Abstract

Air conditioner (AC) is a vital device in room cooling systems widely used in tropical climate regions such as Indonesia. With high usage intensity, AC units are susceptible to performance degradation due to dirt accumulation, component damage, and lack of regular maintenance. This study aims to analyze the impact of comprehensive repair (overhaul) of indoor AC units on improving cooling effectiveness and energy consumption efficiency. Research methods include field observation, measurement of thermal parameters before and after repair, and comparative data analysis. The research object is a 1 HP split AC unit that has been operating for more than three years with identified damage symptoms. Components inspected and repaired include evaporator, blower fan, air filter, and condensate drainage system. The results showed that after overhaul, the air outlet temperature decreased by an average of 3.2°C, the coefficient of performance (COP) increased from 2.41 to 3.18, and electrical power consumption decreased by 12.7%. The conclusion of this study confirms that regular maintenance and proper overhaul procedures significantly improve the performance and energy efficiency of AC systems.
Sistem Kontrol Mesin Pengisian Minyak Otomatis Berbasis PLC Omron CP1L di PT Raharjo Teknik Indonesia Ghifari Permana; Didik Aribowo
Jupiter: Publikasi Ilmu Keteknikan Industri, Teknik Elektro dan Informatika Vol. 4 No. 4 (2026): Jupiter: Publikasi Ilmu Keteknikan Industri, Teknik Elektro dan Informatika.
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/jupiter.v4i4.1720

Abstract

Industrial automation development demands production processes that are efficient, accurate, and consistent, including the oil filling process, which previously relied on manual systems with several drawbacks such as inconsistent filling volume, overfill risk, and dependence on operator skill. This study aims to reconstruct and analyze the control system of an automatic oil filling machine based on a Programmable Logic Controller (PLC) Omron CP1L at PT Raharjo Teknik Indonesia. The method used is applied research with a descriptive qualitative approach, through direct observation, documentation of I/O list data and ladder diagram programs, and interviews with machine technicians. The data were analyzed by reconstructing the ladder diagram program, tracing the control logic flow in each rung, and comparing it with the actual working conditions in the field. The results show that the control system uses a configuration of 24 input channels and 32 output channels that regulate two operating modes (automatic and manual/JOG) with an interlock system, position reading through an encoder converted into degree values, inverter control, and the stages of pouch pick-up, pouch opening, oil filling, and sealing that run automatically and sequentially. The implementation of the PLC Omron CP1L has proven capable of improving filling volume consistency, reducing human error, accelerating the production process, and simplifying the control panel wiring system compared to conventional relay-based systems, thereby supporting the overall efficiency of the production line.
Co-Authors Avisa Marellaningtyas Daffa Abdillah Rizal Desmira Desmira Didik Aribowo Muhamad Zia Ulhaq Siti Nurasiyah Tita Nurdaiyah