After two years of being offline, a Carrier 30HXC chiller has been successfully restored to working operation. Tradewinds company director (Stuart Ginbey) took on the challenge of resurrecting an old chiller that had previously been showing significant defects. The situation was particularly critical, as the facility had been operating with only one chiller for an extended period. If this remaining chiller had failed, it could have resulted in significant disruptions and operational challenges onboard. The repair and restoration of this chiller required a comprehensive approach, encompassing installation, refitting, and other specialised interventions. This critical piece of equipment plays a vital role in ensuring the smooth functioning of a marine industrial facility.

The chiller’s malfunction was a result of a combination of factors, including:

• Incorrect Software: The MBB boards were running the wrong software version, even after being sent back to Carrier for reprogramming.
• Misconfigured DIP Switches: Incorrect DIP switch settings contributed to the system’s failure.
• Electrical Issues: A 400A MCB failure and a corroded CHW sensor further complicated the problem.
• Overcharging: A faulty EEV cable plug caused the system to be overcharged, leading to the EEV remaining permanently closed.
• Oil Contamination: The liquid line and EEV were contaminated with oil, requiring extensive cleaning and maintenance.

 Resolving these issues required three days of intensive troubleshooting and reverse engineering. Our team of technicians had to carefully diagnose each component, identify the root causes of the problems, and implement the necessary repairs. 

This case highlights the importance of regular maintenance and troubleshooting to prevent major breakdowns. It also demonstrates the complexity of modern HVAC systems and the need for skilled technicians to diagnose and repair them effectively.

The successful restoration of the Carrier 30HXC chiller is a testament to the expertise and dedication of all technicians involved. By overcoming numerous challenges and implementing targeted solutions, they were able to bring this critical piece of equipment back online, ensuring the continued operation of the facility.