20/06/2026
The Low-Temperature (LT) compressor pack on our customers site recently experienced high oil temperatures alongside intermittent low/high oil differential pressure faults during low-load operating conditions. Initial diagnostics confirmed that both the glycol oil cooling temperature and the oil temperature leaving the heat exchanger were excellent.
Our Maintenance supervisor and industrial engineer replaced both 3-way thermostatic elements. During disassembly, our engineering team noted that one of the existing element retention baskets was loose. Our team also replaced the oil filter the week prior.
Following the replacement, both compressors were restarted and run at 100% load during system pulldown. Oil temperatures significantly reduced to a normal operating temperature of +45°c and oil pressures remained stable, during fluctuating conditions as the system load reduced.
Our engineer’s also tested the removed thermostatic elements in boiling water. Both elements actuated and opened according to OEM specifications. Consequently, these components have been cleared as fully functional and returned to the customer's on-site inventory as viable spare parts. The pack will be monitored next week during production and routine maintenance.