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Aaron HooverAug 5, 2025
What to do if the KKT Chiller plant/system is malfunctioning?
- MMike PattersonAug 5, 2025
If the KKT Chiller plant/system malfunctions, begin by checking the mains connection and asymmetry relay 5A1. Then, inspect sensor 9B1, the clamp feeler, and measure its resistance. Also, check the MMC-Card, the power supply 24VDC 7U1, and fuses 7F1 and 7F2. Finally, verify fuse 28F1 and the data transfer cable, and check the overvoltage protection. These issues may arise from power failure asymmetry, over or low voltage, a defective temperature sensor, SIMATIC malfunction, or a chiller power supply issue.