Client says they use many service companies for same issue the system was not cooling and keep stay above the 25 degree.
After our expert hvac team done the inspection found the system evaporator completely blocked , system chiller water circulation was not good and there was many hidden reason to block the system cooling to perform and consume more energy.
So we run the complete system deep cleaning for each internal system and keep testing. And everything back to normal system can go now to freezing level and client was very happy at the end.