18.20 pm. Production line FL 3 inform to Engineering the temperature abnormal condition.
18.30 pm. Engineering go to Production line FL 3 recheck condition main machine ( AHU No.1-14 ) recheck condition MAU 1-2 condition normal.
18.45 pm Engineering rechecks condition main machine Chiller & Cooling Tower normal.
- Production line informs machine CTS 1-8 Stop process.
19:20 pm Engineer action opens by pass valve at FL 3M & Recheck condition controller 2 way valve by PLC on UPS room. PLC controller show alarm error cannot controller 2 way valve supply chilled water to AHU