DNM ARC AIR CURE HEATER CABLE DEGRADATION 7 June 2022 PROBLEM DEFINITION What: Degradation of HAK Heater Cable Insulator Where: DMT1 & DMT2 Arc Air Cure When: June 7th 2022. Who: ME, EE, Control Tech Impact ( any KPI? WIP, output....): No impact to through put but can lead to long USDT if didn’t detect sooner Problem Statement (Link 4W1H): Tight space in cable tray → decrease the heat dissipation → Insulator of Heater Cable degradation First Solar Proprietary & Confidential - General 24 July 2022 © Copyright First Solar, Inc. How (detail What): Tight space in cable tray which decrease the heat dissipation 2 First Solar Proprietary & Confidential - General 24 July 2022 © Copyright First Solar, Inc. ARC AIR CURE LAYOUT 3 DMT1 Data collect table First Solar Proprietary & Confidential - General 24 July 2022 © Copyright First Solar, Inc. DMT1 DATA TABLE AND CORRECTIVE ACTION 4 BACKUP Degradation of cable at HAK U2 DMT1 short term action First Solar Proprietary & Confidential - General Degradation of cable at HAK U1 24 July 2022 © Copyright First Solar, Inc. Degradation of protection tube at HAK U2A 5 DMT2 IR SCANNING ARC AIRCURE UNIT1 First Solar Proprietary & Confidential - General 24 July 2022 © Copyright First Solar, Inc. Performed IR scanning at 3 point as picture beside. Maximum temperature is 57.1C for U1A and 69 C for U1B during tool run normally. 6 DMT2 IR SCANNING ARC AIRCURE UNIT1 First Solar Proprietary & Confidential - General 24 July 2022 © Copyright First Solar, Inc. Performed IR scanning at 3 point as picture beside. Maximum temperature is 76.7C for U1B and 70C for U1A during tool run normally. 7 DMT2 IR SCANNING ARC AIRCURE UNIT1 First Solar Proprietary & Confidential - General 24 July 2022 © Copyright First Solar, Inc. Performed IR scanning at 4 point as picture beside. Maximum temperature is 64.6C for U2A and 65.7C for U2B during tool run normally 8 DMT2 IR SCANNING ARC AIRCURE UNIT1 First Solar Proprietary & Confidential - General 24 July 2022 © Copyright First Solar, Inc. Performed IR scanning at 4 point as picture beside. Maximum temperature is 75.6C for U2B and 74.7C for U2A during tool run normally 9 SHORT-TERM ACTION First Solar Proprietary & Confidential - General 24 July 2022 © Copyright First Solar, Inc. Currently, we barrier for prevent access to danger area. We will discuss ME team to take long-term action 10