Isolate the incoming source and apply Lockout/Tagout procedures to prevent accidental energization.
A offers three distinct advantages:
Check the UPS room for dust, debris, and pest infestation. Use compressed air to blow dust out of the internal chassis. ups preventive maintenance checklist format pdf
| Check | OK | Notes | |-------|----|-------| | Battery terminals tight & clean | ☐ | | | No swelling, cracks, or leaks | ☐ | | | Intercell connections torque checked | ☐ | | | Voltage per block (list below) | ☐ | | | Ambient temperature near batteries | ___ °C | | | Battery age (__ years) – replace if >5 yrs | ☐ | | 5 yrs | ☐ | |