28 User Guide APC Silcon 10-40kW 400V UPS

990-4043
Maintenance & Testing

6.0 Maintenance & Testing

UPS maintenance should be carried out by trained service engineers only. Service and
maintenance contract is recommended.

6.1 Fan

It is recommended to replace fans every 3 years.

6.2 Battery Monitoring Test

Systems with built-in batteries have a standard battery monitoring feature (optional in other
systems).
Battery Test Results:
1. Battery OK. Back-up time normal.
2. Reduced battery capacity - “Battery weak” message appears.
3. Battery capacity too low - “Battery defective” message appears.
Carry out battery monitoring test by discharging max. 25% of battery energy. For systems with
no battery monitor/no excess back-up time, a battery capacity test is recommended every 6
months.
Carry out battery tests when load is least affected.

6.3 Battery Capacity Test

CAUTION!
Allow 16 hours to restore full back-up time after battery capacity tests.