TOSHIBA
25
8.0
Preventive and Scheduled Maintenance/Parts
8.1
Preventive Maintenance
Toshiba’s Uninterruptible Power Systems have been designed to provide years of
trouble-free operation requiring a minimum of preventive maintenance.
The best preventive measure that the UPS user can take is to keep the area around the
unit, particularly the air inlet vents, clean and free of moisture and dust accumulations.
If the atmosphere of the installation site is very dusty, use a vacuum cleaner to
periodically remove dust accumulations from the system. Schedule authorized service
centers to perform internal parts inspections annually.
CAUTION
Before performing any maintenance the technician should be familiar
with and follow the important safety instructions located on pages 5,
6 and 7.
WARNING
Proper maintenance of the battery system by a qualified service
technician is essential to the safety and reliability of your UPS
system.
8.2 Parts
Replacement
The following list shows intervals for periodic maintenance and replacement of certain
UPS parts.
1)
Batteries: VRLA batteries are maintenance free with respect to electrolyte only. The
charging voltage, temperature, performance and connection resistance must be
monitored periodically. Necessary corrective actions must be made in order to
assure safe reliable power is supplied by the UPS. The aforementioned items affect
the life of batteries, so replacement should be done once every 3 to 5 years at a
minimum. All of the batteries must be replaced at the same time.
Quarterly maintenance
a) Visual checks
1) Leakage
2) Corrosion on positive terminal
b) Check battery temperature at the negative terminal.
c) Measure and record the system float charging voltage.
d) Measure and record the individual unit’s float charging voltage.
Semi-Annual maintenance
a) Repeat the quarterly checks.
b) Perform a 10-second high rate (e.g. 100 amp) load test on the
individual batteries.
c) Optionally test for the purpose of trending the battery over time.
d) Re-torque all inter-battery connecting hardware (if applicable).
e) Perform inter-battery connector resistance checks.
2)
Aluminum electrolytic capacitors: Replace once every 5 years.
3)
Fuses: Replace once every 7 years.
4)
Cooling fan: Replace once every 3 years.
