Powerware 9155 UPS20-30kVA - Manual (Page 34)

34 UPS 20-30 kVA, 230 V 0/60 Hz output
User’s Guide
1026743
Revision B
9. Maintenance
All operations inside the unit must be performed only by a service engineer from the
manufacturer or from an agent, authorised by the manufacturer.
The troubleshooting procedure gives simple remedial if a malfunction occurs in the UPS.
The operator should start the trouble shooting if there is an active alarm indicated on the LCD
screen. Service should be contacted if the active alarm is abnormal and displayed as a service
code.
Call service if you are not able to solve the problem.
LCD display Description Action
Overload
The connected load needs more power
than the UPS is rated to provide. The
inverter or static bypass is supplying the
excessive load level.
Shut down the least important load that
is connected to the UPS. The UPS should
switch back to normal operation once the
load level is acceptable.
Battery test failed Your batteries are detected to be faulty.
Batteries should be replaced and you need
to contact the local office or representative
of the UPS manufacturer.
Battery low
The UPS is operating in stored energy
mode. It will shut down soon due to low
battery voltage.
Make controlled shutdown of the protected
load immediately to prevent loss of data.
On battery
The UPS is operating in stored energy
mode.
Save your data and perform a controlled
shutdown of your load.
Overtemperature High UPS temperature is detected.
Check that fans are operational and
ventilation holes are not blocked. Make
sure the ambient temperature is not
excessive
Table 6 Typical alarms displayed in the LCD screen of the UPS unit.
Regular service/intervals
The UPS requires very little maintenance if installed in an appropriate environment. In order
to ensure maximum availability of the UPS, manufacturer recommends signing a proactive
service agreement with a local authorised service provider.
Maintenance Interval
Batteries change ~ 3-5 years / service
Batteries test ~ 18 months / service
Cooling fan change ~ 5 years / service
Table 7 Routine maintenance intervals recommended by the manufacturer.