Maintenance
10.4Checking UPS Status
Emerson recommends checking the UPS operation status every six months.
•Check whether the UPS is faulty: Is the Fault Indicator on? Is the UPS sounding an alarm?
•Check whether the UPS is operating in Bypass Mode. Normally, the UPS operates in Normal Mode. If it is operating in Bypass Mode, stop and contact your local Emerson representative, or Emerson Channel Support.
•Check whether the battery is discharging. When the utility input is normal, the battery should not discharge. If the UPS is operating in Battery Mode, stop and contact your local Emerson rep- resentative or Emerson Channel Support.
10.5Checking UPS Functions
NOTE
UPS function check procedures may interrupt power supply to the connected load.
Emerson recommends checking the UPS functions once every six months.
Back up the load data before conducting the UPS functions check. Procedures are as follows:
1.Press the Standby/Manual Bypass button to check whether the buzzer and indicators are normal.
2.Press the On/Alarm Silence/Manual Battery Test button to check again whether the indicators are on and the UPS is operating normally.
3.Press the On/Alarm Silence/Manual Battery Test button for three seconds after Inverter Mode. The UPS should initiate a battery
10.6Replacing the Power Module on 8000 and 10,000VA models
! CAUTION
The UPS must be switched to manual bypass before personnel begin to replace the power module.
NOTICE
During the procedure, the connected load will not be protected from power disturbances, such as spikes, sags and failure.
To remove the UPS power module without shutting off power to the connected load:
1.Place the UPS on internal bypass. This may be done by any of the three following methods:
a.Press the Off button on the front panel one time.
b.Slide the bracket away from the manual bypass switch on the rear of the UPS; this requires loosening the captive screw and sliding the bracket away from the manual bypass switch.
c.Remove the front grille covering the power module.
2.Move the manual bypass breaker on the rear of the UPS to the bypass position; this requires loosening the captive screw and sliding the bracket away from the manual bypass switch (see Figure 7).
3.Open the input circuit breaker on the rear of the UPS (see Figure 7).
4.Open the output circuit breaker on the rear of the UPS (see Figure 7).
5.Remove the top two front plastic bezels by pulling them forward.
6.Remove the power module cover grille and the battery cover grille with the screws securing them to the frame.
7.Disconnect the slotted battery connectors from the internal battery packs.
8.If additional external batteries are used, disconnect the two external battery connectors.
9.Slide power module restraint lever up out of the locked position.
10.Slide the power module out the front, supporting its weight as it is withdrawn.
33
