42
Waring
Once the cover on the maintenance bypass breaker is removed, the system will transfer to bypass
mode automatically.
Waring
Before making this operation, confirm the messages on LCD display to ensure that bypass supply
is regular and the inverter is synchronous with it, so as not to risk a short interruption in powering
the load.
Danger
Even with the LCD turned off, the terminals of input and output may be still energized.
Wait for 10 minutes to let the DC bus capacitor fully discharge before removing the cover.
4.3.5 Switching the UPS into normal mode from maintenance bypass mode
These following procedures can transfer the load from the Maintenance Bypass mode to inverter
output.
1. After finish of maintenance. One by one to turn on the output breaker, the bypass input breaker,
the input breaker (external or from POD) and the external battery breaker.
2. After 30S, the bypass indicator LED goes green and the load is powered through maintenance
bypass breaker and static bypass.
3. Turn off the maintenance bypass breaker and fix the protection cover, and then the load is
powered through static bypass. The rectifier starts followed by the inverter.
4. Operate “Fault Clear” as per chapter 3.4.5.
5. After 60 seconds, the system transfers to normal mode.
Waring
The system will stay on bypass mode until the cover of maintenance bypass breaker is fix.
4.4 Battery Maintenance
If batteries not discharged for a long time, it is necessary to test the condition of batteries.
Touch the icon
, and input the password “1203”, the system transfers into Battery Mode
for discharge. If no human intervention, the system will continue to discharge until the alarm of
“Battery low voltage” is given. Users can stop the discharge by touching the icon
.
Touch the icon
, the system will discharge for about 30 seconds, and then re-transfer
to normal mode.
