48 Chapter 5 Operating Instructions
Figure 12.1: Example of Power walk-in function and Power walk-in delay timer
Note: From the UPS rack unit point of view, there is no information, if the UPS rack unit is supplied by utility or by
genset. Power walk-in function and Power walk-in delay timer will be applied after each switching from battery mode
to normal mode.
6.10 Operation Instruction For Power Module Maintenance
Only a trained user can perform the following procedures
Maintenance guidance for power modules
If the system is normal mode and the bypass is normal:
1. If the UPS does not contain any redundant module, press inverter off button on the front panel to manually power
off the inverter and the UPS transfers to bypass.
2. Disconnect the Ready switch of the main power module that needs maintenance or repair.
3. Loosen the screws of the main power module and remove the module after 2 minutes.
Note
Note: To ensure the safety, be sure to use a multimeter to measure the DC bus capacitor voltage and ensure the voltage is below
60V before operation.
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