Vertiv Tech EXS 0080kTK16FN01000, Руководство пользователя

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Vertiv | Liebert EXS 80kVA UPS | User Manual 83
Parallel System and LBS System
The following procedures apply when one UPS module must be isolated from the parallel system for repair due
to serious fault:
1. Unplugging the EPO terminal stops the operation of rectifier, inverter, bypass, and battery, but this action will
not affect other UPSs in parallel system to normally power the load.
2. Disconnect the main input switch Q1, bypass input switch Q2, output switch Q5 of the UPS. At present, all
the internal power supply is off, and the LCD no longer displays.
Warning
1. Post a label at the AC input distribution (generally far away from the UPS) to alert that the UPS maintenance is being
operated.
2. Wait 10 minutes for the internal DC bus capacitance discharging. Then the UPS is completely shut down.
6.4.6. Procedures for Inserting One Isolated UPS Module in Parallel System
Important
These procedures shall only be carried out by service personnel of Vertiv or under their guidance.
The following procedures are used to reintegrate a UPS module that has been previously isolated from the
parallel system:
1. The UPS internal cooling fan starts, and the rectifier executes self-check and starts to run (see Figure 5-2
for power flow page). The rectifier runs in normal state for about 30 seconds, after which the rectifier start-
up phase is complete. Please confirm that the LCD displays bypass and main input normally, and that the
current log window generates an alarm of ‘PowerCAN Comms. Abnormal’ or ‘Discrete Bus Comms. Abnormal’,
otherwise you should check that the switch Q2 and switch Q1 have been closed, and that parallel cables of
each UPS have been well connected.
2. Refer to 6.4.2 Parallel System Parameters Setting for the parallel parameters setting for each UPS. Carry out
the following procedures if the UPS is running normally.
3. Press the power button of one UPS, and press the Enter key to start the UPS. Then the run indicator will be
on.
4. After this UPS runs in Inverter mode, close the external output switch (if any), and connect this UPS to the
parallel system.