USER MANUAL-S600E
77
S600E
6.
Disconnect the rectifier input switch Q1 and bypass input switch Q2. At this point, all the internal power supplies
are deactivated and the LCD screen is switched off.
Procedures for Isolating One UPS Module from a Parallel System
The following procedures apply when it is necessary to isolate one UPS module from the parallel system for repair
due to serious malfunction:
1.
Unplugging the REPO terminal deactivates the rectifier, inverter and static switch and battery, while the other
UPS modules in the parallel system continue to supply the load as normal.
2.
When the UPS is equipped with an external battery, simply set the corresponding external battery switch to off.
3.
Set the rectifier input switch Q1, bypass input switch Q2 and output switch Q4 to off.
At this point, all the internal power supplies are deactivated and the LCD screen is switched off.
Procedures for Inserting One UPS Module into a Parallel System
The following procedures are used to reintegrate a UPS module that has been previously isolated from the parallel system:
At this point, the system is switched on.
1.
Close the bypass input switch Q2.
2.
Close the output switch Q4, and press the power button for two seconds.
2.
Hazardous voltages may be present on some parts of the UPS, even when the rectifier input switch, bypass input switch
and battery switch are disconnected. Therefore, UPS maintenance should be carried out by qualified personnel only.
These procedures may only be carried out by VERTIV service personnel, or under their supervision.
Before operation, confirm that the system
capacity has sufficient redundancy to avoid system shut down due to overload.
label on the AC input distribution line (generally at a distance from the UPS) to alert personnel that UPS
maintenance is in progress.
2.
Wait 10 minutes for the internal DC bus capacitors to discharge. Then the UPS is completely shut down.
e procedures may only be carried out by VERTIV service personnel, or under their supervision.
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