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4.2.2 Test procedure
CAUTION:
The UPS is operating normally. It may take 60 seconds to
boost up the system and perform self-test completely.
ώ Switch off the MAINS to simulate utility failure, the rectifier will turn off and the
battery should feed the inverter without interruption. At this time, the LEDs of battery
should be turned on.
ώ Switch on the MAINS to simulate utility recovery, the rectifier will restart automa-
tically after 20 seconds and the inverter will supply to the load. It is suggested to use
Dummy loads for testing. The UPS can be loaded up to its maximum capacity during
load test.
4.2.3 Maintenance BYPASS
To supply the load via Mains, you may simply active the internal mechanical bypass switch.
CAUTION:
The load is not protected by the UPS when the internal
mechanical bypass system is active and the power is not
conditioned.
Switch to mechanical bypass
CAUTION:
If the UPS is running normally and can be controlled through the
display, carry out steps 1 to 5; otherwise, jump to Step 4.
•
Open the cover of maintenance switch, the UPS turns to bypass mode automatically.
•
Turn on MAINTANCE breaker;
•
Open BATTERY breaker;
•
Switch OFF the MAINS breaker,
•
Switch OFF OUTPUT breaker;
At this time the bypass source will supply to the load through the MAINTENANCE breaker.
Switch to normal operation (from mechanical bypass)
CAUTION:
Never attempt to switch the UPS back to normal operation
until you have verified that there are no internal UPS faults
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