KE 4256-3230 Keatec T Series UPS 10-40K 380Vac Users Guide English 20170126 This manual is for qualified personnel only.
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I
f the UPS is running normally and can be controlled through the display, carry out
steps 1 to 5; otherwise, go to Step 4.
1. Open the cover of maintenance switch, the UPS turns to bypass mode automatically.
2. Turn on MAINTANCE breaker
3. Open BATTERY breaker
4. Switch OFF the MAINS breaker
5. 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!
Do not attempt to switch the UPS back to normal operation until it has been
verified that there are no internal UPS faults
◆
Switch ON the output breaker.
◆
Switch ON the input breaker.
The UPS powers from the static bypass instead of the maintenance bypass, the bypass LED will
light up.
◆
Switch OFF the maintenance bypass breaker, the output is supplied by the static bypass of
the UPS.
◆
Replace the maintenance switch cover.
The rectifier will operate normally after 30 seconds. If the inverter works normally, the system
will be transferred from bypass mode to normal mode.
4.2.4 Cold start procedure
CAUTION!
Follow these procedures when the input AC Utility Failure, but battery is
normal.
◆
Set the Battery Breaker to the “ON” position for long run UPS.
◆
Switch ON the power switch for standard UPS.
◆
Turn on the Output switch.
◆
Switch ON the power switch (power will feed to auxiliary power board).
