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Ultron NT Series

7.2.3.1 From Normal Mode to Manual Bypass Mode (Single)

WARNING:

,I\RXSHUIRUPWKHIROORZLQJWXUQRႇSURFHGXUHVDOOSRZHUVXSSO\LQJWRWKH

836ZLOOEHFRPSOHWHO\FXWRႇ3OHDVHPDNHVXUHWKHFULWLFDOORDGVFRQQHFWHG

to the UPS have already been safely shut down before you perform the turn-

RႇSURFHGXUHV

1. Press the ‘OFF¶DQGµ ¶EXWWRQVVLPXOWDQHRXVO\IRUVHFRQGV$IWHUWKHUHVHUYH

$&SRZHULVQRUPDOWKHYROWDJHDQGIUHTXHQF\RIWKHUHVHUYH$&SRZHULVZLWKLQ

the setup range), the inverter will be turned off immediately and it will be the

reserve AC power to supply power to the connected loads. At the same time, the

LCD will display ‘Bypass Mode¶

 7XUQRႇHDFKH[WHUQDOEDWWHU\FDELQHW¶VBattery breaker.

 7XUQRႇWKH5HFWL¿HU,QSXW breaker or switch.

4. (1) Wait about 5 minutes for the DC CAP to discharge, and ensure that the LCD

shows the battery voltage lower than 5V.

Or, (2) Press the ‘ON¶DQGµOFF¶EXWWRQVVLPXOWDQHRXVO\IRUVHFRQGVWROHWWKH

DC CAP to discharge, and ensure that the LCD shows the battery voltage lower

WKDQ9$IWHUFRQ¿UPDWLRQSUHVVWKHµOFF¶DQGµ

¶EXWWRQVVLPXOWDQHRXVO\IRU

VHFRQGVWR¿QLVKWKHGLVFKDUJHSURFHVV

5. Turn on the Manual Bypass breaker or switch. The connected loads will be

power-supplied by the manual bypass and the LCD will display ‘Manual Bypass

ON¶

 7XUQRႇWKHUPS Output breaker or switch and Reserve Input breaker or switch.

7. Disconnect all fuses. After that, the LCD will be OFF.

8. When the UPS is running in Manual Bypass Mode, there is no high voltage

inside the UPS except the wiring terminals and Manual Bypass breaker or

VZLWFK'RQRWWRXFKWKH836¶VZLULQJWHUPLQDOVDQGManual Bypass breaker or

switch during UPS maintenance process to avoid electric shock.

Delta NT Series User Manual

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