Manual Bypass Mode Start-Up Procedures - Delta Ultron HPH Series User Manual

Now, the tri-color LED indicator illuminates yellow and the screen shows as follows

6.2.4 Manual Bypass Mode Start-up Procedures

WARNING:
1. For parallel units, ensure that every operation procedure mentioned below is
synchronized to all parallel UPSs.
2. For parallel application, if you just want to operate a specific UPS but not all parallel
ones, please contact Delta service personnel.
3. Please note that you can switch on the manual bypass breaker only when the UPS
needs maintenance. In manual bypass mode, the connected critical loads will be
supplied by the manual bypass and the output won't be protected. Please ensure
that the bypass AC source is normal.
4. In manual bypass mode, the connected critical loads will be supplied by the manual
bypass; thus, maintenance personnel can perform maintenance without
interrupting the power supplying to the critical loads.
5. Ensure that all of the breakers (except manual bypass breaker) are in the OFF
position, and use a voltmeter to check there is no high voltage inside the UPS.
Only after confirmation can service personnel perform UPS maintenance.
6. Please note that, during UPS maintenance process, DO NOT touch the main input,
bypass and output terminal block to avoid electric shock.
Ultron HPH Series
(Figure 6-7: Bypass Mode Screen)
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