CA UT IO N : W h en th e UP S is in m ain ten an ce m o de, th e lo ad is n o t pro tected again st abn o rm al
m ain s su pply.
5.
Pressing the EPO button stops the operation of rectifier, inverter, static switch, and battery but this action will
not affect the maintenance bypass power the load normally.
N O T E: Un der m ain ten an ce m o de, th e lo ad is directly fed by th e m ain s po wer in stead o f th e pu re A C
po wer fro m th e in verter.
6. Disconnect the rectifier input switch Q1, bypass input switch Q2, and output switch Q5.
At the moment, all the internal power supply is off, and the TOUCH SCREEN does not display any more.
W A R N IN G !
1. If th e m ain ten an ce is requ ired, wait 10 m in u tes fo r th e in tern al DC bu s capacitan ce to
disch arge.
2. T h e parts o f UP S circu its also h ave h azardo u s vo ltage, th o u gh th e rectifier in pu t switch ,
bypass in pu t switch an d battery switch are disco n n ected. T h erefo re, th e UP S m ain ten an ce is
applicable to qu alified perso n n el o n ly.
3. F o r m o dels with o u t Q 1, Q 2 an d Q 5, wh en th e extern al in pu t switch is n o t disco n n ected, th ere
is a h azardo u s vo ltage in side th e UP S. F o r UP S m ain ten an ce an d du st rem o val, o th er switch es
(in clu din g extern al m ain ten an ce bypass switch es) m u st be in stalled wh en u sin g Q 3 o r th e UP S
with o u t switch o n ly.
6.3.5 Transfer from Maintenance Mode to Normal Mode
The following procedures will transfer the maintenance bypass supply mode of the UPS to the normal mode.
1.
Close the output switch Q5, external power bypass switch, bypass input switch Q2, external power main switch
and rectifier input switch Q1 in turn.
Confirm that the TOUCHSCREEN is on and the UPS runs in Bypass mode.
2.
Disconnect the maintenance bypass switch Q3.
3.
Start the system according to steps 4~6 in Startup Procedures in Normal Mode.
Now the UPS runs in Normal mode.
W A R N IN G ! Yo u m u st start th e bypass first, an d th en disco n n ect th e m ain ten an ce bypass
switch ; o r it m ay cau se o u tpu t lo ad po wer failu re.
At the moment, the load has transferred to UPS normal mode.
6 Single UPS Operation Introduction
116
Vertiv™ Liebert® APM Plus User Manual
Summary of Contents for APM Plus 0500kMK16FN02000
Page 1: ...Vertiv Liebert APM Plus User Manual 50 500 kVA UPS...
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Page 34: ...2 Overview 26 This page intentionally left blank Vertiv Liebert APM Plus User Manual...
Page 45: ...Four switches 500 kVA 3 Mechanical Installation 37 Vertiv Liebert APM Plus User Manual...
Page 76: ...Figure 5 11 Customize the display 5 Touch Screen 68 Vertiv Liebert APM Plus User Manual...
Page 86: ...Figure 5 20 Enable module redundancy 5 Touch Screen 78 Vertiv Liebert APM Plus User Manual...
Page 91: ...Figure 5 24 Status Gauge setting options 5 Touch Screen 83 Vertiv Liebert APM Plus User Manual...
Page 92: ...5 Touch Screen 84 Vertiv Liebert APM Plus User Manual...
Page 94: ...5 Touch Screen 86 Vertiv Liebert APM Plus User Manual...
Page 95: ...Figure 5 26 Unit status Bypass details 5 Touch Screen 87 Vertiv Liebert APM Plus User Manual...
Page 96: ...Figure 5 27 Unit status Battery details 5 Touch Screen 88 Vertiv Liebert APM Plus User Manual...
Page 97: ...Figure 5 28 Unit status Load details 5 Touch Screen 89 Vertiv Liebert APM Plus User Manual...
Page 100: ...5 Touch Screen 92 Vertiv Liebert APM Plus User Manual...
Page 112: ...5 Touch Screen 104 This page intentionally left blank Vertiv Liebert APM Plus User Manual...
Page 184: ...12 Specifications 176 This page intentionally left blank Vertiv Liebert APM Plus User Manual...