UPS5000-A-400 kVA
User Manual (50 kVA, PF=0.9)
2 Overview
Issue 03 (2020-01-10)
Copyright © Huawei Technologies Co., Ltd.
23
Table 2-1
Ports on the ECM
Silk Screen
Description
PARALLEL
The PARALLEL port transmits parallel signals.
BSC
This port is used in a dual-bus system to balance output frequencies and
phases between UPS systems, ensuring that two buses can switch with
each other.
BSC cables are hot-swappable.
For a single UPS, the parallel cable is not needed.
Table 2-2
Indicator description
Indicator
Color
Status
Description
NORMAL
Green
Steady on
This ECM is the active ECM.
Blinking at 0.5
Hz
This ECM is the standby ECM and it is
ready.
Off
This ECM is not ready or the CPLD of
this ECM is being upgraded.
Blinking at 4 Hz
The DSP of the ECM is being upgraded or
not configured.
ALM
Yellow
Steady on
The ECM has a minor alarm, but it does
not need to be replaced.
Off
The ECM has no minor alarm or the DSP
of the ECM is being upgraded.
FAULT
Red
Steady on
The ECM has a critical alarm.
Off
The ECM has no critical alarm or the DSP
of the ECM is being upgraded.