Step 4 Restore the second power supply (AC power) of the heat exchanger and check the alarm LED
on the heat exchanger panel.
----End
Result
l After any input of the power supply is disconnected, the heat exchanger finishes reset self-
check and the alarm LED turns on, but the heat exchanger works in the normal state.
l After the power is restored, the alarm LED of the heat exchanger turns off, and the system
recovers.
3.5 Logging in to the System
This topic describes how to log in to theUA5000 and then commission the UA5000 through the
maintenance terminal.
3.5.1 Login in the Local Serial Port Mode
Generally, when you need to maintain, manage, and operate the device at the local end, you can
log in to the system through the serial port.
Prerequisites
l A commissioning terminal, generally a portable computer with a HyperTerminal
application and that can be connected to the UA5000 through the serial port cable must be
available.
l An RS-232 serial port cable (one end with an RJ45 connector and the other end with a DB-9
or DB-25 female connector) must be available.
Networking
Figure 3-9 shows the example network of the login to the UA5000 in the local serial port mode
Figure 3-9 Example network for the login to the UA5000 in the local serial port mode
UA5000
ETH1
COM
PC
Serial port
RS-232
Serial port cable
PVMB
ETH0
UA5000 Universal Access Unit Product
Commissioning Guide-PVM CLI 3 Stand-Alone Commissioning
Issue 04 (2012-06-25) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
27
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