Huawei NetCol5000-A - Connecting the Outdoor Unit On;Off Signal Cable

NetCol5000-A 42 kW Air Cooled In-row Precision Air
Conditioner
User Manual
3 Installation Guide
Issue 01 (2017-07-27)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
68
3.11.2.1 Connecting the Outdoor Unit On/Off Signal Cable
Context
The outdoor unit signal cable can connect to a dry contact or an RS485 port (by default).
Outdoor fan control mode is set to Communicate by default. If the signal cable connects to
a dry contact, set Settings > System Settings > Outdoor Fan > Outdoor fan control mode
to Dry contact.

If the signal cable connects to a dry contact while Outdoor fan control mode is set to
Communicate, the Outdoor fan communication failure alarm will be displayed on the
LCD.

If the signal cable connects to an RS485 port while Outdoor fan control mode is set to
Dry contact, the Comp discharge HP alarm will be displayed on the LCD after the
compressor starts.

If the Outdoor fan control mode is changed on the screen, the screen will restart.
Procedure
Step 1 Route the cable through the cable hole on the top or at the bottom of the cabinet.
Step 2 Connect the signal cable.
Remove the female connector from the interconnection terminal. After the cable is connected
to the female connector, reconnect the connector to the interconnection terminal.

(RS485 connection) Connect one end of the cable to points 1, 2, and 3 on the external
signal port X302 and the other end to ports 3, 4, and 5 on the outdoor unit.