Huawei NetCol5000-A021HN12D 20020E1 Quick Manual page 16

Connecting the Outdoor Unit Power Cable
8.2
Connect one end of the cable to the AC3 terminal on the electric control box of the indoor unit (PE
cable to the PE screw on the right of AC3), and the other end to the outdoor unit terminal block.
The cable can be routed through a top or bottom cable hole.
1. Indoor wiring
Top cabling
2. Outdoor wiring
8.3
Connecting the Signal Cables, Water Sensor
1. Outdoor unit signal cables can be connected to dry contacts or RS485 ports. Signal cables are
connected to RS485 ports by default (the Outdoor fan control mode is set to Communicate
by default). If signal cables are connected to dry contacts, set Settings > System Settings >
Outdoor Fan > Outdoor fan control mode to Dry contact.
2. If signal cables are connected to dry contacts while the Outdoor fan control mode is set to
Communicate, Outdoor fan communication failure will be displayed on the screen.
3. If signal cables are connected to RS485 ports while the Outdoor fan control mode is set to
Dry contact, Comp discharge HP will be displayed on the screen after the compressor starts
working because the indoor unit cannot control the startup of the outdoor fan.
Bottom cabling
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