R410A DC Inverter Series Carrier service manual
164 Troubleshooting
4. Troubleshooting
4.1 E0: Communication error between outdoor units (Only display on faulty slave unit, all the ODU in
standby)
ommunication error between outdoor units
ODU addresses (ENC1) are set incorrectly (the
master unit address should be set as 0, slave
units addresses should be set from 1 to 3, and
the addresses should not be repeated in one
system)
Reset the ODU addresses
ODU communication wires are connected
incorrectly (all the wires for H1, H2, E
connections should be 3-core shielded wire,
the wiring should be polarity connection (H1
connect to H1, H2 connect to H2), the wiring
should not be short circuit)
Replace the communication
wires to 3-core shielded wire,
reconnect the communication
wire
Outdoor main control board is damaged
Replace outdoor main control board
No
Yes
No
Yes
2-core shielded wire (×)
3-core shielded wire (√)
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