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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)
E0: Communication 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 (
√
)