Carrier X-POWER Series Service Manual page 146

R410A DC Inverter Series
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)
No
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)
No
Outdoor main control board is damaged
2-core shielded wire (
164
×
)
3-core shielded wire (
Carrier service manual
Yes
Reset the ODU addresses
Replace the
Yes
wires to 3-core shielded wire,
reconnect the communication
wire
Replace outdoor main control board
√
)
communication
Troubleshooting