Trane TVR Pro CO Series Service Manual page 59

Procedure
ODU addresses on switch ENC1 are set
Communication wires between ODUs are
not connected properly
Wires between outdoor main PCB and
electric control box communication
terminals block are loose
Replacing outdoor main PCB resolves the
Replace electric control box
communication terminals block
Notes:
1. The master unit address should be set as 0, slave units addresses should be set from 1 to 2, and the addresses should not be repeated within one system.
2. All the wires for H1, H2, E connections should be three-core shielded cable, the wiring should be connected according to polarity (H1 to H1, etc), the wiring
should not be open or short circuited.
E0
incorrectly 1
No
2
No
No
error
No
Yes
Set the ODU addresses correctly
Ensure the communication wires are
Yes
three-core shielded cable and are
connected properly
Yes
Ensure the wires are connected properly
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