DC Inverter Multi
VRF Service Manual
177
2�4 Communication Failure
Error display on hand controller: E6
Outdoor units mainboard indicator: led4: dark; led3: blink; led2: blink; led1:dark
Indoor units mainboard indicators:
Patio indoor units: red led: blink:red led:blink; green led:blink; yellow led:blink
FY wall-mounting motor: red led:blink(dark at the same time); yellow led:blink
New FY wall-mounting motor: red led:blink; green led:blink; yellow led:blink
Hanging indoor units: red led:blink; green led:blink; yellow led:blink
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
Communication error
Check if the
communication line of indoor
unit is connected？
Check the orientation
of plug and socket
Measure if the
communication line is through?
Replace
the communication line
Check if the
communication line of indoor and
outdoor unit is connected c
orrectly?
Check the orientation
of plug and socket
Check if the
two ends of communication line
are mounted with
magnetic ring?
Please mount the
included magnetic ring
Check if the outdoor
unit is electrically powered?
Please supply power
to the outdoor unit
If the address
codes of indoor units in
the same system are
repeated?
Change the repeated
address codes
If the address
code of wired controller
complies with the address
code of the connected
indoor unit?
Change the address
code of wired controller
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