Malfunction Display: Communication Error - Gree R410A Service Manual

Super Free Match
Service Manual

3.5 Malfunction display: Communication error

MAINTENANCE 138
Communication error
Yes
Check the
cable of indoor unit: is it
properly connected?
Yes
Check the
transmission line between outdoor
unit and BU module: is it properly
connected?
Yes
Measure
the transmission line: is it
through?
Yes
Check the
power of the unit: is it
turn on?
Yes
Are the
address of BU modules in the
same system repeated?
Yes
Is there
any equipment which can
emit electromagnetic waves near
the unit?
Yes
The transimission line is too long
No
Check the orientation of plug
and socet
No
Check the orientation of plug
and socet
No
Replace the transimission line
No
Turn on the power
No
Change the repeated address codes
No Remove the equipments 1
meter away from the unit
Refer to the recommended
transmission line