A/A DC INVERTER U-MATCH AIR CONDITIONERS MAINTENANCE
131
Communication Error between the Indoor and Outdoor Units
E6 is displayed on the nixie tube of
the outdoor unit indicating the
communication error between the
indoor and outdoor units
See if the error is
eliminated after the main
board of the outdoor unit
is replaced?
See if the error is
eliminated after the
communication line is
connected properly?
See if the error is
eliminated after the main
board of the indoor unit
is replaced
Check if the connection
of the communication
line between the indoor
and outdoor units are in
good condition?
Check if the connection
of the power cords of the
indoor and outdoor units
are in good condition?
Check if both the indoor
and outdoor units are
powered on?
Record and report the
actual condition
See if the error is
eliminated after the
power cords are
connected properly?
Yes
Yes
No
No
No
No
Yes
Yes
Yes
No
No
Yes
Yes
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