Gree GRS-CQ6.0Pd/Na-K Service Manual page 133

AIR-TO-WATERHEATPUMP
3.2.7 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
Check if both the indoor
and outdoor units are
powered on?
Yes
Check if the connection
of the communication
line between the indoor
and outdoor units are in
good condition?
Yes
See if the error is
eliminated after the main
board of the indoor unit
is replaced
No
See if the error is
eliminated after the main
board of the outdoor unit
is replaced?
Yes
Record and report the
actual condition
Fig. 3.2.7 Flowchart of diagnosis of Communication Error between the Indoor and
Check if the connection
No
of the power cords of the
indoor and outdoor units
are in good condition?
Yes
See if the error is
No
eliminated after the
communication line is
connected properly?
Yes
Outdoor Units
MAINTENANCE
See if the error is
No
eliminated after the
power cords are
connected properly?
Yes
No
Yes
No
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