Gree GMV5 Series Service Manual page 365

Though lines are
normal, a software
communication fault
occurs and some or
all units' information
is not displayed.
Though lines and
devices are normal,
information of
devices of a floor is
not displayed.
Lines, devices, and
setups are all normal.
However, a software
communication fault
alarm is reported.
GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
ODUs, after being replaced with
chips or reset with DIP, are not
re-powered on.
Matched resistance is not
configured.
After gateway IP addresses are
modified, the gateways are not
re-powered on.
The unit address configured by
the software is inconsistent with
the actual address of units.
Units are not powered on.
ODUs or IDUs are not equipped
with chips, or chips are inversely
installed.
Unit address is incorrect or
replicate.
The maximum distance between
a gateway and its directly
connected ODUs exceeds 500 m.
The number of the first unit is
incorrect.
The display or controller does not
match units.
connect the communication
interfaces.
Re-power on the ODUs.
Refer to the network
topology in the BACnet
Technical Manual to
configure matched
resistances.
Re-power on the gateways.
Modify unit address
settings.
Power on the units.
Install the chips in a correct
direction and power on the
units.
Correct the incorrect
address settings.
Control the distance within
500m.
Refer to the BACnet
Technical Manual to reset
the number.
Check the models of the
controller and operation
panel. If they do not match
unit specification, replace
them.
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