Gree GMV-224WM/B-X, Service Manual

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GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
362
connect the communication
interfaces.
Though lines are
normal, a software
communication fault
occurs and some or
all units' information
is not displayed.
ODUs, after being replaced with
chips or reset with DIP, are not
re-powered on.
Re-power on the ODUs.
Matched resistance is not
configured.
Refer to the network
topology in the BACnet
Technical Manual to
configure matched
resistances.
After gateway IP addresses are
modified, the gateways are not
re-powered on.
Re-power on the gateways.
The unit address configured by
the software is inconsistent with
the actual address of units.
Modify unit address
settings.
Units are not powered on. Power on the units.
ODUs or IDUs are not equipped
with chips, or chips are inversely
installed. Install the chips in a correct
direction and power on the
units.
Unit address is incorrect or
replicate. Correct the incorrect
address settings.
Though lines and
devices are normal,
information of
devices of a floor is
not displayed.
The maximum distance between
a gateway and its directly
connected ODUs exceeds 500 m.
Control the distance within
500m.
The number of the first unit is
incorrect.
Refer to the BACnet
Technical Manual to reset
the number.
Lines, devices, and
setups are all normal.
However, a software
communication fault
alarm is reported.
The display or controller does not
match units.
Check the models of the
controller and operation
panel. If they do not match
unit specification, replace
them.