GMV5 Home DC Inverter Multi VRF Units
266
Communication
faiure between
indoor and outdoor
unit and indoor units
wired controller
communication
cable is not
connected.
2. The
communication
cable is
disconnected.
3. The
communication
cable is in poor
connection.
4. The controller is
faulty
check the network between the IDU and wired controller. If
C0 is displayed, check the network between the IDUs and
between the IDU and wired controller as below:
1.Check if the cables connecting the control board of the
ODU and thd IDU and connecting the IDU and wired
controller are loose. If they are, reconnect them;
2. Check if the cables connecting the control board and IDU
and connecting the IDU and wired controller are broken. If
they are, replace the cables;
3. Please check the contact of the communication cables;
4.Replace the control board. If the fault is solved, the
control board is faulty. Replace the IDU. If the fault is
solved, it means the mainboard of indoor unit is faulty.
Communication
failure between main
control board and
inverter compressor
drive
1. The
communication
cable is loose.
2. The
communication
cable is
disconnected.
3. The
communication
cable is in poor
connection.
4. The controller is
faulty.
1.,Check if the cable connecting the control board and the
compressors drive board is loose. If it is, reconnect it.
2.Check if the cable connecting the control board and
compressor’s drive board is broken. If it is, replace the
cable;
3.Check the contact of the communication cable connecting
the control board and compressors drive board;
4.Replace the control board. If the fault is solved, the
control board is faulty; replace the compressors drive
board, if the fault is solved, it means the compressors drive
board is faulty.
Communication
failure between main
control board and
inverter fan drive
1. The
communication
cable is loose.
2. The
communication
cable is
disconnected;
3. The
communication
cable is in poor
connection.
4. The controller is
faulty.
1.Check if the cable connecting the fans drive board and
the compressors drive board is loose, if it is, reconnect it;
2.Check if the cable connecting the fans drive board and
compressors drive board is broken, if it is, replace the
cable;
3.Check the contact of the communication cable connecting
the fans drive board and compressors drive board;
4.Replace the main control board, if the fault is solved, the
main control board is faulty; replace the fans drive board, if
the fault is solved, the fans drive board is faulty.
Indoor unit project
number conflict
warning
1 Project numbers
conflict with each
other.
1 Change conflicting project numbers and ensure that no
IDUs project number is repeated.
Outdoor unit number
inconsistency
warning
1. Communication
cables between
ODUs are loose.
2. Communication
1,If the communication cable is loose, reconnect it.
2,If the communication cable is broken, replace it;
3Check contact of the communication cable;
4Replace the main control board.
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