Gree Ultra Heat GMV-VQ72W/A-F, Руководство по обслуживанию

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Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE
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NOTE1: If the enquired IDU is normal, no fault code will be displayed in the temperature area; if the
unit indoor has multiple faults, fault codes will be displayed in the temperature area at an interval of 3
seconds.
NOTE2: Press the
―ON/OFF‖ button on the interface of IDU project number and fault enquiry to exist
the parameter enquiry interface.
2 EXCEPTIONS ANALYZING AND TROUBLESHOOTING
2.1 Form Analyzing
Fault
code
Fault Possible reasons Solution
C0
Communication
failure between
indoor and ODUs
and IDU's
communicator
1) The communication cable is not
connected.
2) The communicator is
disconnected.
3) The communication cable is
poorly connected.
4) The communicator controller is
faulty.
If C0 is not displayed on the main board of the
ODU, check the network between the IDU and
communicator. If C0 is displayed, check the network
between the IDUs and ODUs and between the IDU
and communicator as follows:
1) Check if the cables connecting the main board of
the ODU and the IDU and connecting the IDU and
communicator are loose. If yes, reconnect them;
2) Check if the cables connecting the main board
and IDU and connecting the IDU and communicator
are broken. If yes, replace the cables;
3) Check the contact of the communication cables;
4) Replace the main board. If the fault is solved, the
main board is faulty. Replace the IDU. If the fault is
solved, the IDU is faulty.
C2
Communication
failure between main
control board and
inverter compressor
drive
1) The communication cable is not
connected.
2) The communicator is
disconnected.
3) The communication cable is
poorly connected.
4) The communicator is faulty.
1) Check if the cable connecting the main board and
the compressor's drive board is loose. If yes,
reconnect it;
2) Check if the cable connecting the main board and
compressor's drive board is broken. If yes, replace
the cable;
3) Check the contact of the communication cable
connecting the main board and compressor's drive
board;
4) Replace the main board. If the fault is solved, the
main board is faulty. Replace the compressor's
drive board. If the fault is solved, the compressor's
drive board is faulty.
C3
Communication
failure between main
control board and
variable frequency
fan drive
1) The communication cable is not
connected.
2) The communicator is
disconnected.
3) The communication cable is
poorly connected.
4) The communicator is faulty.
1) Check if the cable connecting the main board and
the fan's drive board is loose. If yes, reconnect it;
2) Check if the cable connecting the fan's drive
board and main board is broken. If yes, replace the
cable;
3) Check the contact of the communication cable
connecting the fan's drive board and main board;
4) Replace the main board. If the fault is solved, the
main board is faulty. Replace the fan's drive board.
If the fault is solved, the fan's drive board is faulty.
C5
Project number
conflict
1) Multiple IDUs share one project
number. 1) Change conflicting project numbers and ensure
that no IDU
‘s project number is repeated.
C6
Outdoor unit number
inconsistency
warning
1) Communication cables between
ODUs are loose.
2) Communication cables between 1)If the communication cable is loose, reconnect it;
2) If the communication cable is broken, replace it;
3) Check contact of the communication cable;