Gree GMV-1015WM/G-U, Service Manual

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Gree GMV6 DC Inverter VRF Units Service Manual
101
Yes
"Cb" IP Address
Assignment Overflow
Make sure that the number of indoor
and outdoor units in the network is less
than or equal to four according to
actual installation conditions
No
Whether there are more than
four online outdoor units in the system? Whether
the communication cables of outdoor units from
other refrigerant systems are connected
to this system?
Is the problem solved
after the indoor and outdoor units
are powered off and powered
on again?
Yes
Make sure that the number of indoor
units in the network is less than or
equal to 80 (100) according to actual
installation conditions
No
Whether the number of
online indoor units in the network
exceeds 80 (100)?
Note: When the number of indoor units is 100, engineering customization is required.
2.47 “Cd” Mode exchanger and ODU communication error
Error display:
mode exchanger main board will display
Applicable model: all mode exchangers
Error judgment condition and method:
For the mode exchanger, no ODU communication is detected in 1 consecutive minute.
Possible reasons:
■ Poor contact between mode exchanger main control board and ODU main control board terminal
■ Communication cord is abnormal
■ Circuit is abnormal
Troubleshooting:
Step 1: check the terminal between mode exchanger main board and ODU to see if it is loose or any foreign
objects inside? If yes, reconnect it after treatment;
Step 2: check if the communication cord from mode exchanger to ODU is complete, if it is damaged or short-
connected, please replace the communication cord;
Step 3: if the above inspections are normal, the detecting circuit might be abnormal, please replace the mode
exchanger main board and ODU main board in turn; then replace the main board after confirming the faulted
board.
2.48 “Cn” Mode exchanger IDU and ODU network abnormality error
Error display: mode exchanger main board will display
Applicable mode: mode exchanger
Error judgment condition and method: