Gree GMV6 DC Inverter VRF Units Service Manual
2.41 "CP" Fault of Multiple Main Wired Controllers
Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit
display
Fault diagnosis:
Two or more wired controllers in an HBS network are main wired controllers.
Possible causes:
■ When two (or more) wired controllers control one or more indoor units at the same time, the two
(or more) wired controllers are the main wired controllers.
Troubleshooting:
Make sure that at most two wired controllers control one or more indoor units; when two wired
controllers control one or more indoor units, enter the wired controller parameter settings (P13) to set the
address of one of the wired controllers to be 02 (that is, to be the secondary wired controller).
2.42 "Cb" IP Address Assignment Overflow
Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit
display
Fault diagnosis:
If more than four addresses are assigned to other outdoor units by the outdoor unit, the unit reports
an IP address assignment overflow.
If more than 80 (100) addresses are assigned to indoor units by the outdoor unit, the unit reports an
IP address assignment overflow.
Possible causes:
■ More than four outdoor units exist;
■ More than 80 (100) indoor units exist.
■ After replacing the main boards of the indoor units and the outdoor units, the outdoor units are not
powered off.
Troubleshooting:
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