GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
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Error judgment condition and method:
If the quantity of address that ODU allocates to other ODU modules exceeds 4, the system will
report IP address allocation overflow.
If the quantity of address that ODU allocates to IDUs exceeds 80, the system will report IP address
allocation overflow.
Possible reason
：
■ODU quantity in the system exceeds 4
■IDU quantity in the system exceeds 80
■After replacing the IDU and ODU mainboard, ODU is not de-energized.
Troubleshooting:
2.2.4.43
“d1” Indoor circuit board error
Error display:
IDU wired controller and IDU receive light board will display
Error judgment condition and method:
Check if the reading of address chip and memory chip of IDU mainboard is normal. If the data of
address chip and memory chip cannot be read, it is abnormal
Possible reason
：
■Address chip is abnormal
■Memory chip is abnormal. Replace main control board directly
Troubleshooting:
Replace main control board directly
2.2.2.44
“d3” Ambient temperature sensor error
Error display:
IDU wired controller and IDU receive light board will display
