Gree GMV-ND07PLS/A-T(U) Service Manual page 145

GREE
Through testing the IDU address chip and IP address, if address chip cannot be read, IDU IP is 0 or
IP is in conflict, report the error.
Possible reason:
ODU allocated address is wrong

IDU treatment is wrong

Address chip is abnormal

Troubleshooting:
1.3.8 "dH" wired controller circuit board error
Error display: IDU wired controller and IDU receive light board will display
Error judgment condition and method:
Wired controller IIC communication is abnormal
Possible reason:
Communication of wired controller touch button board and display board IIC is abnormal;

Read and write of wired controller memory chip IIC is abnormal (when memory chip is existed);

Troubleshooting:
1.3.9 "dC" Capacity DIP switch setting error
Error display: IDU wired controller and IDU receive light board will display
Error judgment condition and method:
Multi Variable Air Conditioners Indoor Unit
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