Gree GMV-ND100L/A-T Service Manual page 141

GREE
1.2.7 "dA" IDU network address error
Error display: IDU wired controller and IDU receive light board will display
Error judgment condition and method:
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:
1.2.8 "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:
GMV5 INDOOR UNIT SERVICE MANUAL
136