Gree GMV5E Series - Page 173

GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
169
Troubleshooting:
2.2.4.49 “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:
2.2.4.50 “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);