Gree GUD50PS/A-T - Post-Installation Procedures; Installation Checks and Test Running

GREE U-Match 5 SERIES UNIT SERVICE MANUAL
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3.4.14 ―C5‖ IDU Jumper Cap Error
Error display: IDU wired control and IDU receiver light board will display C5
Error judgment condition and method:
If jumper cap model doesn‗t match with mainboard, this error will be reported.
Possible reason:
■Jumper cap is not installed.
■Jumper cap model is wrong.
■Detecting circuit is abnormal.
Troubleshooting：
3.4.15 ―EE‖ IDU or ODU Memory Chip Error
Error display: IDU wired control,IDU and ODU receiver light board will display EE
Error judgment condition and method:
If ODU mainboard cannot read the memory chip, this error will be reported.
Possible reason:
■ Memory chip on the ODU mainboard is damaged.
■. Memory chip is weakly welded.
■. Memory chip lead is short-circuited.