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GREE U-Match 5 SERIES UNIT SERVICE MANUAL
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Drive memory chip error
Drive board is installed with
memory chip or not ?
Install the
memory chip .
Replace the drive
board .
YES
NO
3.4.38
―c4‖ ODU Jumper Cap Error
Error display:
ODU mainboard, IDU wired control and IDU receiver light board will display
c4
Error judgment condition and method:
If jumper cap model doesn‗t match with mainboard, report the error
Possible reason:
■Jumper cap is not installed
■Jumper cap model is wrong
■Detecting circuit is abnormal
Troubleshooting: