Gree U-Match 6 Series - Page 67

GREE U-Match 6 SERIES UNIT SERVICE MANUAL
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3.4.6 “E6” Communication Error
Error display:
ODU mainboard, IDU wired controller and IDU receiver light board will display E6
Error judgment condition and method:
If no communication between ODU and IDU in continuously 180s, this error will be reported.
Possible reason:
■Communication wire is connected improperly or loose.
■Communication wire is cut off
■Communication wire is in poor connection
■Controller is abnormal
Troubleshooting:
3.4.7 “E9” Water Overflow Protection
Error display:
IDU wired controller and IDU receiver light board will display E9
Error judgment condition and method:
Check the status of IDU float switch. When water level is too high, float switch is activated, so water
full protection happens.