Gree GMV-ND07PLS/A-T(U) Service Manual page 149

GREE
Check the status of IDU float switch. When water level is too high, float switch is activated, so water
full protection happens.
Possible reason:
IDU is installed improperly

Drainage pump is broken

Float switch operates abnormally

IDU mainboard is abnormal

Troubleshooting:
Multi Variable Air Conditioners Indoor Unit
143