GREE                                                                                          GMV5 INDOOR UNIT SERVICE MANUAL   
 
139 
 
Troubleshooting: 
 
1.2.13 “L3” Water full protection   
Error display: 
IDU wired controller and IDU receive light board will display  
Error judgment condition and method: 
Check the status of IDU float switch. When water level is too high, float switch is activated, so water