Gree GMV5E Series Service Manual page 195

GREE
Troubleshooting:
2.2.4.73 "FU" Compressor 1 shell top temperature sensor error
Error display: ODU mainboard, IDU wired controller and IDU receive light board will
display
Error judgment condition and method:
Sample the AD value of temperature sensor through temperature sensor detecting circuit and judge
the range of AD value. If the sampling AD value exceeds upper limit and lower limit in 30 seconds
continuously, report the error
Possible reason：
■Poor contact between shell top temperature sensor and terminal in mainboard interface
■Shell top temperature sensor is abnormal
■Detecting circuit is abnormal
GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
191