Gree GUD140W/NhA-T - F1‖ Evaporator Temperature Sensor Error

GREE U-Match 5 SERIES UNIT SERVICE MANUAL
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Troubleshooting：
3.4.9 ―F1‖ Evaporator Temperature Sensor Error
Error display: IDU wired control and IDU receiver light board will display F1
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 5 seconds continuously, report the error.
Possible reason:
■Poor contact between temperature sensor and terminal in mainboard interface
■Temperature sensor is abnormal
■Detecting circuit is abnormal