GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
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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 humidity sensor and terminal in mainboard interface
■Humidity sensor is abnormal
■Detecting circuit is abnormal
Troubleshooting:
2.2.4.48 “d9” Jumper cap error
Error display:
IDU wired controller and IDU receive light board will display
Error judgment condition and method:
Possible reason：
If jumper cap model doesn’t match with mainboard, report the error
■Jumper cap is not installed
■Jumper cap model is wrong
■Detecting circuit is abnormal
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