Gree UML600H/A-MP Service Manual page 92

GREE
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：
1) Poor contact between ambient temperature sensor and terminal in mainboard interface.
2) Ambient temperature sensor is abnormal.
3) Detecting circuit is abnormal .
(20) "d4" Inlet pipe temperature sensor error
Error display: wired controller of IDU and the dash receiver of IDU 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 5 seconds continuously, report the error.
Possible reason：
1) Poor contact between inlet pipe temperature sensor and terminal in mainboard interface.
2) Inlet pipe temperature sensor is abnormal.
3) Detecting circuit is abnormal.
(21) "d5" midst pipe temperature sensor error
Error display: IDU displays
Applicable mode: all indoor units.
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：
1) Poor contact between midst pipe temperature sensor and terminal in mainboard interface.
2) Midst pipe temperature sensor is abnormal.
3) Detecting circuit is abnormal.
Duct type Ducted Type Split Air-Conditioner Units
.
92
.