GREE DC INVERTER HEAT PUMP CONDENSING UNIT SERVICE MANUAL
35
3.4.7 “e1” High-Pressure Sensor Error
Error display:
ODU mainboard LED displayer
Sample the AD value of pressure sensor through pressure 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.
■Poor contact between pressure sensor and terminal in mainboard interface.
■Pressure sensor is abnormal.
■Detecting circuit is abnormal.
Troubleshooting
：
3.4.8 “e3” Low pressure sensor error
Error display:
ODU mainboard LED displayer
Sample the AD value of pressure sensor through pressure 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.
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