GREE DC INVERTER HEAT PUMP CONDENSING UNIT
33
Possible reason:
■Poor contact between ambient temperature sensor and terminal in mainboard interface
■Ambient temperature sensor is abnormal
■Detecting circuit is abnormal
Troubleshooting
：
NOTE:
Please refer to Appendix 1 for
the relation between
temperature and resistance of temperature sensor.
3.4.6 “F4” Discharge Temperature Sensor Error
Error display:
ODU mainboard LED displayer
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.
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