Gree FLEXX Series - Page 38

GREE DC INVERTER HEAT PUMP CONDENSING UNIT
35
Possible reason:
■Poor contact between temperature sensor and terminal in mainboard interface
■Temperature sensor is abnormal
■Detecting circuit is abnormal
Troubleshooting
：
Malfunction of
discharge
temperature
sensor
Check if the
discharge temperature sensor on
mainboard is inserted on the
needle stand correctly
Disconnect
the temperature sensor and
measure if its resistance is
normal
Correctly insert the
temperature sensor
on the needle stand
Replace the
temperature sensor
Replace the
outdoor
mainboard
Yes
No
No
Yes
NOTE
:
Please refer to Appendix 1 for
the relation between
temperature and resistance of temperature sensor.
3.4.8“EE” ODU Memory Chip Error
Error display:
ODU mainboard LED displayer
Error judgment condition and method:
If ODU mainboard cannot read the memory chip, this error will be reported.
Possible reason:
■Memory chip on the ODU mainboard is damaged.
■Memory chip is weakly welded.
■Memory chip lead is short-circuited.