GREE Duct type split Air conditioner Inverter Series
97
(28) “F0” poor main board of outdoor unit
Error display: the main board of outdoor unit and indoor unit will display .
Applicable model: all outdoor units.
Error judgment condition and method
：Check the reading of address chip, memory chip and clock
chip of ODU main board is normal, if not, it can be judged as abnormal.
Possible reason
：
1) The clock chip on the main board is damaged.
2) The memory chip on the main board is damaged.
3) The address chip on the main board is damaged.
Troubleshooting
：
1) Replace the small CPU board.
2) Replace the control board.
3) Replace the control board.
(29) “F5” malfunction of discharge temperature sensor for compressor 1
Error display: the main board of outdoor unit and indoor unit will display .
Applicable model: all outdoor 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 30 seconds continuously, report the error.
Possible reason
：
1) Poor contact between discharge temperature sensor and terminal in mainboard interface.
2) The discharge temperature sensor is abnormal.
3) The detected circuit is abnormal.
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