Fault F7: The outdoor unit overvoltage or undervoltage protection has tripped
Check whether the power supply is present and
correct. Is this normal?
NO
Switch the supply and try again as soon as this
is normal again.
YES
Check all electrical connections. Are they OK?
NO
Correct the electrical connections.
YES
Replace the outdoor unit motherboard.
Fault F9: EEPROM error
Switch the unit off for 5 seconds. Is the fault still
shown on the display?
YES
Is the EEPROM chip properly seated on the cir-
cuit board?
NO
Insert the chip properly.
YES
Replace the outdoor unit circuit board.
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