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Error code
Display of 5 indicator lights
Fault Code
Fault classification / Fault type
Over-voltage or under-voltage protection
F7
The timer light flashes 7 times
High pressure switch protection/High pressure switch fault
Protection P2/Fault PE
The timer light flashes 5 times
Refrigerant Shortage Protection
P3
The power light flashes 6 times
Communication failure between internal main board and display board
E8
/
IPM over temperature protection
L9
The timer light flashes once
Module Temperature Overly Low Protection
Pb
The power light flashes 7 times
120N exhaust sensor fault
E4
/
Four-way valve failure
FC
/
outdoor condenser temperature sensor failure
FE
/
2#outdoor fan motor failure
FF
/