Error Code Analysis:
00 = normal
AU = fault combination of indoor and outdoor units.
U0 = lack of refrigerant gas.
U2 = voltage drop or excessive voltage of the main circuit.
U4 = signal error between internal and external unit.
A1 = malfunction of the inner circuit board.
A5 = high pressure control or freeze protector.
A6 = fault in the engine internal fan.
C4 = the defective heat emulator temperature sensor.
C9 = faulty temperature sensor
EA = error communicating cooling-heating.
E1 = breakdown of the four circuits
E5 = OL started.
E6 = start of the disabled compressor.
E7 = motor damage to the external fan.
E8 = current overload.
F3 = control of external high pressure discharge pipe.
F6 = high pressure control external cooling.
H0 = damage to the external sensor.
H6 = system shutdown due to erroneous position detection sensor.
H8 = Current sensor failure continues.
H9 = defective suction air temperature sensor.
J3 = temperature sensor defective discharge pipe.
J6 = temperature sensor defective heat exchanger.
L3 = thermal damage to electrical parts.
L4 = high temperature heat sink reversal circuit.
L5 = output overcurrent.
P4 = temperature sensor defective condenser reversing circuit.
