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Failure code for fix frequency outdoor unit unit(AU*EAA):
Diagnostic code for the inverter outdoor unit
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Code on wired
controller
Flash times of indoor
receiver board
Room temp. sensor abnormal 01 Power LED flashes 1 time
Indoor coil temp. sensor abnormal 02 Power LED flashes 2 times
Outdoor temp. sensor abnormal 4A Power LED flashes 3 times
Outdoor coil temp. sensor abnormal 49 Power LED flashes 4 times
48 Power LED flashes 5 times
High / Low pressure abnormal 53 Power LED flashes 6 times
Communication malfunction between indoor and wired
controller
07 Power LED flashes 8 times
Communication malfunction between indoor and outdoor
abnormal
06 Power LED flashes 9 times
Drainage system malfunction 08 Power LED flashes 10 times
Alarm of exterior annunciator 0B Power LED flashes 11 times
Coil gas pipe temp. Sensor abnormal 03 Power LED flashes 12 times
Temperature protection malfunction 0D Power LED flashes 13 times
Please refers to PCB function part, page 133 and page 134.
Central
-ized
control
readout
Panel
Fault description Possible cause Remedy
1 01D E1 Fault in indoor ambient
temperature sensor
Sensor is open-circuit or
short-circuit for 2min or longer.
Restorable when given
corrective signal.
2 02D E2 Fault in indoor coil
temperature sensor
Sensor is open-circuit or
short-circuit for 2min or longer.
Restorable when given
corrective signal.
3 11D E3 Fault in outdoor ambient
temperature sensor
Sensor is open-circuit or
short-circuit for 2min or longer.
Restorable when given
corrective signal.
4 12D E4 Fault in outdoor coil
temperature sensor
Sensor is open-circuit or
short-circuit for 2min or longer.
Restorable when given
corrective signal.
5 10D E5 Overcurrent/ Power
failure
Detected CT current is above the
limit three times within 30min.
Restorable after repair.
6 14D E6 Fault with high pressure High pressure switch is activated
three times within 30min.
Restorable after repair.
9 05D E9 Communication error
between indoor and
outdoor units
Communication error lasts 4min
or longer.
Restorable when given
corrective signal.
14 15D Fault in discharging
temperature sensor
Restorable when given
corrective signal.
6 26D E6 Fault with low pressure Low pressure switch is activated
over 30s.
Restorable after repair.
Failure code for AP422ACEAA
display
Number
flashes
of
E4
Sensor is open-circuit or
short-circuit for 2min or longer.
Failure description
Over-current malfunction/Power failure
-171-