Daikin Aurora Series Service Manual page 144

Field Setting from Outdoor Unit
Automatic lockout
When this setting is made, the auto-backup function will automatically be activated. This will allow the
auxiliary or secondary heat source to be automatically energized in the event of a system failure related
to outdoor units.
Error codes capable of auto-backup are listed in the table below. Please be aware that the error codes
that are not listed do not auto-backup in order to protect the unit.
Error code
(Auto backup
possible)
H3
H7
H9
LC
131
Error contents
A3 Drain level control system abnormality
E3 Actuation of high pressure switch
E4 Actuation of low pressure sensor
E5 Inverter compressor motor lock
E6 Compressor damage alarm
E7 Outdoor fan motor abnormality
E9 Electronic expansion valve coil abnormality
F3 Discharge pipe temperature abnormality
F4 Wet alarm
Harness abnormality (between outdoor unit main PCB and inverter PCB)
Outdoor fan PCB abnormality
Outdoor air thermistor (R1T) abnormality
J3 Discharge pipe thermistor (R21T) abnormality, Compressor body thermistor (R14T) abnormality
J5 Compressor suction thermistor (R12T) abnormality, Suction pipe thermistor (R10T) abnormality
Heat exchanger deicer thermistor (R11T) abnormality
J6
Heat exchanger gas pipe thermistor (R8T, R9T) abnormality
Receiver inlet thermistor (R3T) abnormality
J7 Subcooling heat exchanger liquid pipe thermistor (R7T) abnormality
Subcooling injection thermistor (R16T) abnormality
Heat exchanger liquid pipe thermistor (R4T, R5T) abnormality
J8
Leak detection thermistor (R15T) abnormality
Subcooling heat exchanger gas pipe thermistor (R6T) abnormality
J9
Receiver gas purge thermistor (R13T) abnormality
JA High pressure sensor abnormality
JC Low pressure sensor abnormality
L1 Inverter PCB abnormality
L2 Momentary power failure during test operation
L3 Reactor temperature rise abnormality
L4 Inverter radiation fin temperature rise abnormality
L5 Inverter compressor instantaneous overcurrent
L8 Inverter compressor overcurrent
L9 Inverter compressor startup abnormality
Transmission error between inverter PCB and outdoor unit main PCB
SiUS341802E
Field Settings and Test Operation