AUX-DC inverter ARV outdoor unit individual series technical manual
126
3. Indoor unit error code explanation
Error
code
Error code definition
Recovery
or not
Problem possible reasons
A1
Indoor ambient temperature sensor
failure
Yes
Indoor PCB is broken
The fuse of indoor PCB is broken
temperature sensor broken , or exceed test limit
A2
Temperature sensor about middle
position of evaporator failure
Yes
Indoor PCB is broken
The fuse of indoor PCB is broken
temperature sensor broken , or exceed test limit
A3
Indoor coil pipe inlet temperature
sensor failure
Yes
Indoor PCB is broken
The fuse of indoor PCB is broken
temperature sensor broken , or exceed test limit
A4
Indoor coil pipe outlet temperature
sensor failure
Yes
Indoor PCB is broken
The fuse of indoor PCB is broken
temperature sensor is broken , or exceed test limit
A5
Indoor water pump failure
Yes
Water pump no power
Water pump switch short-circuit or unconnected
Water pump is broken
Drain pipe block or up lean
Indoor PCB is broken
A6
Failure of indoor PG fan
No
Indoor fan motor failure
Indoor fan blade is stuck
The connection between PCB and fan motor failure.
A7
Failure of swing motor
No
Step motor failure
The connection between PCB and step motor failure.
A8
Indoor unit ERRPROM module failure
No
Indoor unit PCB is broken
Errprom module is broken.
A9
Communication error between indoor
unit and outdoor unit
No
The communication wire is broken.
Some or all of the Indoor units are power off
Indoor PCB is broken
AA
Communication error between indoor
unit and wire controller.
No
The communication wire is broken.
Indoor unit is power off
Indoor PCB or the wired controller is broken
AE
Operation mode conflict
Yes
The default mode is heating priority, unit which needs to
run in cooling mode will stand by and show mode conflict
AH
Indoor unit address repeated
Yes
Two or more indoor units were set the same address.
AJ
Indoor unit total capacity exceeded
Yes
Capacity of indoor units is less than 50% or more than
130% of outdoor unit capacity.
AF
The EXV can
’t close normally
Yes
EXV is blocked or the coil is dropped from the valve.
Indoor unit temperature sensor is abnormal.
A0
The EXV can
’t open normally
No
EXV is blocked or the coil is dropped from the valve.
Summary of Contents for ANB66FVAMT
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