Troubleshooting by Error Codes SiUS281811EA
210 Part 6 Service Diagnosis
4.2 Error Codes - Sub Codes
If an error code like the one shown below is displayed when the navigation remote controller
(BRC1E series) is in use, make a detailed diagnosis.
4.2.1 Indoor Unit
Error code
Troubleshooting
Description of error Description of diagnosis
A0 - 01 External protection device abnormality Refer to page 217.
A6 - 01
Fan motor locked A locked fan motor current has been detected.
Turn the fan by hand to check for the connection of connectors.
A6 - 10
Fan overcurrent error A fan motor overcurrent has been detected.
Check for the connection of the connector between the fan
motor and the fan PCB. If the connection is normal, replace the
fan motor. If this still cannot solve the error, replace the fan
PCB.
A6 - 11
Fan position detection error An error in the detection of position of the fan motor. Check for
the connection of the connector between the fan motor and the
fan PCB. If the connection is normal, replace the fan motor. If
this still cannot solve the error, replace the fan PCB.
A6 - 20 Indoor fan motor status abnormality Refer to page 228.
A6 - 21 Low indoor airflow Refer to page 229.
A8 - 01 Power supply voltage error Check for the input voltage of the fan motor.
A9 - 01
Electronic expansion valve error There is an error in the electronic expansion valve coil or a
connector disconnected.
A9 - 02
Refrigerant leakage detection error Refrigerant leaks even if the electronic expansion valve is
closed.
Replace the electronic expansion valve.
AH - 03
Transmission error (between the self-cleaning
decoration panel and the indoor unit)
(when the self-cleaning decoration panel is
mounted)
Check for the connection of the harness connector between the
panel PCB and the indoor unit PCB.
AH - 04
Dust detection sensor error
(when the self-cleaning decoration panel is
mounted)
Check for the connections of the connector X12A on the panel
PCB and the connectors X18A and X19A on the sensor PCB.
AH - 05
Dust collection sign error
(when the self-cleaning decoration panel is
mounted)
Check for clogging with dust at the dust collection port as well
as in the brush unit, S-shaped pipe, and dust box. Furthermore,
check for any stains of the light receiving and emitting parts of
the infrared unit.
AH - 06
Air filter rotation error
(when the self-cleaning decoration panel is
mounted)
Check for anything getting in the way of rotating the filter (e.g.
the filter comes off or the drive gear is clogged with foreign
matter).
AH - 07
Damper rotation error
(when the self-cleaning decoration panel is
mounted)
The damper does not rotate normally. Check for any foreign
matter around the damper and for the operation of the gear and
limit switch.
AH - 08
Filter self-cleaning operation error
(when the self-cleaning decoration panel is
mounted)
The unit has not yet completed the filter self-cleaning operation
even after the lapse of specified period of time. Check for any
external noise, etc.
AH - 09
Filter self-cleaning operation start disabled error
(when the self-cleaning decoration panel is
mounted)
The unit has been put into a state in which the filter
self-cleaning operation is disabled. Check the unit for the
operating conditions.
AJ - 01 Capacity setting error There is an error in the capacity setting of the indoor unit PCB.
AJ - 02
Electronic expansion valve setting error There is a fault in the setting of the gear type electronic
expansion valve/direct acting type electronic expansion valve.
C1 - 01
Transmission abnormality between indoor unit
PCB and fan PCB
Check for the conditions of transmission between the indoor
unit PCB and the fan PCB.
C1 - 07 Blower motor communication error Refer to page 240.
C6 - 01
Defective combination of indoor unit PCB and the
fan PCB
A combination of indoor unit PCB and the fan PCB is defective.
Check whether the capacity setting adaptor is correct and the
type of the fan PCB is correct.
Blower motor HP mismatch Refer to page 243.
C6 - 02
Indoor blower does not have required
parameters to function
Refer to page 244.
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