Sanyo Wall Mounted Air conditioner error codes

The error code you may find on the indoor unit of your Sanyo air conditioner in case of a malfunction is a useful hint that may enable you to fix the appliance straight away without anyone’s help. The table below explains what part is at fault and gives lists of possible problems. Note that the advice was developed specially for wall-mounted air conditioners made by Sanyo.
A = OFF B = Blinking C = ON (Illuminated)

Indication on indoor unit

CodeDiagnotice itemDiagnotics contents
S01Room temperature sensor failure(1) Sensor open circuit or short circuit
(2) Contact failure at connector or open circuit at terminal crimping location
(short-circuit detection only for the humidity sensor)
(3) Indoor/outdoor circuit board failure
S02Indoor heat exchanger sensor failure
S03Humidity sensor failure
S04Compressor temperature sensor failureDiagnotics contents
(1) Sensor open circuit or short circuit
(2) Contact failure at connector or open circuit at terminal crimping location
(3) Outdoor circuit board failure
S05Outdoor heat exchanger sensor failure
S06Outdoor air temperature sensor failure
S07Outdoor electrical current detection failureOutdoor circuit board failure
E01Indoor/outdoor communications failure (serial communications)(1) Mis-wiring (2) AC power failure (3) Blown fuse (4) Power relay failure
(5) Indoor or outdoor circuit board failure
E02• HIC circuit failure • Power Tr (transistor) circuit failure(1) HIC or power Tr failure (2) Outdoor fan does not turn. (3) Instantaneous power outage
(4) Service valve not opened. (5) Outdoor fan blocked. (6) Continuous overload operation
(7) Compressor failure (8) Outdoor circuit board failure
E03Outdoor unit external ROM (OTP data) failure(1) External ROM data failure (2) Outdoor circuit board failure
E04Peak current cut-off(1) Instantaneous power outage (2) HIC or power transistor failure
(3) Outdoor circuit board failure
E05PAM circuit failure .Active circuit failure(1) Outdoor circuit board failure (2) Outdoor power supply voltage failure
E06Compressor discharge overheat prevention activated(1) Electric expansion valve failure (2) Capillaries choked (3) Shortage of refrigerant
(4) Continuous overload operation (5) Outdoor fan does not rotate (6) Outdoor circuit board failure
E07Indoor fan operating failure(1) Fan motor failure (2) Contact failure at connector (3) Indoor circuit board failure
E084-way valve switching failure -Indoor zero-cross failure(1) 4-way valve failure (heat pump model only)
(2) Outdoor circuit board failure
E09No-refrigerant protection(1) Service valve not opened. (2) Shortage of refrigerant
E10DC compressor drive circuit failure(1) Open phase (2) Outdoor circuit board failure
E11Outdoor fan operating failure(1) Fan motor failure (2) Contact failure at connector (3) Outdoor circuit board failure
E12Outdoor system communications failure.
Outdoor high-pressure SW.
OLR operation.
Outdoor power supply open phase.
Outdoor coil freezing.
(1) Mis-wiring (2) Blown fuse (3) Power relay failure (4) Open phase
(5) Outdoor circuit board failure (6) Compressor failure
E13Freeze-prevention operation activated(1) Indoor fan system failure (2) Shortage of refrigerant (3) Low-temperature operation