6 Troubleshooting
Indoor unit
SMGB0135 rev.0 - 06/2020
70
6.2 Indoor unit
Alarms through PC-ARFTE
Alarm
code
Protection
code
Outdoor
unit LED301
Blinking
times
Category Type of abnormality Main cause
03 - Indoor
Transmission Alarm (Not
outdoor unit detected)
Loose, disconnected, broken or short-
circuited connector.
16 - Indoor
DHW tank thermistor
abnormally (THM
DHWT
)
Loose, disconnected, broken or short-
circuited connector.
71 - Indoor
Tank over-temperature limit
protection
Failure of control relay.
80 - Indoor
LCD controller transmission
error
No H-link communication for a continuous
period of 90 seconds between Indoor and
LCD User control by connection wiring
(breaking, wiring error, etc.).
102 P102 2 times Outdoor unit LCD controller has no power
Power supply problem or incorrect wiring.
Failure of compressor or PCB.
Pipe clogging, excessive refrigerant, innert
gas mixing, fan motor locking at cooling
operation.
103 P103 3 times Outdoor unit
Abnormal Low Speed of the
Compressor
Failure of compressor or PCB.
104 P104 4 times Outdoor unit
Compressor Changeover
Failure (Switching Failure)
Failure of compressor or PCB.
105 P105 5 times Outdoor unit
Lower Limit of Compressor
Overload
Failure of compressor or PCB.
-- P106 6 times Outdoor unit
Stoppage by OH Thermistor
High Temperature
Incorrect wiring, disconnected wiring,
broken cable, sensor failure.
Pipe clogging, excessive refrigerant, innert
gas mixing, fan motor locking at cooling
operation.
107 P107 7 times Outdoor unit
Thermistor Failure: Thermistor
disconnection short circuit
Incorrect wiring, disconnected wiring,
broken cable, sensor failure.
-- P109 9 times Outdoor unit
Stoppage by Transmission
Error, communication error
Incorrect or disconnected wiring.
PCB failure.
-- P110 10 times Outdoor unit Power Supply Voltage Error
Power supply problem or incorrect wiring.
Failure of compressor or PCB.
-- P111 11 times Outdoor unit Fan abnormality 1
Failure of fan motor.
Failure of PCB.
112 P112 12 times Outdoor unit Fan lock, Fan abnormality 2
Failure of fan motor.
Failure of PCB.
113 P113 13 times Outdoor unit EEPROM Error Failure of PCB.
114 P114 14 times Outdoor unit Overvoltage abnormality
Power supply problem or incorrect wiring.
Failure of compressor or PCB.
115 P115 15 times Outdoor unit Circuit abnormality Failure of PCB.
-- P116 16 times Outdoor unit Software Ip cut stop Failure of compressor or PCB.
204 - LCD
Indoor unit stops answering to
PC-ARFTE
Loose, disconnected, broken or short-
circuited connector.
205 - LCD
Central Alarm, no Central
message
Loose, disconnected, broken or short-
circuited connector.
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