17
ErrorCode Abnormalpoint and detection method Cause Countermeasure
P6
Freezing/overheatingprotection is
operating
Freezingprotection (Cooling mode)
Theunit is in 6-minute resume prevention
modeif pipe <liquid or condenser/evapo-
rator>temperature stays under
thecompressor started. Abnormal if it
againwithin 16 minutes after 6-minute
resumeprevention mode.
Overheatingprotection (Heating mode)
Theunits is in 6-minute resume
preventionmode ifpipe <liquid or
condenser/evaporator> temperature is
temperature of over 70°C[158°F] is
detectedagain within 10minutes after
6minute resume preventionmode.
P8
Slighttemperature difference
betweenindoor room
temperatureand pipe <liquid
orcondenser/evaporator>
temperaturethermistor
•Shortage of refrigerant
•Disconnected holder of pipe
<liquidor condenser/
evaporator>thermistor
•Defective refrigerant circuit
Converseconnection of
extensionpipe (on plural units
connection)
Conversewiring of indoor/
outdoorunit connecting wire
(onplural units connection)
Defectivedetection of indoor
roomtemperature and pipe
<condenser/evaporator>
temperaturethermistor
Stopvalve is not opened
completely.
(Coolingor drying mode)
Cloggedfilter (reduced airflow)
Shortcycle of air path
Lowload (low temperature)
operationout of the tolerance
range
Defectiveindoor fan motor
•Fan motor is defective.
•Indoor controller board is defec-
tive.
Defectiveoutdoor fan control
Overchargeof refrigerant
Defectiverefrigerant circuit
(clogs)
(Heatingmode)
Cloggedfilter (reduced airflow)
Shortcycle of air path
Overload(high temperature)
operationout of the tolerance
range
Defectiveindoor fan motor
•Fan motor is defective.
•Indoor controller board is defec-
tive.
Defectiveoutdoor fan control
Overchargeof refrigerant
Defectiverefrigerant circuit
(clogs)
Bypasscircuit of outdoor unit
isdefective.
(Coolingor drying mode)
Checkclogs of the filter.
Removeblockage.
Referto 9-6.
Checkoutdoor fan motor.
Checkoperating condition of refrigerant
circuit.
(Heatingmode)
Checkclogs of the filter.
Removeblockage.
Referto 9-6.
Checkoutdoor fan motor.
~Checkoperating condition of refrigerant
circuit.
Pipetemperature
<Coolingmode>
Detectedas abnormal when the pipe tem-
peratureis not in the cooling range 3 min-
utesafter compressor start and 6 minutes
afterthe liquidor condenser/evaporatorpipe
isout of cooling range.
Note 1) It takes at least 9 minutes to detect.
Note2) Abnormality P8 is not detected in
dryingmode.
Coolingrange : - (TH-TH1)
TH:Lower temperature between liquid pipe
temperature (TH2) and condenser/
evaporatortemperature (T H5)
TH1:Intake temperature
<Heatingmode>
When10 seconds have passed after the
compressorstarts operation and the hot
adjustmentmode has finished, the unit is
detectedas abnormal when condenser/
evaporatorpipe temperature is not in heat-
ingrange within 20 minutes.
Note3) It takes at least 27 minutes to
detectabnormality.
Note4) It excludes the period of defrosting
(Detectionrestarts when defrosting
modeis over)
Heatingrange : (TH5-TH1)
(~ Checkpipe <liquid or condenser/evap-
orator>temperature with room tempera-
turedisplay on remote controller and
outdoorcontroller circuit board.
Pipe<liquid or condenser/evaporator>
temperaturedisplay is indicated by set-
tingSW2 of outdoor controller circuit
boardas follows.
Checkconverse connection of extension
pipeor converse wiring of indoor/outdoor
unitconnecting wire.
Conducttemperature check with outdoor
controllercircuit board after connecting
‘A-ControlService Tool(PAC-SK52ST)’.
)detectedas over 70°C[158°F] after the
compressor started. Abnormalif the