Specifications
116
Error Code
Meaning of error code and detection method
Case Judgment and action
P6
Freezing/overheating protection is
working
1 Freezing protection
The unit is in six-minute resume preven-
tion mode if pipe <liquid or condenser-
evaporator> temperature stays under
-15: for three minutes, three minutes
after the compressor started. Abnormal
if it stays under -15: for three minutes
again within 16 minutes after six-minute
resume prevention mode.
2 Overheating protection
The units is in six-minute resume pre-
vention mode if pipe <condenser-evapo-
rator> temperature is detected as over
74: after the compressor started. The
temperature of over 74: is detected
again within 10 minutes after six-minute
resume prevention mode.
P8
1 Slight temperature difference
between indoor room tempera-
ture and pipe <liquid or con-
denser-evaporator> tempera-
ture thermistor
• Shortage of refrigerant
• Disconnected holder of pipe
<liquid or condenser-evapo-
rator> thermistor
• Defective refrigerant circuit
2 Converse connection of exten-
sion pipe (on plural units con-
nection)
3 Converse wiring of indoor/out-
door unit connecting wire (on
plural units connection)
4 Defective detection of indoor
room temperature and pipe
<condenser-evaporator> tem-
perature thermistor
5 Stop valve is not opened
completely.
14Check pipe <liquid or condenser-evapora-
tor> temperature with room temperature
display on remote controller and outdoor
controller board.
Pipe <liquid or condenser-evaporator> tem-
perature display is indicated by setting
SW2 of outdoor controller board as follows.
23Check converse connection of extension
pipe or converse wiring of indoor/outdoor
unit connecting wire.
5Check outdoor four way valve action
123
TH2 temperature display
Outdoor controller board
SW2 setting
Indoor unit No.1
456
123
Indoor unit No.2
456
123
Indoor unit No.3
456
123
Indoor unit No.4
456
123
TH5 temperature display
Indoor unit No.1
456
123
Indoor unit No.2
456
123
Indoor unit No.3
456
123
Indoor unit No.4
456
(Cooling or drying mode)
1 Clogged filter (reduced airflow)
2 Short cycle of air path
3 Low-load (low temperature)
operation beyond the toler-
ance range
4 Defective indoor fan motor
• Fan motor is defective.
• Indoor controller board is
defective.
5 Overchange of refrigerant
6 Defective refrigerant circuit
(clogs)
(Heating mode)
1 Clogged filter (reduced airflow)
2 Short cycle of air path
3 Over-load (high temperature)
operation beyond the toler-
ance range
4 Defective indoor fan motor
• Fan motor is defective.
• indoor controller board is
defective.
5 Overcharge of refrigerant
6 Defective refrigerant circuit
(clogs)
7 Bypass circuit of outdoor unit
is defective.
(Cooling or drying mode)
1 Check clogs of the filter.
2 Remove shields.
4 Measure the resistance of fan motor's winding.
Measure the output voltage of fan's connec-
tor (FAN) on indoor controller board.
WThe indoor controller board should be nor-
mal when a current of AC 220V to 240V is
detected while fan motor is connected.
Refer to page 128 to 130.
56Check operating condition of refrigerant
circuit.
(Heating mode)
1 Check clogs of the filter.
2 Remove shields.
4 Measure the resistance of fan motor's winding.
Measure the output voltage of fan's connec-
tor (FAN) on indoor controller board.
WThe indoor controller board should be
normal when a current of AC 220V to 240V
is detected while fan motor is connected.
Refer to page 128 to 130.
5~7Check operating condition of refrigerant
circuit.
Abnormality of pipe temperature
(Cooling mode)
Detected as abnomal when the pipe tem-
perature is not in the cooling range 3 min-
utes later of compressor start and 6 min-
utes later of the liquid or condenser/evapo-
rator pipe is out of cooling range.
Note 1) It takes at least 9 min. to detect.
Note 2) Abnormality P8 is not detected in
drying mode.
Cooling range : Indoor pipe temperature
(TH2 or TH5) – intake temperature
(TH1) [ -3 deg
TH: Lower temperature between: liquid
pipe temperature and condenser/
evaporator temperature
(Heating mode)
When 10 seconds have passed after the
compressor starts operation and the hot
adjustment mode has finished, the unit is
detected as abnormal when
condenser/evaporator pipe temperature is
not in heating range with in 20 minutes.
Note 3) It takes at least 27 minutes to
detect abnormality.
Note 4) It excludes the period of defrosting
(Detection restarts when defrost-
ing mode is over)
Heating operation = 5 deg [ (Condenser/
Evaporator temperature (TH5) –
intake temperature(TH1))
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