75
Fault Displays
18,000 and 24,000 btuh units
Malfunction
Name
Indoor Unit Displaying Method
Outdoor Unit Display (LED)
A/C Status
Malfunctions
Dual-8
Code
Display
Indicator Display (during
blinking, ON 0.5s and OFF 0.5s
Indicator has 3 kinds of display
status and during blinking, ON 0.5s
and OFF 0.5s
Running
LED
Cooling
LED
Heating
LED
D40/
D5
D41/
D6
D42/
D16
D43/
D30
Decrease
frequency due to
high temperature
resistant
during heating
operation
H0
OFF
3s and
blink 10
times
n
o
¶
¶
All loads operate
normally, while
operation frequency
for compressor is
decreased
Refer to the
malfunction
analysis (overload,
high temperature
resistant)
Failure startup
LC
OFF
3s and
blink 11
times
o
¶
o
¶
During cooling and
drying operation,
compressor will stop
while indoor fan
will operate; During
heating operation,
the complete unit
will stop operation.
Refer to the
malfunction
analysis
Malfunction of
phase current
detection circuit
for compressor
U1
OFF
3s and
blink 13
times
o
¶
n
o
During cooling and
drying operation,
compressor will stop
while indoor fan
will operate; During
heating operation,
the complete unit
will stop operation.
Replace outdoor
control panel AP1
EEPROM
malfunction
EE
OFF
3s and
blink 15
times
o
o
o
n
During cooling and
drying operation,
compressor will stop
while indoor fan
will operate; During
heating operation,
the complete unit
will stop
Replace outdoor
control panel AP1
Charging
malfunction of
capacitor
PU
OFF
3s and
blink 17
times
o
n
o
n
During cooling and
drying operation,
compressor will stop
while indoor fan
will operate; During
heating operation,
the complete unit
will stop
Refer to the part
three--charging
malfunction
analysis of
capacitor
o
= OFF
n
= Illuminated
¶
= Blink
