72
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
air discharge
F9
OFF 3s
and blink
9 times
n
n
o
o
All loads operate
normally, while
operating frequency
for compressor is
decreased
Overload or
temperature is too
high, refrigerant
is insufficient,
Malfunction of
electric expansion
valve (EEV)
Voltage for
DC bus-bar
is too high
PH
OFF 3s
and blink
11 times
o
n
o
¶
During cooling and
drying operation,
compressor will stop
while indoor fan
will operate; During
heating operating
the complete unit
will stop operation
1. Measure the
voltage of position
L and N on wiring
board (XT), if the
voltage is higher
than 265VAC,
turn on the unit
after the supply
voltage is increased
to the normal
range. 2. If the AC
input is normal
measure the voltage
of electrolytic
capacitor C on
control panel
(AP1), if its normal,
theres malfunction
for the circuit,
please replace the
control panel (AP1)
Malfunction
of complete
units current
detection
U5
OFF 3s
and blink
13 times
o
n
¶
n
During cooling and
drying operating,
the compressor will
stop while indoor
fan will operate;
During heating
operation the
complete unit will
stop operating
Theres circuit
malfunction on
outdoor units
control panel AP1,
please replace
the outdoor units
control panel AP1
o
= OFF
n
= Illuminated
¶
= Blink
