70
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
Malfunction
protection of
jumper cap
C5
OFF 3s
and blink
15 times
The complete
unit will stop
operation
Poor connection for
the jumper cap on
indoor units, control
panel AP1, please
reinsert or replace the
jumper cap
Indoor
ambient
temperature
sensor is
open/short
circuit
F1
OFF 3s
and blink
once
During cooling
and drying
operation,
indoor unit
operates while
other loads
will stop
during heating
operation, the
complete unit
will stop
1. Room temperature
sensor hasn’t been
connected well with
indoor units control
panel AP1 (refer to
the wiring diagram for
indoor unit), 2. Room
temperature sensor
is damaged (please
refer to the resistance
table of temperature
sensor)
Indoor
evaporator
temperature
sensor is
open/short
circuited
F2
OFF 3s
and blink
twice
During cooling
and drying
operation,
indoor unit
will operate
while other
loads will stop;
During heating
operation,
the complete
unit will stop
operation
1. Room temperature
sensor hasn't been
connected well with
indoor units control
panel AP1 (refer to
the wiring diagram for
indoor unit) 2. Room
temperature sensor
is damaged (please
refer to the resistance
table of temperature
sensor)
Outdoor
ambient
temperature
sensor is
open/short
circuited
F3
OFF 3s
and blink
3 times
o
o
¶
n
During cooling
and drying
operating,
compressor stops
while indoor
fan operates;
During heating
operation,
the complete
unit will stop
operation
Outdoor temperature
sensor hasn't been
connected well or
is damaged. Please
check it by referring
to the resistance table
for the temperature
sensor.
o
= OFF
n
= Illuminated
¶
= Blink
