68
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
High pressure
protection of
system
D1
OFF 3s
and blink
once
o
¶
¶
¶
During cooling
and drying
operation,
except indoor
fan operates,
all loads stop
operation.
During heating
operation the
complete stops
Possible reasons:
1. Refrigerant was
superabundant;
2. Poor heat
exchange
(including filth
blockage of heat
exchanger and
bad radiating
environment);
Ambient
temperature is
too high.
Anti-freezing
protection
E2
OFF 3s
and blink
twice
n
o
n
o
During cooling
and drying
operation,
compressor and
outdoor fan stop
while indoor fan
operates
1. Poor air return
in indoor unit,
2. Fan speed is
abnormal, 3.
Evaporator is
dirty
High
discharge
temperature
protection of
compressor
D4
OFF 3s
and blink
4 times
n
o
n
¶
During cooling
and drying
operation,
compressor and
outdoor fan stop
while indoor
fan operates.
During heating
operation, all
loads stop
Please refer to
the malfunction
analysis
(discharge
protection
overload)
Overcurrent
protection
E5
OFF 3s
and blink
5 times
o
n
¶
o
During cooling
and drying
operation,
compressor and
outdoor fan stop
while indoor
fan operates.
During heating
operation, all
loads stop
1. Supply voltage
is unstable, 2.
Supply voltage
is too low and
load is too high,
3. Evaporator is
dirty
o
= OFF
n
= Illuminated
¶
= Blink
