Technical Information
ƳƳ
No
Name of
malfunction
Indoor unit display method
Outdoor uniot display (LED have
3 status)
OFF
ON
Blinks
AC Status
Malfunctions
Double
8 code
display
Indicator display (LED blinks
0.5s-ON/0.5s-OFF)
Only for the mode with this function
Running
LED
Cooling
LED
Heating
LED
D40/
D5
D41/
D6
D42/
D16
D43/
D30
1
System high
pressure
protection
E1
3s off
blink
once
Cooling, dehumidifying,
except the indoor fan
motor is running, others
will stop to run. Heating;
all stop running
High pressure of system
might be:
1. Refrigerant is too much
2. Poor heat exchaning
for units (Including heat
exchanger is dirty and unit
heating radiating ambient
is poor)
3. Ambient temp is too high
2
Anti-Freezing
protection
E2
3s off
blink
twice
Cooling, dehumidifying
compressor, outdoor fan
motor will stop running,
indoor fan motor will
keep running
1. Poor indoor unit air
returning
2. Indoor fan motor rotating
speed abnormal
3. Ambient temp. is too high
3
Computer air
exhaust high
temp protec-
tion
E4
3s off
blink
four
times
Cooling, dehumidifying
compressor, outdoor fan
motor will stop running,
indoor fan motorwill
keep running Heating;
all stop running
Please refer to trouble
shooting (air exhaust
protection, overload)
4
AC overload
protection
E5
3s off
blink five
times
Cooling, dehumidifying
compressor, outdoor fan
motor will stop, indoor
fan will work. Heating;
all will stop running
1. Power supply is stable,
fluctuation is too much
2. Power supply is too low,
overload is too much
5
Indoor and
outdoor units
communication
malfunction
E6
3s off
blink six
times
Cooling, compressor will
stop, indoor fan motor
works. Heating; all will
stop
Please refer to trouble
shooting
6
Anti-high temp
protection
E8
3s off
blink
eight
times
Cooling, compressor will
stop, indoor fan motor
works. Heating; all will
stop
Please refer to trouble
shooting
7
Indoor unit mo-
tor no feedback
H6
3s off
blink 11
times
Whole unit stop running 1. Poor insert for GPF
2. Indoor control board AP1
malfunction
3. Indoor motor M1
malfunction
8
Jump wire cap
malfunction
protection
C5
3s off
blink 15
times
Whole unit stop running Indoor control board AP1
jump cap poor connection.
Please insert or replace the
jump cap.
9
Indoor ambient
sensor open
circuit, short
circut
F1
3s off
blink
once
Cooling, dehumidify-
ing: indoor fan motor is
running, other overloads
will stop. Heating; whole
unit will stop running
1. Room temp. sensor is not
connected with the control
panel AP1
2. Room temp. sensor is
damaged.
10
Indoor evap-
orator sensor
circuit open,
short circuit
F2
3s off
blink
twice
Cooling, dehumidify-
ing: indoor fan motor is
running, other overloads
will stop. Heating; whole
unit will stop running
1. Tube temp. sensor is not
connected with the control
panel AP1
2. Room temp. sensor is
damaged.
11
Outdoor am-
bient sensor
circuit open,
short circuit
F3
3s off
blink
three
times
Cooling, dehumidifying;
comnpressor will stop,
indoor fan motor will
work. Heat: all will stop.
Outdoor room temp. sensor
hasn’t connected well, or
damaged. Please refer to the
sensor resistance value for
checking
12
Outdoor con-
densor sensor
open circuit,
short circuit
F4
3s off
blink
four
times
Cooling, dehumidifying;
comnpressor will stop,
indoor fan motor will
work. Heat: all will stop.
Outdoor room temp. sensor
hasn’t connected well, or
damaged. Please refer to the
sensor resistance value for
checking
13
Malfunction of
detecting plate
(WIFI)
JF