40
Installation and Maintenance
Service Manual
NO.
Name of
malfunction
Indoor unit displaying method
Outdoor unit display(LEDs have 3
status)□OFF ■ON
☆
Blinks
AC status
Malfunctions
Double
8 code
display
Indicator display(LED blinks
0.5s-ON/0.5s-OFF)
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 fam motor is
runnig,others will stop to run.
heating;all stop running
High pressure of
system,might be:
1.Refrigerant is too much;
2.Poor heating exchanging
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,com
pressor,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.Evaporator is dirty;
3
Compressor
air exhaust
high temp.
protection
E4
3s off
blink four
times
■
□
■
☆
cooling,dehumidifying,com
pressor,outdoor fan motor
will stop running,indoor fan
motor works. heating:all stop
running.
Pls refer to rtouble
shoot (air exhaust
protection,overload)
4
AC overload
protection
E5
Off 3s
blink 5
times
□
■
☆
□
Cooling,dehumidifying,com
pressor,outdoor fan motor
will stop,indoor fan will work.
heating;all will stop
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
Off 3s
blink 6
times
□
□
□
☆
Cooling,compressor will
stop,indoor fan motor
works,Heating:all will stop
Please refer to
troubleshooting
6
Anti-high temp.
protection
E8
Off 3s
blink 8
times
■
□
■
■
Cooling,compressor will
stop,indoor fan motor
works,Heating:all will stop
Please refer to
troubleshooting
7
Indoor unit
motor no
feedback
H6
Off 3s
blink 11
times
Whole unit will stop to run
1.Poor insert for GPF
2.Indoor control board AP1
malfunction
3.Indoor motor M1
malfunction
8
Jump wire cap
malfunction
protection
C5
Off 3s
blink 15
times
Whole unit will stop to run
Indoor control board
AP1 jump cap poor
connected,please reinsert
or replace the jump cap.
9
Indoor ambient
sensor open
circuit,short
circuit
F1
Off 3s
blink
once
Cooling,dehumidifying:indoor
fan motor is runing,other
overloads will
stop;Heating,whole unit will
stop to run.
1.Room temp.sensor is not
connected with the control
panel AP1
2.Room temp.sensor is
damaged
10
Indoor
evaporator
sensor ciruit
open,short
circuit
F2
Off 3s
blink
twice
Cooling,dehumidifying;indoor
fan motor runing,other
overload will
stop;Heating,whole unit will
stop.
1,Tube temp.sensor is not
connected with the conrtol
panel AP1
2.Tube tmep.sensor is
damaged
11
Outdoor
ambient
sensor circuit
open,circuit
short
F3
Off 3s
blinks
three
times
□
□
☆
■
Cooling,dehumidifying;com
pressor will stop,indoor fan
motor will work.Heat:all will
stop
Outdoorroom temp.sensor
hasn’t connected well,or
damaged,please refer to
the sensor resistance value
for checking.
12
Outdoor
condemsor
sensor open
circuit,short
circuit
F4
Off 3s
blinks 4
times
□
□
☆
□
Cooling,dehumidifying;com
pressor will stop,indoor fan
motor will work.Heat:all will
stop
Outdoorroom temp.sensor
hasn’t connected well,or
damaged,please refer to
the sensor resistance value
for checking.
9.2 Flashing LED of Indoor/Outdoor Unit and Primary Judgement
