41
Troubleshooting
Error display Error display code malfunctio
n
Dual 8
display
LED
Repair method co
de
malfunction
Dual 8
display
LED
Repair method
1 Storage
slug
EE Heating LED-pause
3s and blink 15
times
Replace indoor main
board
15 Sync failure H7 Heating
LED-pause 3s and
blink 7 times
Check if the resistance
of compressor and
resistance to ground is
normal. If the
compressor is normal,
the outdoor main boar
d may be wrong.
2 Indoor
PCB
malfunctio
n
EE Heating LED-pause
3s and blink 15
times
Replace indoor main
board
16 Current diction
malfunction of
complete unit
U5 Cooling
LED-pause 3s and
blink 13 times
Replace outdoor main
board
3 Anti-freezi
ng
protection
E2 Running LED-
pause 3s and blink 2
times
Outdoor ambient
temperature is too low
17 Outdoor ambient
temperature sensor
malfunction
F3 Cooling
LED-pause 3s and
blink 3 times
Is it loose? Measure
the resistance value
with universal meter
4 Overload
of system
H4 Heating LED-pause
3s and blink 4 times
System is abnormal,
check if the evaporator
and condenser is dirty
and blocked
18 Discharge
protection of
compressor
E4 Running
LED-pause 3s and
blink 4 times
Is it loose? Measure
the resistance value
with universal meter
5 No motor
of indoor
unit
feedback
H6 Running LED-
pause 3s and blink
11 times
Is electromotor
mounted normally?
19 Break-circuit and
short-circuit of
outdoor discharge
temperature sensor
F5 cooling LED-
pause 3s and blink
5 times
Is it loose? Measure
the resistance value
with universal meter
6 Indoor
pipe
temperatur
e sensor
malfunctio
n
F2 cooling LED- pause
3s and blink 2 times
Is it loose? Measure
the resistance value
with universal meter
20 Break-circuit and
short-circuit of
outdoor condenser
temperature sensor
F4 cooling LED-
pause 3s and blink
18 times
Is it loose? Measure
the resistance value
with universal meter
7 Internal
ambient
temperatur
e sensor
malfunctio
n
F1 Cooling LED- pause
3s and blink 1 times
Is it loose? Measure
the resistance value
with universal meter
21 Overheat of carbon
fin
P8 heating LED-
pause 3s and blink
19 times
Is outdoor ambient
temperature is too
high? Is radiator
mounted correctly?
8 Zero
passage
abnormal
UF Heating and cooling
LED blinks 7 times
at the same time
Replace indoor main
board
22 DC overcurrent UU Heating and
cooling LED blink
11 times at the
same time
9 Overload
of
compresso
r
H3 heating LED- pause
3s and blink 3 times
Inspect connection
state of the overload
wire.
23 Temperature sensor
malfunction of
carbon fin
P7 heating LED-
pause 3s and blink
18 times
Replace outdoor main
board.
10 Startup
failure
Lc heating LED- pause
3s and blink 11
times
Check if the resistance
of compressor and
resistance to ground is
normal. If the
compressor is normal,
the outdoor main boar
d may be wrong.
24 Lack of Freon or
block protection
F0 cooling LED-
pause 3s and blink
10 times
11 No motor
of outdoor
unit
feedback
UH Heating and cooling
LED blink 8 times at
the same time
This malfunction may
happen when outdoor
DC electromotor is
used.
25 DC input voltage is
too high
PH cooling LED-
pause 3s and blink
11 times
Is voltage of AC power
supply normal?
12 Overcurren
t
protection
E5 Running LED-
pause 3s and blink 5
times
Is electric network
variable?
26 DC input voltage is
too low
PL Heating LED-
pause 3s and blink
21 times
Is voltage of AC power
supply normal?
13 4-way
valve
conversion
abnormal
U7 cooling LED- pause
3s and blink 20
times
Replace 4-way valve. 27 Communication
malfunction
E6 Running LED-
pause 3s and blink
6 times
Is outdoor connecting
wire reliably
connected?
14 Phase
current
detection
malfunctio
n of
compresso
r
U1 Heating LED- pause
3s and blink 13
times
Replace outdoor main
board.
28 Setting error,
indoor and outdoor
unit abnormal
UA Heating and
cooling LED blink
12 times at the
same time
Outdoor unit is not
matched with indoor
unit.
remarks 4min after protection stop of compressor, the malfunction is shown in error code. In other situation, the malfunction will be displayed by press the light button for 6 times within
4s.
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