Gree GWC12KF-K3DNA5A

Troubleshooting
Error display Error display code malfunctio
n
Dual 8
disp
lay
LED
Repair method co
de
malfunction
Dua
l 8
disp
lay
LED
Repair method
1 Storage
slug
EE Heating LED-pause
3s and blink 15
times
Repla
ce indoor main
board
15 Sy
nc failure H7 Heating
LED-
pause 3s and
blink 7 t
imes
C
heck if the resistance
of com
pressor and
res
istance to ground is
norm
al. If the
com
pressor is normal,
the ou
tdoor main boar
d m
ay be wrong.
2 Indoor
PCB
malfunctio
n
EE Heati
ng LED-pause
3s and b
link 15
tim
es
Repla
ce indoor main
board
16 Curren
t diction
m
alfunction of
com
plete unit
U5
Cooling
LED-
pause 3s and
blink 13
times
Repla
ce outdoor main
board
3 Anti-freezi
ng
protection
E2 Running
LED-
pause 3
s and blink 2
tim
es
Outdoor am
bient
tem
perature is too low
17 Outdoor
ambient
tem
perature sensor
m
alfunction
F
3 Cooling
LED-
pause 3s and
blink 3 t
imes
I
s it loose? Measure
the r
esistance value
with un
iversal 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 Discha
rge
prot
ection of
com
pressor
E4 Running
LED-
pause 3s and
blink 4 t
imes
I
s it loose? Measure
the r
esistance value
with un
iversal meter
5 No motor
of indoor
unit
feedback
H6 Running
LED-
pause 3
s and blink
11
times
I
s electromotor
m
ounted normally?
19 B
reak-circuit and
shor
t-circuit of
outdoo
r discharge
tem
perature sensor
F5 cool
ing LED-
pause 3s a
nd blink
5 tim
es
I
s it loose? Measure
the r
esistance value
with un
iversal meter
6 Indoor
pipe
temperatur
e sensor
malfunctio
n
F2
cooling LED- pause
3s and b
link 2 times
I
s it loose? Measure
the r
esistance value
with un
iversal meter
20 B
reak-circuit and
shor
t-circuit of
outdoo
r condenser
tem
perature sensor
F4 cool
ing LED-
pause 3s a
nd blink
18 tim
es
Is it loose? Measure
the resistance value
with universal meter
7 Internal
ambient
temperatur
e sensor
malfunctio
n
F1
Cooling LED- pause
3s and b
link 1 times
I
s it loose? Measure
the r
esistance value
w
ith universal meter
21
Overheat of carbon
fin
P8 heat
ing LED-
pause 3s a
nd blink
19 tim
es
I
s outdoor ambient
tem
perature is too
hig
h? Is radiator
m
ounted correctly?
8 Zero
passage
abnormal
UF
Heating and cooling
LED bl
inks 7 times
at t
he same time
Repla
ce indoor main
board
22 D
C overcurrent UU Heating and
cool
ing LED blink
11
times at the
sam
e time
9 Overload
of
compresso
r
H3
heating LED- pause
3s and b
link 3 times
I
nspect connection
sta
te of the overload
wi
re.
23 T
emperature sensor
m
alfunction of
carbo
n fin
P7 heat
ing LED-
pause 3s a
nd blink
18 tim
es
Repla
ce outdoor main
board.
10 Startup
failure
Lc heating LED- pause
3s and blink 11
times
C
heck if the resistance
of com
pressor and
res
istance to ground is
norm
al. If the
c
ompressor is normal,
the ou
tdoor main boar
d m
ay be wrong.
24
Lack of Freon or
block
protection
F0 cool
ing LED-
pause 3s a
nd blink
10 tim
es
11 No motor
of outdoor
unit
feedback
UH
Heating and cooling
L
ED blink 8 times at
the s
ame time
Th
is malfunction may
h
appen when outdoor
DC ele
ctromotor is
used.
25
DC input voltage is
to
o high
PH cool
ing LED-
pause 3s a
nd blink
11
times
I
s voltage of AC power
supply
normal?
12 Overcurren
t
protection
E5 Running
LED-
pause 3
s and blink 5
tim
es
I
s electric network
v
ariable?
26
DC input voltage is
too l
ow
PL H
eating LED-
pause 3s a
nd blink
21 tim
es
I
s voltage of AC power
supply
normal?
13 4-way
valve
conversion
abnormal
U7
cooling LED- pause
3s and b
link 20
tim
es
Repla
ce 4-way valve. 27 Communication
m
alfunction
E6 Running
LED-
pause 3s a
nd blink
6 tim
es
I
s outdoor connecting
wi
re reliably
connec
ted?
14 Phase
current
detection
malfunctio
n of
compresso
r
U1
Heating LED- pause
3s and b
link 13
tim
es
Repla
ce outdoor main
board.
28 S
etting error,
indoo
r and outdoor
unit abno
rmal
UA Heating and
cooling LED blink
12 times at the
same time
Outdoor u
nit is not
m
atched 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.
54