Service Manual
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MODE
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FAN
CLOCK
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50
18K
Noice/dB(A)
12K
40
09K
30
20
10
0
Low
Middle
High
Indoor Fan Motor Rotating Speed
4
Super High
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outdoor
indoor
filter
A heat exchanger
A3
A1
filter
B heat exchanger
fan
A2
outdoor heat exchanger
4-way valve
B3
B1
SP
filter
B2
high pressure switch
Note: Not available for 14K/18K
model
discharge silencer
C heat exchanger
C3
C1
filter
D3
C2
D1
filter
gas -liquid separator
D2
Note: Not available for 14K/18K model
A1:A－unit electronic expansion valve B1:B-unit electronic expansion valve
C1:C-unit electronic expansion valve D1:D-unit electronic expansion valve
A2:A-unit gas pipe temperature sensor B2:B-unit gas pipe temperature sensor
C2:C-unit gas pipe temperature sensor D2:D-unit gas pipe temperature sensor
A3:A－unit liquid pipe temperature sensor B3:B-unit liquid pipe temperature sensor
C3:C-unit liquid pipe temperature sensor D3:D-unit liquid pipe temperature sensor
6
inverter compressor
D heat exchanger
discharge temperature
sensor
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1
ON/OFF
Press it to start or stop operation.
2
MODE
Press it to select operation mode (AUTO/COOL/DRY/FAN/HEAT).
3
+
Press it to increase temperature setting.
4
Press it to decrease temperature setting.
5
2
1
FAN
Press it to set fan speed.
6
3
4
6
5
11
12
13
TIMER ON
Press it to set auto-on timer.
7
9
10
Press it to set swing angle.
7
8
TIMER OFF
Press it to set auto-off timer.
8
9
14
CLOCK
Press it to set clock.
10
X-FAN (X-FAN is the alternative expression of BLOW for the
purpose of understanding.)
11
12
13
14
TEMP
TURBO
SLEEP
LIGHT
Press it to turn on/off the light.
25
24
23
22
21
15
16
20
17 18 19
15
MODE icon:
If MODE button is pressed, current operation mode icon
(AUTO),
( COOL),
(DRY),
(FAN) or
(HEAT is only for heat
pump models) will show.
16
SLEEP icon :
17
TEMP icon:
is displayed by pressing the SLEEP button. Press this button again to clear the display.
Pressing TEMP button,
(set temperature),
(indoor ambient temperature),
(outdoor ambient temperature) and blank is
displayed circularly.
18
Up & down swing icon:
is displayed when pressing the up & down swing button. Press this button again to clear the display.
10
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19
LIGHT icon:
20
LOCK icon:
is displayed by pressing the LIGHT button.Press LIGHT button again to clear the display.
is displayed by pressing "+" and “-” buttons simultaneously.Press them again to clear the display.
21
SET TIME display:
After pressing TIMER button, ON or OFF will blink.This area will show the set time.
22
TURBO icon:
is displayed when pressing theTURBO button.Press this button again to clear the display.
23
DIGITAL display:
This area will show the set temperature. In SAVE mode,"SE" will be displayed. During defrosting operation, “H1” will be displayed.
24
X-FAN icon:
25
FAN SPEED display:
is displayed when pressing the X-FAN button. Press this button again to clear the display.
Press FAN button to select the desired fan speed setting(AUTO Low-Med-High).Your selection will be displayed in the LCD windows,
except the AUTO fan speed.
Remote Controller Description
1
ON/OFF:
Press this button to turn on the unit. Press this button again to turn off the unit.
2
MODE:
Each time you press this button,a mode is selected in a sequence that goes from AUTO, COOL,DRY, FAN, and HEAT *, as the
following:
AUTO COOL
DRY FAN
HEAT*
*Note: Only for models with heating function.
After energization, AUTO mode is defaulted. In AUTO mode, the set temperature will not be displayed on the LCD, and the unit will
automatically select the suitable operation mode in accordance with the room temperature to make indoor room comfortable.
3
+:
Press this button to increase set temperature. Hold it down for above 2 seconds to rapidly increase set temperature. In AUTO mode,
set temperature is not adjustable.
4
-:
Press this button to decrease set temperature. Hold it down for above . 2 seconds to rapidly decrease set temperature. In AUTO
mode, set temperature is not adjustable.
5
FAN :
This button is used for setting fan speed in the sequence that goes from AUTO,
,
,
to then back to Auto.
AUTO
Low speed
Medium speed
High speed
6
Press this button to set up & down swing angle, which circularly changes as below:
OFF
This remote controller is universal. If any command
,
or
indicates the guide louver swings as:
11
is sent out, the unit will carry out the command as
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7
TIMER ON:
Press this button to initiate the auto-ON timer. To cancel the auto-timer program, simply press this button again. After pressing this
button,
disappears and "ON" blinks . 0 0:00 is displayed for ON time setting. Within 5 seconds, press + or - button to adjust the
time value. Every press of either button changes the time setting by 1 minute. Holding down either button rapidly changes the time
setting by 1 minute and then 10 minutes. Within 5 seconds after setting, press TIMER ON button to confirm.
8
TIMER OFF:
Press this button to initiate the auto-off timer. To cancel the auto-timer program, simply press the button again.TIMER OFF setting is
the same as TIMER ON.
9
CLOCK :
Pressing CLOCK button,
blinks. Within 5 seconds, pressing + or - button adjusts the present time. Holding down either button
above 2 seconds increases or decreases the time by 1 minute every 0.5 second and then by 10 minutes every 0.5 second. During
blinking after setting, press CLOCK button again to confirm the setting, and then
10
will be constantly displayed.
X-FAN:
Pressing X -FAN button in COOL or DRY mode,the icon
is displayed and the indoor fan will continue operation for 10 minutes in
order to dry the indoor unit even though you have turned off the unit.
After energization, X-FAN OFF is defaulted. X-FAN is not available in AUTO, FAN or HEAT mode.
11
TEMP:
Press this button, could select displaying the indoor setting temperature or indoor ambient temperature.When the indoor unit firstly
power on it will display the setting temperature, if the temperature's displaying status is changed from other status to"
",displays
the ambient temperature, 5s later or within 5s, it receives other remote control signal that will return to display the setting temperature. if the users haven't set up the temperature displaying status,that will display the setting temperature.
12
TURBO:
Press this button to activate / deactivate the Turbo function which enables the unit to reach the preset temperature in the shortest
time. In COOL mode, the unit will blow strong cooling air at super high fan speed. In HEAT mode, the unit will blow strong heating air
at super high fan speed.
13
SLEEP:
Press this button to go into the SLEEP operation mode. Press it again to cancel this function. This function is available in COOL,
HEAT (Only for models with heating function) or DRY mode to maintain the most comfortable temperature for you.
14
LIGHT:
Press LIGHT button to turn on the display's light and press this button again to turn off the display's light. If the light is turned on ,
is displayed. If the light is tunrned off,
disappears.
15 Combination of "+" and "-" buttons: About lock
Press "+ " and "-" buttons simultaneously to lock or unlock the keypad. If the remote controller is locked,
case, pressing any button,
is displayed. In this
blinks three times.
16 Combination of "MODE" and "-" buttons:About switch between Fahrenheit and Centigrade At unit OFF, press "MODE" and "- "
buttons simultaneously to switch between ℃ and ℉.
Replacement of Batteries
1.Remove the battery cover plate from the rear of the remote controller.
(As shown in the figure)
2.Take out the old batteries.
3.Insert two new AAA1.5V dry batteries, and pay attention to the polarity.
4. Reinstall the battery cover plate.
★Notes:
●When replacing the batteries, do not use old or different types of batteries.
Otherwise, it may cause malfunction.
●If the remote controller will not be used for a long time,
please remove batteries to prevent batteries from leaking.
●The operation should be performed in its receiving range.
●It should be kept 1m away from the TV set or stereo sound sets.
●If the remote controller does not operate normally, please take the
batteries out and reinsert them after 30 seconds. If it still can't operate
properly, replace the batteries.
12
Sketch map for
replacing batteries
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drain hose
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electric wire
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Water drainage pipe
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Star
Is the wiring
terminal between temperature
sensor and the controller loosened or
poo rly contacted?
yes
Insert the temperature
sensor tightly
no
no
Malfunction is
eliminated.
yes
Is there short circuit due to tripover
of the pa rts?
Make the parts upright
no
no
Malfunction is
eliminated.
Is the temperature
sensor normal according to the
Resistance Table?
yes
no
yes
Replace it with a
temperature sensor
of the same model
yes
no
Malfunction is
removed.
Replace the controller with
one of the same model
yes
End
27
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C5 is displayed
on the unit.
Is there jumper cap on the
controller?
Yes
Install a matching
jumper cap.
Is the
malfunction
eliminated?
No
Yes
Is the jumper cap inserted
incorrectly or improperly?
No
No
No
Re-insert the jumper
cap
Is the
malfunction
eliminated?
Yes
Replace the jumper
cap
Is the
malfunction
eliminated?
Yes
Yes
No
The mainboard is
defined abnormal
replace it
End
28
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“H6”is
displayed on
the unit.
Stir the fan blade
with a hand when
the unit is DE ENERGIZED.
Does the
blade rotate
unsmoothly?
No
Yes
Yes
Insert the feedback
terminal tightly .
Is the
malfunction
eliminated?
No
Yes
Is the
control terminal
of PG motor
loose?
No
Is the
malfunction
eliminated?
No
Is the
feedback
terminal of PG
motor loose?
No
Reinstall the motor
and the blade to
make it rotate
smoothly.
Insert the control
terminal tightly.
Yes
Is the
malfunction
eliminated?
No
Re-energize
to turn on the unit;
measure within 1 min after the
louvers are opened whether the output
voltage on the control terminal
of the PG motor is over 50V?
No
Yes
No
Mainboard
malfunction;
Replace it.
Yes
Yes
Replace the fan
motor
Is the
malfunction
eliminated?
Yes
End
29
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“U8” is
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Re-energize 1
minute after
de-erergization
Is“U8”
still displayed?
No
Yes
The zero-cross detection
circuit of the mainboard is
defined abnormal. Replace
the mainboard.
M alfunction is
eliminated.
30
The unit returns to normal.
Conclusion: U8 is displayed due to
instant energization after deenergization while the capacitor
discharges slowly.
7URXEOHVKRRWLQJ
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Main checking points:
ƽ If the connection wire between the indoor unit and outdoor unit is connected well, if the wires inside the unit is connected well;
ƽIf the indoor mainboard or outdoor main board is broken;
Flow chart:
Communication malfunction of some
indoor units
De-energize, check the connection
wire of indoor and outdoor unit and
the wire of the eletric box is
connected correctly
Connected correctly
no
Reconnect according to
the wiring diagram
yes
Eliminate the malfunction
no
yes
De-energize, change the communication wire of the wellcommunicated indoor unit and malfunction indoor unit,
then energize the unit and wait for 3min
The malfunction indoor unit
resumes normal
yes
Replace outdoor
mainboard
no
Replace the mainboard of the
malfunction indoor unit
End
31
7URXEOHVKRRWLQJ
All the indoor units appear
communication malfunction
De-energize, check the connection
wire of indoor and outdoor unit and
the wire of the eletric box is
connected correctly
no
Reconnect according to
Connected correctly?
yes
Eliminate the malfunction
the wiring diagram
yes
De-energize, check if the connection wire between
the outdoor mainboard and the filter board
according to the wiring diagram
Reconnect according to
the wiring diagram
no
Connected correctly?
yes
Eliminate the malfunction
no
yes
yes
The connection wire is broken?
Replace the
connection wire
yes
Eliminate the malfunction
no
no
Check if there is power input
bewtween the netrual wire and live
wire of the outdoor mainboard
no
There is power input?
Replace the filter board of
the outdoor unit
no
yes
Replace the outdoor
mainboard
Resume communication?
yes
Eliminate the malfunction
no
Replace indoor
mainboard
yes
End
32
7URXEOHVKRRWLQJ
Appendix 1: Resistance Table of Ambient Temperature Sensor for Indoor and Outdoor Units(15K)
Temp.˄ć˅ Resistance˄kΩ˅ Temp.˄ć˅ Resistance˄kΩ˅ Temp.˄ć˅ Resistance˄kΩ˅ Temp.˄ć˅ Resistance˄kΩ˅
-19
138.1
20
18.75
59
3.848
98
1.071
-18
128.6
21
17.93
60
3.711
99
1.039
-17
121.6
22
17.14
61
3.579
100
1.009
-16
115
23
16.39
62
3.454
101
0.98
-15
108.7
24
15.68
63
3.333
102
0.952
-14
102.9
25
15
64
3.217
103
0.925
-13
97.4
26
14.36
65
3.105
104
0.898
-12
92.22
27
13.74
66
2.998
105
0.873
-11
87.35
28
13.16
67
2.896
106
0.848
-10
82.75
29
12.6
68
2.797
107
0.825
-9
78.43
30
12.07
69
2.702
108
0.802
-8
74.35
31
11.57
70
2.611
109
0.779
-7
70.5
32
11.09
71
2.523
110
0.758
-6
66.88
33
10.63
72
2.439
111
0.737
-5
63.46
34
10.2
73
2.358
112
0.717
-4
60.23
35
9.779
74
2.28
113
0.697
-3
57.18
36
9.382
75
2.206
114
0.678
-2
54.31
37
9.003
76
2.133
115
0.66
-1
51.59
38
8.642
77
2.064
116
0.642
0
49.02
39
8.297
78
1.997
117
0.625
1
46.6
40
7.967
79
1.933
118
0.608
2
44.31
41
7.653
80
1.871
119
0.592
3
42.14
42
7.352
81
1.811
120
0.577
4
40.09
43
7.065
82
1.754
121
0.561
5
38.15
44
6.791
83
1.699
122
0.547
6
36.32
45
6.529
84
1.645
123
0.532
7
34.58
46
6.278
85
1.594
124
0.519
8
32.94
47
6.038
86
1.544
125
0.505
9
31.38
48
5.809
87
1.497
126
0.492
10
29.9
49
5.589
88
1.451
127
0.48
11
28.51
50
5.379
89
1.408
128
0.467
12
27.18
51
5.197
90
1.363
129
0.456
13
25.92
52
4.986
91
1.322
130
0.444
14
24.73
53
4.802
92
1.282
131
0.433
15
23.6
54
4.625
93
1.244
132
0.422
16
22.53
55
4.456
94
1.207
133
0.412
17
21.51
56
4.294
95
1.171
134
0.401
18
20.54
57
4.139
96
1.136
135
0.391
19
19.63
58
3.99
97
1.103
136
0.382
33
7URXEOHVKRRWLQJ
Appendix 2: Resistance Table of Outdoor and Indoor Tube Temperature Sensors(20K)
Temp.˄ć˅ Resistance˄kΩ˅ Temp.˄ć˅ Resistance˄kΩ˅ Temp.˄ć˅ Resistance˄kΩ˅ Temp.˄ć˅ Resistance˄kΩ˅
-19
181.4
20
25.01
59
5.13
-18
171.4
-17
162.1
-16
-15
98
1.427
21
23.9
60
22
22.85
61
4.948
99
1.386
4.773
100
1.346
153.3
23
21.85
145
24
20.9
62
4.605
101
1.307
63
4.443
102
1.269
-14
137.2
25
-13
129.9
26
20
64
4.289
103
1.233
19.14
65
4.14
104
1.198
-12
123
27
-11
116.5
28
18.13
66
3.998
105
1.164
17.55
67
3.861
106
1.131
-10
110.3
29
16.8
68
3.729
107
1.099
-9
104.6
30
16.1
69
3.603
108
1.069
-8
99.13
31
15.43
70
3.481
109
1.039
-7
94
32
14.79
71
3.364
110
1.01
-6
89.17
33
14.18
72
3.252
111
0.983
-5
84.61
34
13.59
73
3.144
112
0.956
-4
80.31
35
13.04
74
3.04
113
0.93
-3
76.24
36
12.51
75
2.94
114
0.904
-2
72.41
37
12
76
2.844
115
0.88
-1
68.79
38
11.52
77
2.752
116
0.856
0
65.37
39
11.06
78
2.663
117
0.833
1
62.13
40
10.62
79
2.577
118
0.811
2
59.08
41
10.2
80
2.495
119
0.77
3
56.19
42
9.803
81
2.415
120
0.769
4
53.46
43
9.42
82
2.339
121
0.746
5
50.87
44
9.054
83
2.265
122
0.729
6
48.42
45
8.705
84
2.194
123
0.71
7
46.11
46
8.37
85
2.125
124
0.692
8
43.92
47
8.051
86
2.059
125
0.674
9
41.84
48
7.745
87
1.996
126
0.658
10
39.87
49
7.453
88
1.934
127
0.64
11
38.01
50
7.173
89
1.875
128
0.623
12
36.24
51
6.905
90
1.818
129
0.607
13
34.57
52
6.648
91
1.736
130
0.592
14
32.98
53
6.403
92
1.71
131
0.577
15
31.47
54
6.167
93
1.658
132
0.563
16
30.04
55
5.942
94
1.609
133
0.549
17
28.68
56
5.726
95
1.561
134
0.535
18
27.39
57
5.519
96
1.515
135
0.521
19
26.17
58
5.32
97
1.47
136
0.509
34
7URXEOHVKRRWLQJ
Appendix 3: Resistance Table of Outdoor Discharge Temperature Sensor(50K)
Temp.˄ć˅
Resistance
Temp.˄ć˅
Resistance˄kΩ˅ Temp.˄ć˅ Resistance˄kΩ˅ Temp.˄ć˅ Resistance˄kΩ˅
-29
˄kΩ˅
853.5
10
98
49
18.34
88
4.754
-28
799.8
11
93.42
50
17.65
89
4.609
-27
750
12
89.07
51
16.99
90
4.469
-26
703.8
13
84.95
52
16.36
91
4.334
-25
660.8
14
81.05
53
15.75
92
4.204
-24
620.8
15
77.35
54
15.17
93
4.079
-23
580.6
16
73.83
55
14.62
94
3.958
-22
548.9
17
70.5
56
14.09
95
3.841
-21
516.6
18
67.34
57
13.58
96
3.728
-20
486.5
19
64.33
58
13.09
97
3.619
-19
458.3
20
61.48
59
12.62
98
3.514
-18
432
21
58.77
60
12.17
99
3.413
-17
407.4
22
56.19
61
11.74
100
3.315
-16
384.5
23
53.74
62
11.32
101
3.22
-15
362.9
24
51.41
63
10.93
102
3.129
-14
342.8
25
49.19
64
10.54
103
3.04
-13
323.9
26
47.08
65
10.18
104
2.955
-12
306.2
27
45.07
66
9.827
105
2.872
-11
289.6
28
43.16
67
9.489
106
2.792
-10
274
29
41.34
68
9.165
107
2.715
-9
259.3
30
39.61
69
8.854
108
2.64
-8
245.6
31
37.96
70
8.555
109
2.568
-7
232.6
32
36.38
71
8.268
110
2.498
-6
220.5
33
34.88
72
7.991
111
2.431
-5
209
34
33.45
73
7.726
112
2.365
-4
198.3
35
32.09
74
7.47
113
2.302
-3
199.1
36
30.79
75
7.224
114
2.241
-2
178.5
37
29.54
76
6.998
115
2.182
-1
169.5
38
28.36
77
6.761
116
2.124
0
161
39
27.23
78
6.542
117
2.069
1
153
40
26.15
79
6.331
118
2.015
2
145.4
41
25.11
80
6.129
119
1.963
3
138.3
42
24.13
81
5.933
120
1.912
4
131.5
43
23.19
82
5.746
121
1.863
5
125.1
44
22.29
83
5.565
122
1.816
6
119.1
45
21.43
84
5.39
123
1.77
7
113.4
46
20.6
85
5.222
124
1.725
8
108
47
19.81
86
5.06
125
1.682
9
102.8
48
19.06
87
4.904
126
1.64
Note: The information above is for reference only.
35
5HPRYDO3URFHGXUH
5HPRYDO3URFHGXUH
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WXUQLQJRIIDOOSRZHUVXSSOLHVEHIRUHGLVDVVHPEO\
1RWHWDNHV$IURQWSDQHODVH[DPSOH
Steps
Procedure
1.Remove the filter
1
Open the panel.
panel
2
Loosen the clasp of the filter.
clasp
3
Push the filter inward and then raise
it to remove it.
filter
2.Remove horizontal louver
1
Remove axile bush of horizontal
louver.
axile bush
36
5HPRYDO3URFHGXUH
Steps
2
Procedure
Bend the horizontal louver slightly to
remove it.
horizontal louver
3.Remove front panel
1
Slide the rotor shaft out of the groove.
Remove the front panel.
rotor shaft
front panel
4.Remove electric box cover 2
1
Remove the screws fixing the electric box cover 2.
screw
37
5HPRYDO3URFHGXUH
Steps
Procedure
electric box cover
2
Remove the electric box cover2.
5.Remove front case
1
Open the screw cap on the front case.
Remove the screws fixing the front
case.
screws
clasps
2
Loosen the left, middle and right
clasps.
left
front
case
3
Remove the front case.
38
middle
right
5HPRYDO3URFHGXUH
Steps
Procedure
6.Remove vertical louver
1
Loosen the clasps connecting vertical
louver with bottom case.
clasps
2
Remove the vertical louver.
vertical louver
7.Remove electric box
Heat exchanger
thermistor
1
Disconnect the indoor pipe temperature sensor.
screw
2
Remove the screw of the electric box.
screws
3
Remove the screws at the joint of
ground wire and evaporator.
39
Ground Wire
5HPRYDO3URFHGXUH
Steps
4
Procedure
Remove the clasp connecting electric box cover and electric box. Remove electric box cover.
clasp
fan motor signal wire
5
Disconnect the connecting wire of the
motor.
6
Disconnect the connecting wire of the
step motor.
connector of
step motor
7
Remove the screw fixing the display.
Remove the display.
Screw
electric box
8
Remove the electric box.
40
5HPRYDO3URFHGXUH
Steps
Procedure
8.Remove press plate of connecting pipe
Pipe Clamp
Auxiliary Piping
screw
1
Remove the screw fixing the press
plate of the connecting pipe.
Pipe Clamp
2
Remove the press plate of the connecting pipe.
9.Remove the evaporator
1
Remove the 3 screws at the joint of
the evaporator and bottom case.
screws
Auxiliary Piping
2
Adjust the pipe of evaporator.
41
5HPRYDO3URFHGXUH
Steps
3
Procedure
Remove the evaporator.
Heat
Exchanger
10.Remove cross flow blade and motor
Step Motor
1
Remove the screws fixing the step
motor. Remove the step motor.
Motor Press Plate
2
Remove the screws fixing the press plate
of the motor. Remove the motor.
Cross Flow Fan
Fan Motor
3
Remove cross flow blade and motor.
42
5HPRYDO3URFHGXUH
Steps
4
Procedure
O-Gasket
sub-assy of
Bearing
Remove ring of bearing.
Ring of
Bearing
5
Remove the screws at the joint of
cross flow blade and motor. Remove
Cross Flow Fan
the motor.
Fan Motor
43
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© 2021