LMAS Service Manual
Table Of Contents
- SERVICE MANUAL
- 1. GENERAL INFORMATION
- 2. TECHNICAL DATA AND PARTS LIST
- 3. TROUBLESHOOTING
- 1. Error code
- 1-1. How to check the error memory
- 1-2. How to erase the error memory
- 1-3. Error code table (Indoor unit and wired remote controller)
- 1-4. Error code table (Outdoor unit)
- 1-5. Error code table (Wireless LAN indicator)
- 1-6. Error code table (Mobile app)
- 1-7. Error message for wireless LAN control (Mobile app)
- 2. Troubleshooting with error code
- 2-1. E: 11.X. Serial communication error (Serial reverse transfer error) (Outdoor unit)
- 2-2. E: 11.X. Serial communication error (Serial forward transfer error) (Indoor unit)
- 2-3. E: 12.X. Wired remote controller communication error (Indoor unit)
- 2-4. E: 18.X. External communication error (Indoor unit)
- 2-5. E: 23.X. Combination error (Outdoor unit)
- 2-6. E: 26.X. Address setting error in wired remote controller (Indoor unit)
- 2-7. E: 29.X. Connected unit number error (Indoor unit)
- 2-8. E: 32.X. Indoor unit main PCB error (Indoor unit)
- 2-9. E: 35.X. MANUAL AUTO button error (Indoor unit)
- 2-10. E: 3A.X. Indoor unit communication circuit error (Indoor unit)
- 2-11. E: 41.X. Room temperature sensor error (Indoor unit)
- 2-12. E: 42.X. Indoor unit heat exchanger sensor error (Indoor unit)
- 2-13. E: 51.X. Indoor unit fan motor error (Indoor unit)
- 2-14. E: 58.X. Intake grille error (Indoor unit)
- 2-15. E: 62.X. Outdoor unit main PCB error (Outdoor unit)
- 2-16. E: 63.X. Inverter error (Outdoor unit)
- 2-17. E: 64.X. PFC circuit error (Outdoor unit)
- 2-18. E: 65.X. Trip terminal L error (Outdoor unit)
- 2-19. E: 71.X. Discharge thermistor error (Outdoor unit)
- 2-20. E: 73.X. Heat exchanger (Middle/Outlet) temperature thermistor error (Outdoor unit)
- 2-21. E: 74.X. Outdoor temperature thermistor error (Outdoor unit)
- 2-22. E: 77.X. Heat sink thermistor error (Outdoor unit)
- 2-23. E: 84.X. Current sensor error (Outdoor unit)
- 2-24. E: 86.X. High pressure switch error (Outdoor unit)
- 2-25. E: 86.X. Pressure sensor error (Outdoor unit)
- 2-26. E: 94.X. Trip detection (Outdoor unit)
- 2-27. E: 95.X. Compressor motor control error (Outdoor unit)
- 2-28. E: 97.X. Outdoor unit fan motor error (Outdoor unit)
- 2-29. E: 99.X. 4-way valve error (Outdoor unit)
- 2-30. E: A1.X. Discharge temperature error (Outdoor unit)
- 2-31. E: A5.X. Low pressure error (Outdoor unit)
- 2-32. E: AC.X. Heat sink temperature error (Outdoor unit)
- 3. Troubleshooting without error code
- 4. Troubleshooting with error code (For wireless LAN adapter)
- 4-1. E: 18.X. External communication error between indoor unit and WLAN adapter
- 4-2. Wireless LAN adapter error
- 4-3. Network communication error between wireless LAN router and WLAN adapter
- 4-4. E: 18.X. Communication error
- 4-5. E: 18.X. Wireless LAN adapter non-energized
- 4-6. Wireless LAN adapter Sleep mode (Indoor unit)
- 4-7. Mobile app setting method
- 5. Service parts information
- 6. Thermistor resistance values
- 1. Error code
- 4. CONTROL AND FUNCTIONS
- 1. Rotation number control of compressor
- 2. Auto changeover operation
- 3. Fan control
- 4. Louver control
- 5. Timer operation control
- 6. Defrost operation control
- 7. Various control
- 7-1. Auto restart
- 7-2. MANUAL AUTO operation
- 7-3. Forced cooling operation
- 7-4. MIN. HEAT operation
- 7-5. ECONOMY operation
- 7-6. POWERFUL operation
- 7-7. Fresh air control
- 7-8. Compressor preheating
- 7-9. External electrical heater control
- 7-10. Electronic expansion valve control
- 7-11. Prevention to restart for 3 minutes (3 minutes st)
- 7-12. 4-way valve control
- 7-13. Peak cut operation
- 7-14. Unit status monitoring and the detected value indication
- 8. Various protections
- 5. FILED WORKING
- BACK COVER
7-2. Models: AOUH18LMAS1 and AOUH24LMAS1
INVERTER ASSEMBLY
18 model : EZ-02010HUE
24 model : EZ-02010HUE
INDOOR UNIT
POWER SOURCE
1P2W AC208-230V
60Hz
1
2
3
L
N
EMI FILTER (A)
GRFC-13
2 TURN
TERMINAL
UL1015 AWG20 GREEN
UL1015 AWG20 BLACK
UL1015 AWG20 WHITE
UL1015 AWG20 RED
UL1015 AWG12 BLACK
UL1015 AWG12 WHITE
EMI FILTER (C)
GRFC-13
2 TURN
EMI FILTER (B)
TRMH-25-15-12E
4 TURN
UL1015 AWG20
GREEN
W102
L-IN
W103
L-IN
P109
E
MAIN PCB
18 model : H18LJTA(U)-A01-00-SV
24 model : H24LJTA(U)-A01-00-SV
TRANSISTOR PCB
18, 24 models : K17PH-2001SUE-TR1-SV
UL1015 AWG12
GREEN
4-WAY
VALVE
ELECTTRONIC
EXPANTION VALVE.1
4WV
EEV.1
RED
BLUE
ORANGE
YELLOW
WHITE
5
4
3
2
1
BLACK
BLACK
3
1
P60
B2P3-VH-B
WHITE
12
11
10
9
8
7
6
5
4
3
2
1
12
11
10
9
8
7
6
5
4
3
2
1
P108
B3 ( 8.0 ) B-PSILE-1
Blue
P106
L-OUT
P107
N-OUT
P30
B05B-PLISK-1
WHITE
P710
B12B-PASK-1
WHITE
P350
B04B-XNISK-A-1
WHITE
THERMISTOR ( COMP. TEMP. )
THERMISTOR ( PIPE MID. TEMP. )
THERMISTOR ( OUTDOOR TEMP. )
THERMISTOR ( PIPE OUT TEMP. )
THERMISTOR ( DISCHARGE TEMP. )
MARKING COLOR GRAY
MARKING COLOR RED
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
MARKING COLOR BROWN
3
2
1
3
2
1
3
2
1
P10
B03B-PASK-1
WHITE
P1
B03B-PLIEK-1
BLUE
P15
B04B-PLIRK-1
RED
P5
B03B-PLISK-1
WHITE
3
2
1
4
3
2
1
P20
B03B-XASK-1-A
WHITE
DC5V-3
C
C
DC13V-4
P661
B04B-PASK-1
WHITE
P580
B02B-XAYK-1-A
YELLOW
PA580
B02B-XAMK-1-A
GREEN
P590
B02B-XAKK-1-A
BLACK
PA590
B02B-XAEK-1-A
BLUE
DC13V-3
3
5
1
DC5V-1
A A
A
4
3
2
1
EX. IN1
EX. IN2
EX. OUT1
EX. OUT2
EMI FILTER (E)
GRFC-7
3 TURN
EMI FILTER (F)
GRFC-8
2 TURN
EMI FILTER (D)
GRFC-8
1 TURN
UL1015 AWG14 BLACK
UL1015 AWG14 WHITE
UL1430 AWG24 WHITE
UL1430 AWG24 WHITE
UL1430 AWG24 WHITE
UL1430 AWG24 WHITE
UL1430 AWG24
WHITE
UL1430 AWG24 WHITE
UL1430 AWG24 WHITE
UL1430 AWG24 WHITE
UL1430 AWG24 WHITE
UL1430 AWG24
WHITE
5
4
3
2
1
4
3
2
1
2
1
2
1
2
1
2
1
W200
L-IN
W201
N-IN
W202
RERAY-OUT
W203
DB-IN
DC5V-1
DC5V-1
4
3
2
1
P351
B04B-XNISK-A-1
WHITE
P650
B5 (7-2.3) B-XASK-1-A
WHITE
DC5V-1
DC380V
DC15V-1
3
2
1
3
2
1
1
7
6
5
4
1
7
6
5
4
UL1430 AWG24
WHITE
UL1430 AWG24
WHITE
1
2
UL1430 AWG22
RED
UL1430 AWG22
BLACK
UL1430 AWG22
WHITE
UL1430 AWG22
YELLOW
UL1430 AWG22
BROWN
BLACK
BLACK
UL1430 AWG22
WHITE
UL1430 AWG22
WHITE
BLACK
WHITE
YELLOW
BROWN
RED
DC FAN MOTOR
FM
HP
SW1
PRESSURE SWITCH 1
HIGH PRESSURE
EMI FILTER (G)
ZCAT2132-1130
1 TURN
COMPRESSOR
COMP
P400 U
P401 V
P402 W
UL3271 AWG12
RED
UL3271 AWG12 WHITE
UL3271 AWG12 BLACK
HEATSINK-THERMISTOR
UL3271 AWG14
RED
FLASH
P600
B128-PASK-1
WHITE
DC13V-3DC13V-3
D
P660
B05B-PASK-1
WHITE
DC5V-3
C
5
4
3
2
1
DC13V-4
4
3
2
1
D
P662
B05B-PASK-1
WHITE
P663
B04B-PASK-1
WHITE
P700
B03B-XAKK-1-A
BLACK
P770
B03B-XNISK-A-1
WHITE
A
1
3
4
5
6
Pin No.
Terminal
code
Vm
GND
Vcc
Vsp
FG
Function of terminal
Revolution pulse output
Speed control voltage input
Control power voltage input
GND
Motor power voltage input
Lead wire
color
Red
Black
White
Yellow
Brown
2
7
P650 DC Fan Motor
U-V
V-W
U-W
1.160
(20 )
DC Resistance 1,970
(20 )
DC
EXPANSION VALVE COIL 1
1(Red) - 2(Blue)
1(Red) - 3(Orange)
1(Red) - 4(Yellow)
1(Red) - 5(White)
P30 Expansion Valve Coil
46.0
(20 )
Recommended Drive Condition
Unipolar Drive, 1-2 Phase Excitation.
Coil resistance
M
A WHITE
COM RED
A ORANGE
COM
RED
B
YELLOW
Connector
terminal No.
5
4
3
2
1
Lead wire
color
White
Yellow
Orange
Blue
Red
Phase
A
A
B
B
COM(+)
Off
OffOff
Off Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
On
On
On
On
OnOn On
On On On
On On
1 2 3 4 5 6 7 8
Excitation state
Excitation order (1-2 phase excitation )
Valve operation
B
BLUE
P30 ELECTTRONIC EXPANTION VALVE COIL
P10 Thermistor Characteristics.
Thermistor
Thermistor ( Compressor temp. )
168.60 k
0.36 V
Temperature
62.55 k
0.86 V
40.01 k
1.23 V
P1 Thermistor Characteristics.
Thermistor
Thermistor ( Pipe-mid. temp. )
16.05 k
1.14 V
Temperature
5.98 k
2.21 V
3.84 k
2.77 V
P15 Thermistor Characteristics.
Thermistor ( Discharge temp. )
168.60 k
62.55 k
40.01 k
0.36 V
0.86 V 1.23 V
Thermistor ( Pipe-out temp. )
16.05 k
5.98 k
3.84 k
1.14 V
2.21 V 2.77 V
Thermistor
Temperature
P5 Thermistor Characteristics.
Thermistor
Thermistor ( Outdoor temp. )
35.21 k
2.61 V
Temperature
12.64 k
3.76 V
7.97 k
4.14 V
Type of contact
Characteristics of pressure switch
C
H
Pressure
Contact : Short Open
Contact : Open Short
4.2 ~ 4.05MPa
3.2 ± 0.15MPa
P770 HIGH PRESSURE SWITCH
P700
Thermistor Characteristics.
Thermistor ( Heatsink temp. )
15.83 k
5.90 k
3.78 k
0.43 V
1.01 V 1.42 V
Thermistor
Temperature
32℉ 68℉ 86℉
32℉ 68℉ 86℉
32℉ 68℉ 86℉
32℉ 68℉ 86℉
32℉ 68℉ 86℉
7-2. Models: AOUH18LMAS1 and AOUH24LMAS1 - (02-21) - 7. PC board diagrams
TECHNICAL DATA
AND PARTS LIST
TECHNICAL DATA
AND PARTS LIST