Midea MSE-09CRN1-BQ8W, MSE-09HRN1-BQ8W, MSE-12CRN1-BQ8W, MSE-12HRN1-BQ8W, MSE-12CRN1-MQ8W Service Manual
...Page 1
MSE-09CRN1-BQ8W; MSE-09HRN1-BQ8W
MSE-12CRN1-BQ8W; MSE-12HRN1-BQ8W
MSE-12CRN1-MQ8W; MSE-12HRN1-MQ8W
MSE-18CRN1-MQ8W; MSE-18HRN1-MQ8W
Page 2
Content
- 1 -
Content
1 Precaution.........................................................................................................................1
1.1 Safety Precaution...................................................................................................................................1
1.2 Warning..................................................................................................................................................1
2 Function............................................................................................................................4
3 Dimension.........................................................................................................................5
4 Specification.....................................................................................................................7
5 Refrigerant cycle diagram............................................................................................. 11
6 Operation limits..............................................................................................................12
7 Wiring diagram...............................................................................................................13
8 Installation details..........................................................................................................21
8.1 Wrench torque sheet for installation....................................................................................................21
8.2 Connecting the cables.........................................................................................................................21
8.3 Pipe length and the elevation..............................................................................................................21
8.4 Air purging of the piping and indoor unit..............................................................................................22
8.5 Pumping down (Re-installation)...........................................................................................................24
8.6 Re-air purging (Re-installation)............................................................................................................25
8.7 Balance refrigerant of the 2-way, 3-way valves...................................................................................26
8.8 Evacuation...........................................................................................................................................27
8.9 Gas charging........................................................................................................................................28
9 Electronic function.........................................................................................................29
9.1 Electronic control working environment...............................................................................................29
9.2 Proper symbols and their meaning......................................................................................................29
9.3 Function ...............................................................................................................................................30
9.4 Protection.............................................................................................................................................30
9.5 Fan only mode.....................................................................................................................................31
9.6 Cooling mode.......................................................................................................................................31
9.7 Dehumidifying mode............................................................................................................................32
9.8 Heating mode.......................................................................................................................................32
9.9 Defrosting mode(available for heating mode) .....................................................................................33
9.10 Auto mode..........................................................................................................................................34
9.11 Force cooling function........................................................................................................................34
9.12 Sleep mode(Economic mode)...........................................................................................................35
9.13 Auto restart function...........................................................................................................................36
9.14 Turbo mode........................................................................................................................................36
9.15 Ionizer (air clean) function.................................................................................................................36
9.16 Follow me function.............................................................................................................................36
10 Model and Parameters...................................................................................................38
11 Troubleshooting.............................................................................................................40
11.1 Display board.....................................................................................................................................40
11.2 Troubleshooting..................................................................................................................................41
11.3 Diagnostic chart..................................................................................................................................42
11.4 Resetting phenomenon often occurs during operation......................................................................44
Page 3
Content
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11.5 Indoor fan speed out of control .........................................................................................................44
11.6 Temperature sensor error...................................................................................................................45
11.7 Over current protection of the compressor occurs 4 times................................................................45
11.8 EEROM error......................................................................................................................................45
11.9 Outdoor unit protects..........................................................................................................................46
11.10 Indoor unit communication error......................................................................................................46
12 Characteristic of temperature sensor ..........................................................................47
Page 4
Service manual
- 1 -
1 Precaution
1.1 Safety Precaution
To prevent injury to the user or other people and property damage, the following instructions
must be followed.
Incorrect operation due to ignoring instruction will cause harm or damage.
Before service unit, be sure to read this service manual at first.
1.2 Warning
Installation
Do not use a defective or underrated circuit breaker. Use this appliance on a dedicated
circuit.
There is risk of fire or electric shock.
For electrical work, contact the dealer, seller, a qualified electrician, or an Authorized service
center.
Do not disassemble or repair the product, there is risk of fire or electric shock.
Always ground the product.
There is risk of fire or electric shock.
Install the panel and the cover of control box securely.
There is risk of fire of electric shock.
Always install a dedicated circuit and breaker.
Improper wiring or installation may cause fore or electric shock.
Use the correctly rated breaker of fuse.
There is risk of fire or electric shock.
Do not modify or extend the power cable.
There is risk of fire or electric shock.
Do not install, remove, or reinstall the unit by yourself (customer).
There is risk of fire, electric shock, explosion, or injury.
Be caution when unpacking and installing the product.
Sharp edges could cause injury, be especially careful of the case edges and the fins on the condenser and
evaporator.
For installation, always contact the dealer or an Authorized service center.
There is risk of fire, electric shock, explosion, or injury.
Do not install the product on a defective installation stand.
It may cause injury, accident, or damage to the product.
Be sure the installation area does not deteriorate with age.
If the base collapses, the air conditioner could fall with it, causing property damage, product failure, and personal
injury.
Do not let the air conditioner run for a long time when the humidity is very high and a door or
windows is left open.
Moisture may condense and wet or damage furniture.
Take care to ensure that power cable could not be pulled out or damaged during operation.
There is risk of fire or electric shock.
Page 5
Service manual
- 2 -
Do not place anything on the power cable.
There is risk of fire or electric shock.
Do not plug or unplug the power supply plug during operation.
There is risk of fire or electric shock.
Do not touch (operation) the product with wet hands.
There is risk of fire or electric shock.
Do not place a heater or other appliance near the power cable.
There is risk of fire and electric shock.
Do not allow water to run into electric parts.
It may cause fire, failure of the product, or electric shock.
Do not store or use flammable gas or combustible near the product.
There is risk of fire or failure of product.
Do not use the product in a tightly closed space for a long time.
Oxygen deficiency could occur.
When flammable gas leaks, turn off the gas and open a window for ventilation before turn the
product on.
Do not use the telephone or turn switches on or off.
There is risk of explosion or fire.
If strange sounds, or small or smoke comes from product. Turn the breaker off or disconnect
the power
supply
cable.
There is risk of electric shock or fire.
Stop operation and close the window in storm or hurricane. If possible, remove the product
from the window before the hurricane arrives.
There is risk of property damage, failure of product, or electric shock.
Do not open the inlet grill of the product during operation. (Do not touch the electrostatic
filter, if the unit is so equipped.
There is risk of physical injury, electric shock, or product failure.
When the product is soaked (flooded or submerged), contact an Authorized service center.
There is risk of fire or electric shock.
Be caution that water could not enter the product.
There is risk of fire, electric shock, or product damage.
Ventilate the product from time to time when operating it together with a stove, etc.
There is risk of fire or electric shock.
Turn the main power off when cleaning or maintaining the product.
There is risk of electric shock.
When the product is not be used for a long time, disconnect the power supply plug or turn off
the breaker.
There is risk of product damage or failure, or unintended operation.
Take care to ensure that nobody could step on or fall onto the outdoor unit.
This could result in personal injury and product damage.
CAUTION
Always check for gas (refrigerant) leakage after installation or repair of product.
Low refrigerant levels may cause failure of product.
Install the drain hose to ensure that water is drained away properly.
A bad connection may cause water leakage.
Keep level even when installing the product.
To avoid vibration of water leakage.
Do not install the product where the noise or hot air from the outdoor unit could damage the
neighborhoods.
It may cause a problem for your neighbors.
Page 6
Service manual
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Use two or more people to lift and transport the product.
Avoid personal injury.
Do not install the product where it will be exposed to sea wind (salt spray) directly.
It may cause corrosion on the product. Corrosion, particularly on the condenser and evaporator fins, could cause
product malfunction or inefficient operation.
Operational
Do not expose the skin directly to cool air for long periods of time. (Do not sit in the draft).
This could harm to your health.
Do not use the product for special purposes, such as preserving foods, works of art, etc. It is
a consumer air conditioner, not a precision refrigerant system.
There is risk of damage or loss of property.
Do not block the inlet or outlet of air flow.
It may cause product failure.
Use a soft cloth to clean. Do not use harsh detergents, solvents, etc.
There is risk of fire, electric shock, or damage to the plastic parts of the product.
Do not touch the metal parts of the product when removing the air filter. They are very sharp.
There is risk of personal injury.
Do not step on pr put anything on the product. (outdoor units)
There is risk of personal injury and failure of product.
Always insert the filter securely. Clean the filter every two weeks or more often if necessary.
A dirty filter reduces the efficiency of the air conditioner and could cause product malfunction or damage.
Do not insert hands or other object through air inlet or outlet while the product is operated.
There are sharp and moving parts that could cause personal injury.
Do not drink the water drained from the product.
It is not sanitary could cause serious health issues.
Use a firm stool or ladder when cleaning or maintaining the product.
Be careful and avoid personal injury.
Replace the all batteries in the remote control with new ones of the same type. Do not mix old
and mew batteries or different types of batteries.
There is risk of fire or explosion.
Do not recharge or disassemble the batteries. Do not dispose of batteries in a fire.
They may burn of explode.
If the liquid from the batteries gets onto your skin or clothes, wash it well with clean water. Do
not use the remote of the batteries have leaked.
The chemical in batteries could cause burns or other health hazards.
Page 7
Service manual
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2 Function
Indoor unit
1. Operation ON/OFF by remote
controller
2. Sensing by room temperature
Room temperature sensor. Pipe temperature
sensor.
3. Room temperature control
Maintain the room temperature in accordance with
the setting temperature.
4. Starting temperature control
Indoor fan is delayed for 5 sec at the starting.
5. Time Delay Safety control
Restarting is for approx. 3 minutes.
6. Indoor fan speed control
High, med, low, breeze.
7. Operation indication Lamps (LED)
Light up in the LED for each operation mode.
8. Two-direction air vane
The unit will decide the louver direction according
to operation mode.
9. Sleep mode auto control
The fan is turn to low speed (cooling/heating).
The unit will be turn off after seven hours.
10. Independent dehumidification
The function is usually used in rainy days in
springtime or damp areas
11. Self-diag. function
The function will be operate in any operation mode.
12. Air flow Direction control
The louver can be set at the desired position or
swing up and down automatically
13. Auto mode
The unit can be change by the room temperature.
14. Anti-cold function
Prevent the cold wind at the beginning of unit start.
15. Temp. Compensation
16. Defrost mode
17. Auto-restart function
18. Flexible wiring connection
19. Easy clean panel
20. Ionizer (optional)
The function is operated by remote controller.
21．．．．Follow me (optional)
The function is operated by remote controller.
22. Turbo（（（（For some models））））
This function enables the unit to reach the preset
temperature in the shortest time under cooling mode.
Outdoor unit
1. Power relay control
The unit has 3 mins delay between continuously
ON/OFF operations.
2. Low noise air flow system
Bird tail propeller fan makes the outdoor unit run
more quietly
3. Hydrophilic aluminum fin
For the cooling & heating mode only.
The hydrophilic fin can improve the heating
efficiency at operation mode.
4. 4 way valve control
It is only operated in the heating operation mode
except defrosting operation.
5. Anti-rust cabinet
Made from electrolytic zinc steel sheet and anti-rust
coated components.
6. Valve protection cover
It protects the valves and prevents water from
dripping.
Page 8
Service manual
- 5 -
3 Dimension
Indoor unit
Dimension
Mode
W H D
9K 790 265 195
12K 920 292 225
18K 1080 330 225
Page 9
Service manual
- 6 -
outdoor unit
Dimension
Mode
W H D L1 L2
9K 780 540 250 549 276
12K 760 590 285 530 290
18K 845 695 335 560 335
Page 10
Service manual
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4 Specification
MSE-09CRN1-BQ8W MSE-09HRN1-BQ8W
Ph-V-Hz 1, 115V~,60Hz 1, 115V~,60Hz
Capacity Btu/h 9000 9000
Input W 780 780
Rated current A 7.3 7.6
SEER Btu/w.h 13 13
Capacity Btu/h / 10000
Input W / 810
Rated current A / 7.6
HSPF W/W / 7.7
A 13.6 13.6
A 40 40
Model EA82X1C-1FZDU1 EA82X1C-1FZDU1
Type ROTARY ROTARY
Brand TOSHIBA TOSHIBA
Capacity Btu/h 8138 8138
Input W 810 810
Rated current(RLA) A 7.5 7.5
Locked rotor Amp(LRA) A 40 40
Thermal protector B350-135-141E B350-135-141E
Capacitor uF 45µF /250VAC 45µF /250VAC
Refrigerant oil ml 350 350
Model WZDK20-38D WZDK20-38D
Brand Welling Welling
Input W 25 25
Capacitor uF —— ——
Speed(hi/mi/lo) r/min 1250/1000/800 1250/1000/800
m3/h 580/500/420 580/500/420
dB(A) 40/34/27 40/34/27
Model
YDK23-6A YDK23-6A
Brand Broad Ocean Broad Ocean
Input W 77 77
Capacitor uF 6.5 6.5
Speed r/min 910 910
m3/h
1800 1800
dB(A) 55 55
g 1050 1070
MPa 4.5 4.5
Liquid side/ Gas side mm Ф6.35/Ф9.53 Ф6.35/Ф9.53
Max. refrigerant pipe length m 10 10
Max. difference in level m 5 5
℃
17-30 17-30
℃
18-45 -7-45
m
2
14-21 14-21
Operation temp
Ambient temp
Application area
Outdoor noise level
Refrigerant type R410A
Design pressure
Refrigerant
piping
Indoor air flow (Hi/Mi/Lo)
Indoor noise level (Hi/Mi/Lo)
Outdoor
fan motor
Outdoor air flow
Max. current
Starting current
Compressor
Indoor
fan motor
Model
Power supply
Cooling
Heating
Note:
The noise date is base on hemi-anechoic chamber, during actual operation; these values are
normally somewhat different as a result of ambient condition.
The above design and specifications are subject to change without prior notice for product
improvement.
Page 11
Service manual
- 8 -
MSE-12CRN1-BQ8W MSE-12HRN1-BQ8W
Ph-V-Hz
1, 115V~,60Hz 1, 115V~,60Hz
Capacity Btu/h 12000 12000
Input W 1090 1090
Rated current A 10 10
SEER Btu/w.h 13 13
Capacity Btu/h / 12500
Input W / 1060
Rated current A / 10
COP W/W / 7.7
A 17.2 17.2
A 47 47
Model EA108X1C-1FZDU1 EA108X1C-1FZDU1
Type ROTARY ROTARY
Brand TOSHIBA TOSHIBA
Capacity Btu/h 10918 10918
Input W 1085 1085
Rated current(RLA) A 9.9 9.9
Locked rotor Amp(LRA) A 47 47
Thermal protector B440-135-141E B440-135-141E
Capacitor uF
45µF /250VAC 45µF /250VAC
Refrigerant oil ml 350 350
Model WZDK25-38D WZDK25-38D
Brand WELLING WELLING
Input W 32 32
Capacitor uF —— ——
Speed(hi/mi/lo) r/min 1270/1100/1000 1270/1100/1000
m3/h 800/730/600 800/730/600
dB(A) 44/40/36 44/40/36
Model YDK23-6A YDK23-6A
Brand BROAD OCEAN BROAD OCEAN
Input W 75 75
Capacitor uF 6.5uF/260V 6.5uF/260V
Speed r/min 900 900
m3/h
1850 1850
dB(A) 56 56
g 1330 1350
MPa 4.5 4.5
Liquid side/ Gas side mm Ф6.35/Ф12.7 Ф6.35/Ф12.7
Max. refrigerant pipe length m 10 10
Max. difference in level m 5 5
℃
17-30 17-30
℃
18-45 -7-45
m
2
18-26 18-26
Model
Power supply
Cooling
Heating
Max. current
Starting current
Compressor
Indoor
fan motor
Indoor air flow (Hi/Mi/Lo)
Indoor noise level (Hi/Mi/Lo)
Outdoor
fan motor
Outdoor air flow
Operation temp
Ambient temp
Application area
Outdoor noise level
Refrigerant type R410A
Design pressure
Refrigerant
piping
Note:
The noise date is base on hemi-anechoic chamber, during actual operation; these values are
normally somewhat different as a result of ambient condition.
The above design and specifications are subject to change without prior notice for product
improvement.
Page 12
Service manual
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MSE-12CRN1-MQ8W MSE-12HRN1-MQ8W
Ph-V-Hz 1, 208-230V~, 60Hz 1, 208-230V~, 60Hz
Capacity Btu/h 12000 12000
Input W 1070 1070
Rated current A 4.75 4.75
SEER Btu/w.h 13 13
Capacity Btu/h / 12500
Input W / 1060
Rated current A / 4.7
HSPF W/W / 7.7
A 7.8 7.8
A 21/23.5 21/23.5
Model PA108X1C-3FZDU PA108X1C-3FZDU
Type ROTARY ROTARY
Brand TOSHIBA TOSHIBA
Capacity Btu/h 10850/11000 10850/11000
Input W 1070/1075 1070/1075
Rated current(RLA) A 5.2/4.8 5.2/4.8
Locked rotor Amp(LRA) A 21/23.5 21/23.5
Thermal protector B185-135-141C B185-135-141C
Capacitor uF
35µF /370VAC 35µF /370VAC
Refrigerant oil ml 350 350
Model WZDK25-38D WZDK25-38D
Brand WELLING WELLING
Input W 32 32
Capacitor uF —— ——
Speed(hi/mi/lo) r/min 1270/1100/1000 1270/1100/1000
m3/h 800/730/600 800/730/600
dB(A) 44/40/36 44/40/36
Model YDK36-6B YDK36-6B
Brand WELLING WELLING
Input W 85 85
Capacitor uF 2.5uF/450V 2.5uF/450V
Speed r/min 930 930
m3/h
1900 1900
dB(A) 56 56
g 1330 1350
MPa 4.5 4.5
Liquid side/ Gas side mm Ф6.35/Ф12.7 Ф6.35/Ф12.7
Max. refrigerant pipe length m 10 10
Max. difference in level m 5 5
℃
17-30 17-30
℃
18-45 -7-45
m
2
18-26 18-26
Operation temp
Ambient temp
Application area
Outdoor noise level
Refrigerant type R410A
Design pressure
Refrigerant
piping
Indoor air flow (Hi/Mi/Lo)
Indoor noise level (Hi/Mi/Lo)
Outdoor
fan motor
Outdoor air flow
Max. current
Starting current
Compressor
Indoor
fan motor
Model
Power supply
Cooling
Heating
Note:
The noise date is base on hemi-anechoic chamber, during actual operation; these values are
normally somewhat different as a result of ambient condition.
The above design and specifications are subject to change without prior notice for product
improvement.
Page 13
Service manual
- 10 -
MSE-18CRN1-MQ8W MSE-18HRN1-MQ8W
Ph-V-Hz 1, 208-230V~, 60Hz 1, 208-230V~, 60Hz
Capacity Btu/h 18000 18000
Input W 1550 1550
Rated current A 6.8 6.8
SEER Btu/w.h 13 13
Capacity Btu/h / 18000
Input W / 1600
Rated current A / 7
HSPF W/W / 7.7
A 12.7 12.7
A 32.6 32.6
Model PA150X2CS-3KUU PA150X2CS-3KUU
Type ROTARY ROTARY
Brand TOSHIBA TOSHIBA
Capacity Btu/h 15166/15354 15166/15354
Input W 1505/1510 1505/1510
Rated current(RLA) A 7.30/6.65 7.30/6.65
Locked rotor Amp(LRA) A 32.6 32.6
Thermal protector UP3RE0391-T39 UP3RE0391-T39
Capacitor uF
40µF /370VAC 40µF /370VAC
Refrigerant oil ml 750 750
Model YDK36-4C YDK36-4C
Brand Welling Welling
Input W 70/66/63 70/66/63
Capacitor uF
3
µF/450V
3
µF/450V
Speed(hi/mi/lo) r/min 1250/1180/1110 1250/1180/1110
m3/h 1080/1020/960 1080/1020/960
dB(A) 47/44/41 47/44/41
Model YDK53-6KB YDK53-6KB
Brand WELLING WELLING
Input W 165 165
Capacitor uF 3uF/450V 3uF/450V
Speed r/min 840 840
m3/h
2500 2500
dB(A) 59 59
g 2000 2040
MPa 4.5 4.5
Liquid side/ Gas side mm Ф6.35/Ф12.7 Ф6.35/Ф12.7
Max. refrigerant pipe length m 10 10
Max. difference in level m 5 5
℃
17-30 17-30
℃
18-45 -7-45
m
2
30-40 30-40
Model
Power supply
Cooling
Heating
Max. current
Starting current
Compressor
Indoor
fan motor
Indoor air flow (Hi/Mi/Lo)
Indoor noise level (Hi/Mi/Lo)
Outdoor
fan motor
Outdoor air flow
Operation temp
Ambient temp
Application area
Outdoor noise level
Refrigerant type R410A
Design pressure
Refrigerant
piping
Note:
The noise date is base on hemi-anechoic chamber, during actual operation; these values are
normally somewhat different as a result of ambient condition.
The above design and specifications are subject to change without prior notice for product
improvement.
Page 14
Service manual
- 11 -
5 Refrigerant cycle diagram
Cooling only
Heat pump mode
Page 15
Service manual
- 12 -
6 Operation limits
Cooling operation
Outdoor unit air temp. DB℃
Indoor air temp. DB℃
Note: The chart is the result from the continuous operation under constant air temperature
conditions. However, excludes the initial pull-down stage.
Heating operation
Indoor air temp. ℃ DB
Outdoor unit air temp.℃ DB
Note: The chart is the result from the continuous operation under constant air temperature
conditions. However, excludes the initial pull-down stage.
Page 16
Service manual
- 13 -
7 Wiring diagram
MSE-09CRN1-BQ8W;
Indoor unit
:
outdoor unit:
COMP
CA P1
1 2
M
FAN2
RED
RED
XT1
1 2
C
S
R
2
N
L 1
4
3
WIRING DIAGRAM
(OUTDOOR UNIT)
CODE
COMP
CAP1
FAN2
CAP2
XTI
CT1
RELAY
PAR T NAME
COMPRE SSOR
COMPRE SSOR CAP ACITOR
OUTDOO R FAN
OUTDOO R FAN CA PACITOR
7-WAY TERMINAL
CURREN T INDUCT OR
COMPRE SSOR REL AY
CN2
CN3
CN 4
CN10
CN9
BROW N
BLUE
BLAC K
RED
RE LA Y
WHITE
BLACK
Y/G
WH ITE
WH ITE
RE DRE D
BLACK
BL UE WHIT E
Y/ G
P OWER SUPP LY
TO IN DOO R U NIT
P1
P2
N
N
L
Y/G
Y/G
CAP2
G
G
G
CT1
G
Page 17
Service manual
- 14 -
MSE-09HRN1-BQ8W
Indoor unit
:
outdoor unit:
COMP
CAP1
M
F AN2
RED
RED
XT 1
C
S
R
WIRING DIAGRAM
(OUTDOOR U NIT )
CO DE
CO MP
CA P1
FA N2
CA P2
XT I
CT 1
RE LAY
VA LVE
FS 1,FS2
PART NAME
COMPRES SOR
COMPRES SOR CA PACITO R
OUTDOOR FAN
OUTDOOR FAN C APACIT OR
7-WAY T ERMINA L
CURRENT INDUC TOR
COMPRES SOR RE LAY
FUSE
REVERSI NG VAL VE
CN2
C N3
CN4
CN10
CN6
CT 1
BROWN
BLU E
BLA CK
RED
R EL AY
WHIT E
BLAC K
Y/G
WHITE
RE D
BLACK
BLUE WHI TE
Y/G
POWER SUP P LY
TO INDOOR UN IT
P1
P 2
N
N
L
CN5
BLAC K
( OR )BLU E
FS2
FS1
VALVE
CA P2
WHITE
G
G
G
G
Y/G
Y/G
CN1
C O N D E N S A T O R
S E N S O R
B LACK
( OR )BLU E
Page 18
Service manual
- 15 -
MSE-12CRN1-BQ8W
Indoor unit
:
outdoor unit:
COMP
CA P1
1 2
M
FAN2
RED
RED
XT1
1 2
C
S
R
2
N
L 1
4
3
WIRING DIAGRAM
(OUTDOOR UNIT)
CODE
COMP
CAP1
FAN2
CAP2
XTI
CT1
RELAY
PAR T NAME
COMPRE SSOR
COMPRE SSOR CAP ACITOR
OUTDOO R FAN
OUTDOO R FAN CA PACITOR
7-WAY TERMINAL
CURREN T INDUCT OR
COMPRE SSOR REL AY
CN2
CN3
CN 4
CN10
CN9
BROW N
BLUE
BLAC K
RED
RE LA Y
WHITE
BLACK
Y/G
WH ITE
WH ITE
RE DRE D
BLACK
BL UE WHIT E
Y/ G
P OWER SUPP LY
TO IN DOO R U NIT
P1
P2
N
N
L
Y/G
Y/G
CAP2
G
G
G
CT1
G
Page 19
Service manual
- 16 -
MSE-12HRN1-BQ8W
Indoor unit:
outdoor unit:
COMP
CAP1
M
F AN2
RED
RED
XT 1
C
S
R
WIRING DIAGRAM
(OUTDOOR UNIT )
CO DE
CO MP
CA P1
FA N2
CA P2
XT I
CT 1
RE LAY
VA LVE
FS 1,FS2
PART NAME
COMPRES SOR
COMPRES SOR CA PACITO R
OUTDOOR FAN
OUTDOOR FAN C APACIT OR
7-WAY T ERMINA L
CURRENT INDUC TOR
COMPRES SOR RE LAY
FUSE
REVERSI NG VAL VE
CN2
C N3
CN4
CN10
CN6
CT 1
BROWN
BLU E
BLA CK
RED
R EL AY
WHIT E
BLAC K
Y/G
WHITE
RE D
BLACK
BLUE WHI TE
Y/G
POWER SUPPLY
TO INDOOR UN IT
P1
P 2
N
N
L
CN5
BLAC K
( OR )BLU E
FS2
FS1
VALVE
CA P2
WHITE
G
G
G
G
Y/G
Y/G
CN1
C O N D E N S A T O R
S E N S O R
B LACK
( OR )BLU E
Page 20
Service manual
- 17 -
MSE-12CRN1-MQ8W
Indoor unit:
Outdoor unit
COMP
CA P1
1 2
M
FA N2
RED
XT1
1 2
C
S
R
2
N
L 1
4
3
WIRING DIAGRAM
(OUTDO OR UNIT)
CODE
COMP
CAP1
FAN2
CAP2
XTI
CT1
RELAY
PAR T NAME
COMPRE SSOR
COMPRE SSOR CAP ACITOR
OUTDOO R FAN
OUTDOO R FAN CA PACITOR
7-WAY TERMINAL
CURREN T INDUCT OR
COMPRE SSOR REL AY
CN 2
CN 3
CN 4
CN 1 0
CN9
BR OW N
BLUE
BLAC K
RED
RE LA Y
WH ITE
BLACK
Y/G
WH ITE
WH ITE
RE DRE D
BLACK
WHITE
BL UE
Y/ G
P OWER SUPPLY
TO IN DOO R U NIT
P1
P2
N
N
L
Y/G
Y/G
CAP2
BLUE
G
G
G
G
CT1
Page 21
Service manual
- 18 -
MSE-12HRN1-MQ8W
Indoor unit:
Outdoor unit
COMP
CA P1
M
F AN2
RED
BLUE
X T1
C
S
R
WIRING DIAGRAM
(OUTDOOR UNIT )
CO DE
CO MP
CA P1
FA N2
CA P2
XT I
CT 1
RE LAY
VA LVE
FS 1,FS2
PAR T NAME
COMPRE SSOR
COMPRE SSOR C APACITO R
OUTDOO R FAN
OUTDOO R FAN CAPACIT OR
7-WAY TERMIN AL
CURREN T INDU CTOR
COMPRE SSOR R ELAY
FUSE
REVERS ING VA LVE
CN2
CN 3
C N4
CN10
C N6
BROWN
BLUE
B LA CK
R ED
R ELAY
WHI TE
BLA CK
Y/G
WHITE
RE DRE D
BLACK
BLU E WHI TE
Y/G
POWER SU P PLY
TO INDOOR UNIT
P1
P2
N
N
L
CN5
BL UE
B LUE
FS2
F S1
VALVE
CA P2
WHITE
G
G
G
G
Y/ G
Y/ G
C O N D E N S A T O R
S E N S O R
CN1
CT1
Page 22
Service manual
- 19 -
MSE-18CRN1-MQ8W
Indoor unit:
CN2
CN 9
CN 1
CN1 0
M
~
SWING
SWING
UNIT2
CN6
CN7
C
N
5
Y/ G
R ED
Y /G
W HITE
B LUE
FAN1
TRANS1
CAP1
XT1
RT2
RT1
TO OUTDOOR UNIT
UNIT1
WIRING DIAGRAM
(INDOOR UNIT)
CO DE
UN IT 1
UN IT 2
FA N1
CA P1
SW IN G
TR AN S1
RT 1
RT 2
XT 1
CN 1- CN 11
XP 2, XS 2
PART N AM E
MA IN CO NT RO L PC B
DI SPLAY P CB
IN DOOR FA N
FA N CAP AC IT OR
SW ING M OT OR
TR ANSFO RM ER
RO OM TE MP ER AT UR E SENSO R
PI PE TE MP ER AT UR E SENSO R
5- WAY T ER MI NA L
PC B SOC KE TS
CO NNECT OR S
XS 2
X P2
C N4
CN8
AN ION GE NER ATOR
CN 11
G
Y/G
ON SOME M ODELS
G
G
8
2
5
5
10
5(4)
8
Outdoor unit
CODE
UNIT1
COMP
CAP1
FAN2
CAP2
XT1
XT2
KM1
CT
TRANS1
CN1-CN11
P A RT NAME
OUTD O OR CONTRO L PCB
COMP R ESSOR
COMP R ESSOR CAP ACITOR
OUTD O OR FAN
OUTD O OR FAN CA PACITOR
5-WA Y TERMINAL
MIDD L E TERMINA L
AC C O NTACTOR
CURR E NT INDUCT OR
TRAN S FORMER
PCB S OCKETS
XT 1
XT2
CT
TRANS1
1
2(N )
S
L N
Y/G
Y/G
Y /G
COMP
CAP1
1 2
M
FA N2
KM1
BLU E
BL UE
BLACK
B LACK
BLACK
BL ACK
BLA CK
BLAC K
W HITE
WH ITE
R ED
RED
RE D
RE D
RED
R ED
CAP2
1 2
CN 1
CN 4
CN 3
UNIT1
CN 5
CN 8
CN 6
FU SE 3.1 5A/ 250 V
RED
RED
RED
R ED
C S
R
WIRING DIAGRAM
(OUTDOOR UNIT)
TO I NDO OR UNI T POW ER S UPPLY
Page 23
Service manual
- 20 -
MSE-18HRN1-MQ8W
Indoor unit:
CN2
CN 9
CN 1
CN1 0
M
~
SWING
SWING
UNIT2
CN6
CN7
C
N
5
Y/ G
R ED
Y /G
W HITE
B LUE
FAN1
TRANS1
CAP1
XT1
RT2
RT1
TO OUTDOOR UNIT
UNIT1
WIRING DIAGRAM
(INDOOR UNIT)
CO DE
UN IT 1
UN IT 2
FA N1
CA P1
SW IN G
TR AN S1
RT 1
RT 2
XT 1
CN 1- CN 11
XP 2, XS 2
PART N AM E
MA IN CO NT RO L PC B
DI SPLAY P CB
IN DOOR FA N
FA N CAP AC IT OR
SW ING M OT OR
TR ANSFO RM ER
RO OM TE MP ER AT UR E SENSO R
PI PE TE MP ER AT UR E SENSO R
5- WAY T ER MI NA L
PC B SOC KE TS
CO NNECT OR S
XS 2
X P2
C N4
CN8
AN ION GE NER ATOR
CN 11
G
Y/G
ON SOME M ODELS
G
G
8
2
5
5
10
5(4)
8
Outdoor unit
CODE
UNIT1
COMP
CAP1
FAN2
CAP2
XT1
XT2
VALVE
XP1,XS1
RT3
KM1
CT
TRANS1
CN1-CN11
PART NAME
OUTDOOR CONT RO L PCB
COMPRESSOR
COMPRESSOR C AP ACITOR
OUTDOOR FAN
OUTDOOR FAN CA PACITOR
5-WAY TERMIN AL
MIDDLE TERMI NA L
REVERSING VA LV E
CONNECTORS
PIPE TEMPERA TU RE SENSO R
AC CONTACTOR
CURRENT INDU CT OR
TRANSFORMER
PCB SOCKETS
XT 1
XT2
CT
TRANS1
1
2(N)
S
L N
Y/G
Y/G
Y /G
COMP
CAP1
1 2
M
FA N2
VALVE
KM1
BLU E
B LUE
B LUE
BL UE
BLACK
B LACK
BLACK
BLACK
BLAC K
BLA CK
BLACK
W HITE
WH ITE
R ED
R ED
RE D
RED
R ED
CAP2
1 2
RT3
XP1
XS1
CN 1
CN 4
CN 3
UNIT1
CN 2
CN 5
CN 9
CN 8
CN 6
CN 11
FU SE 3.1 5A/ 250 V
RED
RED
RED
RED
C S
R
WIRING DIAGRAM
(OUTDOOR UNIT)
TO I NDO OR UNI T POW ER S UPPLY
Page 24
Service manual
- 21 -
8 Installation details
8.1 Wrench torque sheet for installation
Torque
mm inch Kg.m
φ6.35 1/4 1.8
φ9.52 3/8 4.2
φ12.7 1/2 5.5
φ15.88 5/8 6.6
φ19.05 3/4 6.6
Outside diameter
8.2 Connecting the cables
The power cord of connect should be selected according to the following specifications sheet.
Amp 10 15 20
mm
2
1.0 1.5 2.5
Grade
8.3 Pipe length and the elevation
Standard
length
Max. Max. Additional
(m) Elevation Elevation refrigerant
Btu/h GAS LIQUID B (m) A (m) (g/m)
3/8’’ (φ9.52) 1/4’’ (φ6.35) 5 5 10 30
1/2’’ (φ12.7) 1/4’’ (φ6.35) 5 5 10 30
1/2’’ (φ12.7) 1/4’’ (φ6.35) 5 8 15 30
5/8’’ (φ15.88) 1/4’’ (φ6.35) 5 10 20 30
5/8’’ (φ15.88) 3/8’’ (φ9.52) 5 10 20 65
5/8’’ (φ15.88) 3/8’’ (φ9.52) 5 15 30 65
3/4’’ (φ19.05) 3/8’’ (φ9.52) 5 15 30 65
Pipe size
7k~12K
16K~28K
30K~36K
Capacity
Page 25
Service manual
- 22 -
Caution:
Capacity is base on standard length and maximum allowance length is base of reliability.
Oil trap should be install per 5-7 meters.
8.4 Air purging of the piping and indoor unit
Required tools:
Hexagonal wrench; adjustable wrench; torque wrenches, wrench to hold the joints and gas leak
detector.
Note:
The air in the indoor unit and in the piping must be purged. If air remains in the refrigeration
piping, it will affect the compressor, reduce the cooling capacity, and could lead to a malfunction
of unit.
Be sure, using a torque wrench to tighten the service port cap (after using the service port), so
that it prevents the gas leakage from the refrigeration cycle.
In case that more
than 5m.
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Service manual
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Procedure：：：：
1. Recheck the piping connections.
2. Open the valve stem of the 2-way valve counterclockwise approximately 90’, wait 10 seconds, and
then set it to closed position.
Be sure to use a hexagonal wrench to operate the valve stem
3. Check for gas leakage.
Check the flare connection for gas leakage
4. Purge the air from the system.
5. Set the 2-way valve to the open position and remove the cap from the 3-way valve’s service port.
6. Using the hexagonal wrench to press the valve core pin, discharge for three seconds and then wait
for one minute.
7. Use torque wrench to tighten the service port cap to a torque of 1.8 kg.m. (18n.m)
8. Set the 3-way valve to the opened position.
9. Mounted the valve stem nuts to the 2-way and 3-way valves.
10. Check for gas leakage.
11. At this time, especially check for gas leakage from the 2-way and 3-way stem nuts, and from the
service port.
Caution:
If gas leakage is discovered in step (3) above, take the following measures.
If the leaks stop when the piping connections are tightened further, continue working from
step (4).
If the gas leaks do not stop when the connections are retightened, repair the location of the
leak, discharge all of the gas through the service port, and then recharge with the specified
amount of gas from a gas cylinder.
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Service manual
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8.5 Pumping down (Re-installation)
Procedure:
1. Confirm that both the 2-way and 3-way valves are set to the opened position.
Remove the valve stem caps and confirm that the valve stems are in the opened position.
Be sure to use a hexagonal wrench to operate the valve stems.
2. Operate the unit for 10 to 15 minutes.
3. Stop operation and wait for 3 minutes, then connect the charge set to the service port of the 3-way
valve.
Connect the charge hose with the push pin to the gas service port.
4. Air purging of the charge hose.
Open the low-pressure valve on the charge set slightly to purge air from the charge hose.
5. Set the 2-way valve to the close position.
6. Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 0.1MPa.
7. Immediately set the 3-way valve to the closed position.
Do this quickly so that the gauge ends up indicating 0.3 to 0.5Mpa.
8. Disconnect the charge set, and amount the 2-way and 3-way valve’s stem nuts and service port caps.
Use a torque wrench to tighten the service port cap to a torque of 1.8 kg.m.
Be sure to check for gas leakage.
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Service manual
- 25 -
8.6 Re-air purging (Re-installation)
Procedure:
1. Confirm that both the 2-way and 3-way valves are set to the closed position.
2. Connect the charge set and a charging cylinder to the service port of the 3-way valve.
3. Leave the valve on the charging cylinder closed.
4. Air purging.
5. Open the valves on the charging cylinder and the charge set. Purge the air by loosening the flare nut
on the 2-way valve approximately 45’ for 3 seconds then closing it for 1 minutes; repeat 3 times.
6. After purging the air, use a torque wrench to tighten the flare nut to on the 2-way valve.
7. Check the gas leakage.
8. Check the flare connections for gas leakage.
9. Discharge the refrigerant.
10. Close the valve on the charging cylinder and discharge the refrigerant until the gauge indicate 0.3 to
0.5 Mpa.
11. Disconnect the charge set and the charging cylinder, and set the 2-way and 3-way valves to the
open position.
12. Be sure to use a hexagonal wrench to operate the valve stems.
13. Mount the valve stems nuts and the service port cap.
Be sure to use a torque wrench to tighten the service port cap to a torque 18N.m.
Be sure to check the gas leakage.
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Service manual
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8.7 Balance refrigerant of the 2-way, 3-way valves
Procedure:
1. Confirm that both the 2-way and 3-way valves are set to the open position.
2. Connect the charge set to the 3-way valve’s service port.
Leave the valve on the charge set closed.
Connect the charge hose with the push pin to the service port.
3. Open the valves (Low side) on the charge set and discharge the refrigerant until the gauge indicates
0.05 to 0.1 Mpa.
If there is no air in the refrigeration cycle [the pressure when the air conditioner is not running is higher than
0.1Mpa, discharge the refrigerant until the gauge indicates 0.05 to 0.1 Mpa. If this is the case, it will not be
necessary to apply a evacuation.
Discharge the refrigeration gradually; if it is discharged too suddenly, the refrigeration oil sill be discharged.
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Service manual
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8.8 Evacuation
Procedure:
1. Connect the vacuum pump to the charge set’s centre hose.
2. Evacuation for approximately one hour.
Confirm that the gauge needle has moved toward -0.1 Mpa (-76 cmHg) [vacuum of 4 mmHg or less].
3. Close the valve (Low side) on the charge set, turn off the vacuum pump, and confirm that the gauge
needle does not move (approximately 5 minutes after turning off the vacuum pump).
4. Disconnect the charge hose from the vacuum pump.
Vacuum pump oil, if the vacuum pump oil becomes dirty or depleted, replenish as needle.
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Service manual
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8.9 Gas charging
Procedure:
1. Connect the charge hose to the charging cylinder.
Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the
cylinder.
2. Purge the air from the charge hose.
Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air (be
careful of the liquid refrigerant).
3. Open the valves (Low side) on the charge set and charge the system with liquid refrigerant.
If the system cannot be charge with the specified amount of refrigerant, if can be charged with a little at a time
(approximately 150g each time0 while operating the air conditioner in the cooling cycle; however, one time is not
sufficient, wait approximately 1 minute and then repeat the procedure.(pumping down-pin).
4. Immediately disconnect the charge hose from the 3-way valve’s service port.
Stopping partway will allow the refrigerant to be discharged.
If the system has been charged with liquid refrigerant while operating the air conditioner, turn off the air
conditioner before disconnecting the hose.
5. Mounted the valve stem caps and the service port
Use torque wrench to tighten the service port cap to a torque of 18N.m.
Be sure to check for gas leakage.
Page 32
Service manual
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9 Electronic function
9.1 Electronic control working environment
Input voltage: 175~253V or 100~130V
Input power frequency: 60Hz
Ambient temperature: -7°C+45°C(C&H type), 18°C+45°C(Cooling only type)
Indoor fan normal working amp is less than 1A
Outdoor fan normal working amp is less than 1.5A
Four-way valve normal working amp is less than 1A
Swing motor: DC12V
Compressor: single-phase power supply. Its normal working amp is less than 20A
9.2 Proper symbols and their meaning
T1: Indoor ambient temperature
T2: Indoor evaporator temperature
T3: Outdoor condenser temperature.
TS: Setting temperature through the remote controller
TE1: Anti-cold wind, from Fan Off to Breeze temperature
TE2: Anti-cold wind, from Breeze to Setting Fan Speed temperature
TE3: Anti-cold wind, from Setting Fan Speed to Breeze temperature
TE4: Anti-cold wind, from Breeze to Fan Off temperature
TE5: Evaporator low temperature protection entering temperature
TE6: Evaporator low temperature protection restoring temperature
TE7: Evaporator high temperature protection, compressor off temperature
TE8: Evaporator high temperature protection, fan off temperature
TE9: Evaporator high temperature protection, restoring temperature
TE10: Condenser high temperature protection, compressor off temperature.
TE11: Condenser high temperature protection, restoring temperature.
TE14: The indoor restoring temperature when the compressor is off on the heating mode.
TE16: The indoor evaporator temperature after the defrost action, fan on temperature.
TC1: Outdoor condenser sensor temperature for the defrost condition 1.
TC2: Condenser sensor temperature after defrost.
TC3: Outdoor condenser sensor temperature for the defrost condition 2.
Page 33
Service manual
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9.3 Function
Remote receiving
Testing and forced running
Position set for indoor unit wind vane
LED displaying and alarm
On or off Timer
Protection for the compressor
Current protection
High temperature protection of indoor heat exchanger at heating mode
Auto defrosting and heating recovery at heating mode
Anti cold air at heating mode
9.4 Protection
9.4.1 3 minutes delay at restart for compressor.
9.4.2 Sensor protection at open circuit and breaking disconnection
9.4.3 Fan Speed is out of control. When Indoor Fan Speed is too high(higher than High Fan+300RPM)or
too low(lower than 400RPM), the unit stops and LED displays failure information and can’t returns to
normal operation automatically.
9.4.4 Cross Zero signal error warning. If there is no Cross Zero signals in 4 minutes, the unit stops and
LED displays failure information and can’t returns to normal operation automatically.
9.4.5 The current protection of the compressor
If compressor turns off for continuously 4 times due to current protection in 5 minutes from Compressor
On, the unit stops and LCD displays failure information and can’t returns to normal operation
automatically.
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Service manual
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9.5 Fan only mode
Fan speed is high/mid/low/ Auto
9.6 Cooling mode
The 4-way valve is closed at cooling mode.
The action of the compressor and the outdoor fan:(T=indoor temperature)
Auto fan at cooling mode:
Anti-freezing control to indoor evaporator at cooling mode ( T: evaporator temp. )
Condenser high temperature protection (only for heat pump)
Page 35
Service manual
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9.7 Dehumidifying mode
Indoor fan speed at low speed.
Protection is same as cooling mode.
9.8 Heating mode
9.8.1 Generally, the 4-way valve is open in heating mode, but it is closed in defrosting mode. 4-way valve
must delay 2 minutes compared with compressor if the compressor changed into non-heating mode or
turned off. 4-way valve doesn't delay in dehumidifying mode.
9.8.2 Generally, the outdoor fan is turned off with the on-off action of compressor in heating mode, except
for the defrosting mode or the end of defrost.
9.8.3 Action of compressor and outdoor fan motor at heating mode: compressor must run for 7 minutes
after starting and then judge temperature. Meanwhile other protections are still valid.
* This parameter can be changed from 0 to 3
9.8.4 Indoor Fan actions at heating mode
Indoor Fan can be set at HIGH/MID/LOW/AUTO by using a remote controller, but Anti-cold wind
function prevails.
Page 36
Service manual
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9.8.5 Anti-cold wind control function at heating mode (T=indoor exchanger temp.)
9.8.6 Auto wind at heating mode (T=indoor temp.)
9.8.7 Indoor evaporator high-temperature protection at heating mode
(T=indoor exchanger temp.)
The louver opens to Standard Angle ANGLHEAT when power is on for the first time
9.9 Defrosting mode(available for heating mode)
9.9.1 Defrosting condition:
Defrost starts when either of the following 1&2:
1. T3 lower than 0’C, lasts for more than 40 minutes, and during this period T3 is lower than -3’C
consecutively reaches 3 minutes.
2. Calculate from the end of latest defrost, evaporator high temp. protection only closes outdoor fan
Page 37
Service manual
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with the compressor still running. Add up to 90 minutes.
9.9.2 Conditions of defrost ending:
Defrosting ends when either of the following:
The time gets to 10 minutes.
T3>20’C.
The circulation is as following:
9.9.3 Defrosting Actions
Remark: when the evaporator pipe temperature sensor more than TE16, the indoor fan start to run.
9.10 Auto mode
9.10.1 The air conditioner automatically selects one of the following operation modes: cooling, heating or
fan only according to the temperature difference between room temperature (TA) and set temperature
(TS).
9.10.2 The indoor fan blows automatically in corresponding selected mode；
9.10.3 The motion of indoor fan’s blade should accord with the selected operation mode；
9.10.4 One mode should be carried out for at least 15 minutes once selected. If the compressor cannot
start for 15 minutes, reselect the operation mode according to the room temp. and set temp., or reselect
when the set temp. varies
9.11 Force cooling function
9.11.1 Select forced cooling function with the forced cooling button or the switch
9.11.2 The compressor is unconditionally turned on, after 30 minutes cooling operation whose fan mode
Page 38
Service manual
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is set as low, the A/C operates at the DRY mode with a set temp. of 24℃
9.11.3 All protections of remote control cooling are available at forced cooling operation
9.11.4 Forced Auto function
Select forced auto function with the forced auto button or the switch.
In forced auto status the A/C operates at remote control mode with a set temp. of 24℃
Manual operation is controlled by touching buttons and divided into force cooling and forced auto mode.
It transfer between these two modes by pressing the buttons, the cycling order of the button press is as
below graph show to you.
9.12 Sleep mode(Economic mode)
9.12.1 The sleep function is available at cooling, heating or auto mode
9.12.2 Cooling:
The set temperature rise 1 per hour. Two hours later, the set temperature will maintain as a ℃
constant and the fan speed is kept at low speed.
9.12.3 Heating:
The set temperature decrease 1 per hour. Two hours later, th℃ e set temperature will maintain as
a constant and the air circulation is kept at low speed (Anti-cold function takes precedence over all).
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Service manual
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9.12.4 Auto:
After an hour running under economic mode, the set temp will rise 1 ,℃ if it is under cooling mode;
the set temp will decrease 1 ,if it is under heating mode; the set temp will be chang℃ eless, if it is under
fan-only mode; the condition will be the same after the air conditioner running under economic mode
after 2 hours, and during the next time the set temp do not change. The total time is 7 hours, after 7
hours the unit stops.
9.13 Auto restart function
In case of a sudden power failure, this function automatically sets the unit to previous settings before
the power failure when power returns
This function is unavailable in force run mode.
9.14 Turbo mode
9.14.1 For 9K and 12K type only
9.14.2 Under cooling mode (except Force Cooling mode), the indoor fan motor will run in High speed
when receive the signal from remoter controller, and will get back to the presetting speed when receive
again.
9.14.3 The turbo mode will cancel and indoor fan motor will get back to the presetting speed when one
of following condition occur:
a. mode changed;
b. get into Force Cooling mode;
c. turn off the air conditioner;
9.14.4 Sleep mode is not available in this mode.
9.15 Ionizer (air clean) function
9.15.1 Ionizer (air clean) function is effected when the unit is working and controlled by the remote
controller.
9.15.2 This function is active when the unit received the signal from the remote controller first time and
inactive when received the signal again. Repeat this circle when received signal again.
9.15.3 This function is working only when the indoor fan is working.
9.15.4 This function will not stop when the working mode changed, and be inactive when the unit shut
down.
9.16 Follow me function
9.16.1 This function starts when the indoor unit received the signal from remote controller, and the air
conditioner is operated by the temperature information included in the signal and the set temperature.
In this mode, the indoor temperature sensor in the indoor unit is inactive.
9.16.2 When the indoor unit received the signal by pressing the button of remote controller, the buzzer
in indoor unit will sound once. And the remote controller will send the corrected signal automatic per 3
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Service manual
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minutes, the buzzer keep quiet at this time.
9.16.3 When the indoor unit have not received the corrected signal for 7 minutes, this function will be
shut down. The air conditioner is working in common way.
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Service manual
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10 Model and Parameters
MSE
-09C(H)RN1-BQ8W
MSE
-12C(H)RN1-BQ8W
MSE
-12C(H)RN1-MQ8W
I3SEC 14A 18A 11A
I5MIN 12A 16A 9A
IFAN 10.5A 14A 7A
IRESTORE 9A 12.5A 6A
IDEFROST 6.5A 11A 5.5A
HSPEEDH 1250 1270 1270
HSPEEDM 1000 1060 1060
HSPEEDL 800 900 900
HSPEEDS 700 750 750
CSPEEDP 125 1270 1270
CSPEEDH 1250 1270 1270
CSPEEDM 1000 1100 1100
CSPEEDL 800 1000 1000
CSPEEDS 700 900 900
TE1 31 31 31
TE2 34 33 33
TE3 30 27 27
TE4 22 20 20
TE5 4 5 5
TE6 10 12 12
TE7 60 62 62
TE8 54 54 54
TE9 48 48 48
ANGLRANGE 185 160 160
ANGLOFF 106 0 0
ANGLCOOL 160 50 50
ANGLHEAT 30 78 78
ANGLCSL 30 35 35
ANGLCSH 55 60 60
ANGLHSL 30 63 63
ANGLHSH 55 78 78
ANGLDL 30 10 10
ANGLDH 160 78 78
ANGLFL 55 78 78
ANGLFH 140 78 78
TH
DEFROST
14 14 14
TM
DEFROST
15 15 15
TL
DEFROST
16 16 16
PDELAYCOUNT 127 127 127
Page 42
Service manual
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MSE
-18C(H)RN1-MQ8W
Flag0
58H
Flag1
01H
AngleOffL
AngleOffH
B9H
00H
AngleHeatL
AngleHeatH
84H
00H
AngleCoolL
AngleCoolH
5FH
00H
AngleDefL
00H
AngleDefH
00H
AngleMotorOn
39H
AngleStep
25H
AngleLouver
00H
AngleTime
05H
IResume
92H
I5min
C4H
I3sec
D0H
IOFan
A3H
Idefrost
00H
TE1
28H
TE2
2FH
TE3
2DH
TE4
23H
TE5
11H
TE6 1BH
TE7 4EH
TE8 47H
TE9 41H
TE10 50H
TE11 46H
TE12 40H
TE13 45H
TE14 2FH
TE15 47H
TE16 39H
TC1 0FH
TC2 23H
TC3 0CH
DefrostTimeL 58H
DefrostTimeH 02H
Page 43
Service manual
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11 Troubleshooting
11.1 Display board
Operation
The indicator flashes once every second after power is on and illuminates when the air conditioner is in
operation.
Timer indicator:
The indicator illuminates then TIMER is set ON.
PRE-DEF. indicator (For cooling & heating mode only)
The air conditioner starts defrosting automatically if outdoor unit frosts in heating operating.
At this time, PRE-DEF. indicator illuminates.
Auto indicator:
This indicator flashes when the air conditioner is in AUTO operation.
ECON indicator
This indicator illuminates while the air conditioner is in economic operation.
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Service manual
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11.2 Troubleshooting
For 9K and 12K :
Failure phenomenon
Operation
lamp
Timer
lamp
Indoor fan speed has been out of control for over 1 minute
☆
X
Indoor room temp. or evaporator sensor is open circuit or short circuit
☆
On
Over current protection of the compressor occurs 4 times X
☆
EEROM error On
☆
Indoor unit communication error
☆ ☆
illumine simultaneous
Outdoor condenser temperature sensor is open circuit or short circuit
☆ ☆
illumine alternately
r Extinguish
☆
Flash at 5Hz
For 18K:
Failure phenomenon
Operation
lamp
Timer
lamp
Defrosting
lamp
Auto
lamp
Over current protection of the compressor occurs 4 times ☆ ☆ ☆ ☆
Indoor room temp. sensor is open circuit or short circuit X ☆ X X
Temp. sensor on indoor evaporator is open circuit or short circuit ☆ X X X
Temp. sensor on outdoor condenser is open circuit or short circuit
(without for cooling only models)
X X ☆ X
Outdoor unit protects(outdoor temp sensor, phase order etc) X X ☆ ☆
EEROM error X ☆ X ☆
Indoor unit communication error X X X ☆
Page 45
Service manual
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11.3 Diagnostic chart
After energizing, no indicator is lighted and the air conditioner can’t be operated.
For the 9K and 12K models:
Be sure all the wires(including power wires and connection wires)
is OK
Check if AC 115V (or 208-230V) power supply outputs to outdoor
PCB
Check if AC 115V (or 208-230V) exists at primary coil of
transformer
Check if AC 12V and AC 35V (+5%) exist at second coil of
transformer in the outdoor PCB
Outdoor PCB is defective
Yes
Yes
No
Take off the secondary plug of transformer, and then check if AC
12V and AC 35V (+5%) exist at secondary coil of transformer
No
Transformer is defective
No
Check if DC 35V exists between 2 and 3 on the indoor
terminal and DC 12V between 3 and 4
No
Indoor PCB is defective
Check if DC 35V exists at CN6 and 12V at CN3
Yes
No
Yes
No
Change good ones
Yes
Uncertain problem on indoor PCB, change it and
check again
Yes
Outdoor PCB is defective
Yes
Page 46
Service manual
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For 18K and 24K models
Be sure all the wires(including power wires and connection wires)
is OK
Check if AC 208-230V power supply outputs to outdoor PCB
Check if AC 208-230V exists at primary coil of outdoor (and
indoor) transformer
Check if AC 12V exist at second coil of outdoor (and indoor)
transformer
Outdoor (or indoor) PCB is
defective
Yes
Yes
No
Take off the secondary plug of transformer, and then check if AC
12V exist at secondary coil of outdoor (and indoor) transformer
No
Outdoor (or indoor)
transformer is defective
Yes
Yes
Outdoor (or indoor) PCB is
defective
No
Yes
No
Change good ones
Page 47
Service manual
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11.4 Resetting phenomenon often occurs during operation.
(That is automatically entering to the status when power is on.)
The reason is that the instantaneous voltage of main chip is less than 4.5V. Check according to the following procedure:
11.5 Indoor fan speed out of control .
Just for 9K and 12K type when indoor fan speed has been out of control for over 1 minute
Page 48
Service manual
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11.6 Temperature sensor error.
Including the indoor room, indoor evaporator and outdoor condenser temperature sensor.
11.7 Over current protection of the compressor occurs 4
times
11.8 EEROM error
EEROM error, indoor PCB is defective.
Over current protection of compressor occurs 4 times
Page 49
Service manual
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11.9 Outdoor unit protects
11.10 Indoor unit communication error.
Check the if the signal wire is well connection
Change indoor PCB and check if the error is still exit
Connect the signal wire well or change the
signal wire if it’s the problem of the wires.
No
Yes
Indoor PCB failure
No
Outdoor PCB failure, change outdoor PCB
Yes
Check if the power supply is good
Change outdoor PCB and check if the error is still exit
Power supply failure
No
Yes
Outdoor PCB failure
No
Compressor failure
Yes
Page 50
Service manual
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12 Characteristic of temperature sensor
Temp.℃ Resistance KΩ Temp.℃ Resistance KΩ Temp.℃ Resistance KΩ
-10 62.2756 17 14.6181 44 4.3874
-9 58.7079 18 13.918 45 4.2126
-8 56.3694 19 13.2631 46 4.0459
-7 52.2438 20 12.6431 47 3.8867
-6 49.3161 21 12.0561 48 3.7348
-5 46.5725 22 11.5 49 3.5896
-4 44 23 10.9731 50 3.451
-3 41.5878 24 10.4736 51 3.3185
-2 39.8239 25 10 52 3.1918
-1 37.1988 26 9.5507 53 3.0707
0 35.2024 27 9.1245 54 2.959
1 33.3269 28 8.7198 55 2.8442
2 31.5635 29 8.3357 56 2.7382
3 29.9058 30 7.9708 57 2.6368
4 28.3459 31 7.6241 58 2.5397
5 26.8778 32 7.2946 59 2.4468
6 25.4954 33 6.9814 60 2.3577
7 24.1932 34 6.6835 61 2.2725
8 22.5662 35 6.4002 62 2.1907
9 21.8094 36 6.1306 63 2.1124
10 20.7184 37 5.8736 64 2.0373
11 19.6891 38 5.6296 65 1.9653
12 18.7177 39 5.3969 66 1.8963
13 17.8005 40 5.1752 67 1.83
14 16.9341 41 4.9639 68 1.7665
15 16.1156 42 4.7625 69 1.7055
16 15.3418 43 4.5705 70 1.6469
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