Midea MSMBB-12CRDN1-MP0W, MSMBC-18CRDN1-MP0W, MSMBD-22CRDN1-MP5W Service Manual

Revision A: 1502250001, Content updated.
National Electrical Code NFPA70/ANSI C1-1993 or current edition and Canadian Electrical Code Part1 CSA C.22.1.
Installation or repairs made by unqualified persons can result in hazards to you and others.
Failure to carefully read and follow all instructions in this manual can result in equipment
SERVICE MANUAl
DC Inverter Air Conditioner
Table of Contents
1. Precaution
2. Part Names
3. Dimension
4. Refrigerant Cycle Diagram
5. Printed Circuit Board Connector Wiring Diagram of Outdoor Unit
6. Installation Details
7. Operation Characteristics
8. Electronic Function
9. Troubleshooting
10. Disassembly Instructions
Mini Split 3D
MSMBB-12CRDN1-MP0W MSMBC-18CRDN1-MP0W MSMBD-22CRDN1-MP5W
WARNING
Installation MUST conform with local building codes or, in the absence of local codes, with the
malfunction, property damage, personal injury and/or death.
Models:
This Manual Is For Qualified Service Engineer Use Only
1. Precaution
..................................................................................................................................................... 1
1.1 Safety Precaution .......................................................................................................................... 1
1.2 Warning .......................................................................................................................................... 1
2. Part Names
.................................................................................................................................................... 4
2.1 Model Names of Indoor/Outdoor units .......................................................................................... 4
2.2 Part names of Indoor/Outdoor units .............................................................................................. 5
3. Dimension
..................................................................................................................................................... 6
3.1 Indoor Unit ..................................................................................................................................... 6
3.2 Outdoor Unit................................................................................................................................... 8
4. Refrigerant Cycle Diagram
.......................................................................................................................... 9
5. Printed Circuit Board Connector Wiring Diagram of Outdoor unit
....................................................... 10
6 Installation Details
....................................................................................................................................... 12
6.1 Wrench torque sheet for installation ............................................................................................ 12
6.2 Connecting the cables ................................................................................................................. 12
6.3 Pipe length and the elevation ...................................................................................................... 12
6.4 Installation for the first time .......................................................................................................... 13
6.5 Adding the refrigerant after running the system for many years ................................................. 14
6.6 Procedure when servicing the indoor unit refrigeration circuit. .................................................. 14
6.7 Evacuation after servicing the outdoor unit refrigeration circuit. ................................................ 16
7. Operation Characteristics
......................................................................................................................... 18
8. Electronic function
..................................................................................................................................... 19
8.1 Abbreviation ................................................................................................................................. 19
8.2 Display function ........................................................................................................................... 19
8.3 Main Protection ............................................................................................................................ 20
8.4 Operation Modes and Functions ................................................................................................. 21
9. Troubleshooting
......................................................................................................................................... 26
9.1 Indoor Unit Error Display ............................................................................................................. 27
9.2 Outdoor unit error display ............................................................................................................ 28
9.3 Diagnosis and Solution ................................................................................................................ 31
10 Disassembly Instructions
......................................................................................................................... 56
10.1 Indoor unit .................................................................................................................................. 56
10.2 Outdoor unit ............................................................................................................................... 60
Table Of Contents
1
1. Precaution
1.1 Safety Precaution
n To prevent injury to the user or other
people and property damage, the following instructions must be followed.
n Incorrect operation due to ignoring
instruction will cause harm or damage.
n Before service the unit, be sure to
read this service manual at first.
1.2 Warning
Ø Installation
n Do not use a defective or underrated
circuit breaker. Use this appliance on a dedicated circuit.
There is risk of fire or electric shock.
n 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.
n Always ground the product.
There is risk of fire or electric shock.
n Install the panel and the cover of
control box securely.
There is risk of fire of electric shock.
n Always install a dedicated circuit and
breaker.
Improper wiring or installation may cause electric shock.
n Use the correctly rated breaker of
fuse.
There is risk of fire or electric shock.
n Do not modify or extend the power
cable.
There is risk of fire or electric shock.
n Do not install, remove, or reinstall the
unit by yourself (customer).
There is risk of fire, electric shock, explosion, or injury.
n 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.
n For installation, always contact the
dealer or an authorized service center.
n Do not install the product on a
defective installation stand.
n 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.
n Do not let the air conditioner run for a
long time when the humidity is very high and a door or a window is left open.
n Take care to ensure that power cable
could not be pulled out or damaged during operation.
There is risk of fire or electric shock.
n Do not place anything on the power
cable.
There is risk of fire or electric shock.
n Do not plug or unplug the power
supply plug during operation.
There is risk of fire or electric shock.
n Do not touch (operation) the product
with wet hands.
n Do not place a heater or other
appliance near the power cable.
There is risk of fire and electric shock.
n Do not allow water to run into
electrical parts.
It may cause fire, failure of the product, or electric shock.
n Do not store or use flammable gas or
combustible near the product.
There is risk of fire or failure of product.
n Do not use the product in a tightly
closed space for a long time.
Oxygen deficiency could occur.
n When flammable gas leaks, turn off
the gas and open a window for ventilation before turn the product on.
n If strange sounds or smoke comes
from product, turn the breaker off or disconnect the power supply cable.
2
There is risk of electric shock or fire.
n 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.
n 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.
n When the product is soaked, contact
an authorized service center.
There is risk of fire or electric shock.
n Be caution that water could not enter
the product.
There is risk of fire, electric shock, or product damage.
n Ventilate the product from time to
time when operating it together with a stove etc.
There is risk of fire or electric shock.
n Turn the main power off when
cleaning or maintaining the product.
There is risk of electric shock.
n 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.
n Take care to ensure that nobody
could step on or fall onto the outdoor unit.
This could result in personal injury and product damage.
Ø CAUTION
n Always check for gas (refrigerant)
leakage after installation or repair of product.
Low refrigerant levels may cause failure of product.
n Install the drain hose to ensure that
water is drained away properly.
A bad connection may cause water leakage.
n Keep level even when installing the
product.
It can avoid vibration of water leakage.
n 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.
n Use two or more people to lift and
transport the product.
n 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.
Ø Operational
n Do not expose the skin directly to
cool air for long time. (Do not sit in the draft).
n 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.
n Do not block the inlet or outlet of air
flow.
n 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.
n Do not touch the metal parts of the
product when removing the air filter. They are very sharp.
n Do not step on or put anything on the
product. (outdoor units)
n 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.
n Do not insert hands or other objects
through air inlet or outlet while the product is operated.
n Do not drink the water drained from
the product.
3
n Use a firm stool or ladder when
cleaning or maintaining the product.
Be careful and avoid personal injury.
n Replace the all batteries in the remote
control with new ones of the same type. Do not mix old and new batteries or different types of batteries.
There is risk of fire or explosion.
n Do not recharge or disassemble the
batteries. Do not dispose of batteries in a fire.
They may burn of explode.
n 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.
4
2. Part Names
2.1 Model Names of Indoor/Outdoor units
Series
Capacity Indoor units
Outdoor units
Inverter
12k MSMBB-12CRDN1-MP0W MOB1-12CDN1-MP0W 18k MSMBC-18CRDN1-MP0W MOC-18CDN1-MP0W 22k MSMBD-22CRDN1-MP5W MOF1-22CDN1-MP5W
5
2.2 Part names of Indoor/Outdoor units
6
3. Dimension
3.1 Indoor Unit
Model W D H
MSMBB-12CRDN1-MP0W
810 mm
(31.89in)
200 mm
(7.87in)
300 mm
(11.81in)
MSMBC-18CRDN1-MP0W
980 mm
(38.58in)
225 mm
(8.86in)
325 mm
(12.80in)
MSMBD-22CRDN1-MP5W
1090 mm
(42.91in)
235 mm
(9.25in)
338 mm
(13.31in)
7
For MSMBB-12CRDN1-MP0W,
For MSMBC-18CRDN1-MP0W,
For MSMBD-22CRDN1-MP5W,
8
3.2 Outdoor Unit
More than 60cm(23.6in)
More than 70cm(27.6in)
More than 30cm(11.8in)
More than 60cm(23.6in) (Service space)
Fence or
obstacles
More than 30cm(11.8in)
Note: The above drawing is only for reference. The appearance of your units may be different.
Model W D H W1 A B
MOB1-12CDN1-MP0W
780mm (30.7in)
250mm
(9.8in)
540mm (21.3in)
843mm (33.2in)
549mm (21.6in)
276mm (10.9in)
MOC-18CDN1-MP0W
760 mm
(29.92in)
285 mm
(11.22in)
590 mm
(23.23in)
823 mm
(32.4in)
530 mm
(50.87in)
290 mm
(11.42in)
MOF1-22CDN1-MP5W
845mm (33.3in)
320mm (12.6in)
700mm (27.6in)
908mm (35.7in)
560mm (22.0in)
335mm (13.2in)
9
4. Refrigerant Cycle Diagram
For cooling only models,
INDOOR
OUTDOOR
LIQUID SIDE
GAS SIDE
HEAT EXCHANGE (EVAPORATOR)
HEAT EXCHANGE (CONDENSER)
COMPRESSOR
CAPILIARY TUBE
10
5. Printed Circuit Board Connector Wiring Diagram of Outdoor unit
MOB1-12CDN1-MP0W,
U
V
W
T3-TipeT4-OutDoorTP
PFC-1310
202302130949 CE-KFR26W/BP2(MDY02+1243).D.13.WP2-1
[1.4]2014.02.20
HF
LF
IC2
IC6 PC851
IC5PC817
CN27
FAN_C
CN26 FAN_C
BR2
HS3
OCP1
COM1
HIN1
VB1
HS1
FO2
OCP2
FO1
LS1
U
LS2
V
LS3
W
VBB
VCC3
VB3
COM3
LIN3
OCP3
FO3
HS2
VB2
VCC2
HIN2
COM2
LIN2
VCC1
LIN1
HIN3
IPM1
BR1
PTC1
CN2
CN1
CN8
CN7
CN21
+
LED1 Yellow
C6
R33 R16
C23
C7
L1
RY1
D3
D1
E8
R67
R66R61
R57R56
R53
R4
C9
CN19AC_FAN
D4
C28
C18
R77
D5
C54
R65
R64
R5
C52
ZR2
ZR1
RY5
RY4
RY3
RY2
R58
R55R47
R46
R45
R44
R43
R42
R39
R36
R35
R32
R31
R30 R29
R21
R19
R18
R17
R15
R14
R11
R10
R9
R8
R7
R6
R2
Q1
IC7
IC1
FUSE1T20A/250VAC
E17
E21
E15
E12E9
+
+
E6
DSA1
D7
D6
D2
C49
C42
C41
C40
C39
C38
C36
C35
C33
C31
C30
C26
C25
C24
C22
C20
C16
C15
C14
C13
C12
C11
C10
C3
C2
C1
IC8
+
-
~~
SSR1
E1
E4
E5
R59
R12
C27
E2
R78
E3
T1
C29
IC10
CN22
CN14 TestPort
C32 C34
C58
C61
C62
C63
C76
C77
C85
C89
C90
C91
C98
C100
C108
C113
C71C51
C148
CN28E2-Burning
CN29Simulation
D13
D14
E11
E13
E10
IC4-1
L3
R24
R25
R26
R27
R28
R60
R63
R82
R83
R84
R85
R86R87
R88
R89
R90
R92
R94
R96
R97
R99
R101R103
R105
R111
R118
R122
R129 R20
R48
R51
R49
R50
R145
R146
C37
C70
C80
R13
E16
R3
R37
R38
R79
R91
C8
C17
R40
R41
R1
C82 C83
IC9
IC4
D9
R54
CN9
Earth
LED2RED
R23
CN42
CompTop
C21
C19
R34
C5
C45
C46
CN60
CN11
4-WAY-L
CN12
4-WAY-N
CN23
N-IN
CN24
L-IN
CN25
S
CN20
C4
R52
C43
C44
C81
R22
D8
X1
DZ1DZ4
DZ5
DZ2
IC3
C47
C48
DZ3
connect to the terminal
CN24(L-IN)-CN23(N-IN)
208-230V AC
power supply
when 4-way is ON, output 208-230VAC
connect to the 4-WAY
CN12 CN11
when heater is ON, output 208-230VAC
CN60
connect to compressor heater
3-4 0VAC / 208-230VAC (high speed running)
5
4
3
2
1
connect to outdoor AC FAN
CN19
2-4 0VAC / 208-230VAC (low speed Running)
1
2
3
4
5
CN27 CN26
AC FAN-CAPACITOR
208-230VAC
CN20
CN1
connect TO REACTOR 2-10V AC(standby); 30-150V AC(running);
connect to the compressor 0VAC (standby) 10-200VAC (running)
W
V
U
CN22
room temp sensor(3-4) RT pipe temp sensor(1-2) RT
Exaust temp sensor(5-6) RT
123546
NO USE
CN29
NO USE
CN28
210-300VDC (Running)
CAPACITOR Voltage
290-330VDC (standby)
+-
LED1
CN14
connect to detector
test port
MOC-18CDN1-MP0W
11
MOF1-22CDN1-MP5W
12
6 Installation Details
6.1 Wrench torque sheet for installation
Outside diameter Torque
Additional tightening
torque
Ф6.35mm 1/4in 1500N.cm(153kgf.cm) 1600N.cm(163kgf.cm)
Ф9.52mm 3/8in 2500N.cm(255kgf.cm) 2600N.cm(265kgf.cm)
Ф12.7mm 1/2in 3500N.cm(357kgf.cm) 3600N.cm(367kgf.cm)
Ф15.9mm 5/8in 4500N.cm(459kgf.cm) 4700N.cm(479kgf.cm)
Ф19mm 3/4in 6500N.cm(663kgf.cm) 6700N.cm(683kgf.cm)
6.2 Connecting the cables
The power cord should be selected according to the following specifications sheet.
Appliance Amps AWG Wire Size
10 18 13 16 18 14 25 12 30 10
The cable size and the current of the fuse or switch are determined by the maximum current indicated on the nameplate which located on the side panel of the unit. Please refer to the nameplate before selecting the cable, fuse and switch.
6.3 Pipe length and the elevation
Models
Pipe size
Gas Liquid
MSMBB-12CRDN1-MP0W+MOB1-12CDN1-M P0W
3/8in
(Ф9.52mm)
1/4in
(Ф6.35mm)
MSMBC-18CRDN1-MP0W+MOC-18CDN1-M P0W
1/2in
(Ф12.7mm)
1/4in
(Ф6.35mm)
MSMBD-22CRDN1-MP5W+MOF1-22CDN1-
M P5W
5/8in
(Ф15.9mm)
3/8in
(Ф9.52mm)
Models
Standa
rd
length
Max.
Elevation
Max.
Length
A
Additional
refrigerant
MSMBB-12CRDN1-MP0W+ MOB1-12CDN1-M P0W
7.5m
(24.6ft)
10m
(32.8ft)
25m
(82.0ft)
15g/m
(0.16oz/ft)
MSMBC-18CRDN1-MP0W+ MOC-18CDN1-M P0W
7.5m
(24.6ft)
20m
(65.6ft)
30m
(98.4ft)
15g/m
(0.16oz/ft)
MSMBD-22CRDN1-MP5 W+MOF1-22CDN1-M P5W
7.5m
(24.6ft)
20m
(65.6ft)
30m
(98.4ft)
30g/m
(0.32oz/ft)
13
6.4 Installation for the first time
Air and moisture in the refrigerant system have undesirable effects as below:
Pressure in the system rises.
Operating current rises.
Cooling or heating efficiency drops.
Moisture in the refrigerant circuit may
freeze and block capillary tubing.
Water when mixed with the refrigerant and oil
will create an acid that will damage the motor windings and components in the refrigerant
system.
Therefore, the indoor units and the pipes between indoor and outdoor units must be leak tested and evacuated to remove gas and moisture from the system.
Gas leak check (Soap water method):
Apply soap water or a liquid neutral detergent on the indoor unit connections or outdoor unit Connections with a soft brush to check for leakage of the connecting points of the piping. If bubbles come out, the pipes have leakage.
1. Air purging with vacuum pump
1) Completely tighten the flare nuts of the
indoor and outdoor units, confirm that both the 2-way and 3-way valves are set to the
Front seated.
2) Connect the low pressure gauge to the 3 way
service valve access port..
3) Connect the middle hose of the gauge
manifold (usually yellow) to the vacuum pump.
4) Fully open the handle for the low pressure
gauge..
5) Start the vacuum pump and operate according
to manufacture spec's.
6) Perform an evacuation for a minimum of 30 minutes and check that the low pressure (compound) gauge indicates a vacuum of 29.9 in/hg (500 microns) A vacuum gauge should be used if available. If the proper vacuum cannot be achieved the vacuum pump should be run for an additional 20 minutes. If after the additional 20 minutes the vacuum still cannot be achieved the is a leak in the system and must be located and repaired. follow the leak checking procedure as mentioned before. If the vacuum is achieved, close the low pressure gauge handle off and shut the vacuum pump off. Recheck the reading after 10 minutes, the vacuum may change slightly, this is normal.
7) The system is now dry and free of
contaminates, refrigerant pressure should now be added to the system from a source other than the system before opening the 2 way and 3 way valves for system operation.
8) The 2 way and 3 way valve can now be
opened for the system operation
2. Air purging by refrigerant
Procedure:
1). Confirm that both the 2-way and 3-way
valves are set to the closed position.
2). With a container of refrigerant and a gauge
manifold set, connect the low pressure gauge hose
14
to the 3 way valve service port and a charging
cylinder to the service port of the 3-way valve.
3). Open the valve on the refrigerant container and
the low pressure gauge to allow the refrigerant to enter the system, next loosen the flare connection on the 2 way valve line to purge the air and contaminants from the system for 30 to 50 seconds, then retighten the connection.
4). Next allow the pressure from the refrigerant to
reach 100 psi and then close the low pressure gauge and the refrigerant container and check the 2 way and 3 way valve line connections for leaks with liquid soap or electronic leak detector.
5). After the system has been check for leaks the
pressure should be adjusted to about 25 to 50 psi.
6). You can now disconnect the gauge manifold
and refrigerant container from the system and open the 2 way and 3 way valves for system operation
7). 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(13.27 ft.lbs). Be sure to check the gas leakage.
6.5 Adding the refrigerant after running the system for many years
Procedure
1). 1st step; Connect the low pressure gauge from
the gauge manifold set to the 3 way service valve (this is the blue hose on most sets) 2nd step; Connect the middle hose from the manifold set to the refrigerant container (this is the yellow line on most sets). with refrigerant 410A the container must be inverted (upside down) when adding the refrigerant. Note that the 2 way and 3 way valves
must be in the open position. 3rd step; the air in the gauge hoses needs to be purged out. use the pressure from the system to purge the low side line, loosen the connection on the manifold for a second, next open the to valve on the refrigerant container to pressurize the line, now loosen that hose at the manifold for a second and purge that line.
3) Next step is to set the refrigerant container on
an electronic charging scale and record the weight or zero the scale depending on the scale used. Next determine the refrigerant charge to be added.
4) Start the unit in the cooling mode and lower the
set point so the unit wont shut off during the charging procedure.
5) Refrigerant can now be added to the system,
open the low pressure valve on the gauge manifold set to start charging the unit with liquid refrigerant, keep track of the refrigerant being added to the system (do not overcharge the system)
6). Once the correct charge has been added to the
system close the low pressure valve on the gauge manifold set and record the operating pressure. The system is now charged and the unit can be shut off. Close the valve on the refrigerant container and disconnect the hose from the manifold set, also disconnect the hose from the 3 way valve and replace and torque all caps.
7). Mount the valve stem caps and the service
port Use torque wrench to tighten the service port cap to a torque of 18N.m(13.27 ft,lbs).
Always leak check after servicing the refrigerant system.
6.6 Procedure when servicing the indoor
unit refrigeration circuit.
1. Pumping down the system (isolating the
refrigerant charge in the condensing unit)
15
Procedure
1). With the unit in the cooling mode and a low set
point remove all caps from the 3 way and 2 way valves, next attach the low pressure gauge to the 3 way service valve port and purge the air from that hose by loosening the hose at the manifold for a second, be sure the low pressure gauge valve is closed. be sure to record the operating pressure, you will need to know this when you complete the service on the indoor unit and restart the system. Now prepare to close both valves on the unit starting with the 2 way valve (this is called front seating the valve) also prepare to shut the power off to the outdoor unit.
2). Connect the charge hose with the push pin of handle lo to the 3-way valves gas service port.
3). Air purging of the charge hose. Open the handle Lo valve of the manifold valve slightly to purge air from the charge hose for 5 seconds and then close it quickly.
4). Now close the 2 way valve and monitor the low
pressure gauge. the pressure will start to drop.
5). Operate the unit in the cooling mode and
disconnect the power to the outdoor unit when the low side gauge reads a slight vacuum, running the compressor in a vacuum could damage the motor windings. Note that units with extended lines and additional refrigerant charge may not be able to achieve a vacuum, this is because the outdoor unit can only store a certain amount of refrigerant, this is normal (the amperage of the compressor will have to be monitored in this case) Stop compressor when the amperage approaches the name plate FLA rating indicates 0.1Mpa(14.5Psi).
6). Now close the 3 way valve right away. the
pressure will rise during this time, this is normal. There will be some pressure left in the system this is normal, The indoor unit is now ready to be serviced.
Disconnect the charge set, and tighten the 2-way and 3-way valves stem nuts. Use a torque wrench to tighten the 3-way valves service port cap to a torque of 18N.m(= 13.27
ft.lbs).
Be sure to check for gas leakage.
2. Sweeping (air purging) the system with
refrigerant after the service to the refrigerant circuit of the indoor unit is complete.
Procedure:
Sweeping the system can be used when the unit has been pumped down, this eliminates the need to loosen the flare connection on the 2 way valve (loosening and retightening flare connections could cause a refrigerant leak)
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 Leave the valve on the Refrigerant container.
3). Do not loosen the flare connection, Start with
the hose from the low pressure gauge that has been connected to the 3 way valve service port and loosen it at the gauge manifold connection, next open the 2 way valve 1/2 half of a turn (this will release the refrigerant that has been isolated in the outdoor unit) The refrigerant will travel thru the small refrigerant line and evaporator coil in the indoor unit and back out the low pressure hose that has been loosened let the refrigerant sweep for about 50 seconds, this will push and remove
16
any air moisture and noncodensables from the refrigeration circuit. After 50 seconds has passed tighten the hose on the low pressure gauge. The sweep is now complete. Next step, open the 2 way valve all the way then the 3 way valve all the way and check for leaks.
4). Next step, Start the unit in the cooling mode
and check the pressure (remember the pressure you recorded?) The unit is going to be low on refrigerant from the sweeping process, add refrigerant as needed from the refrigerant container in the liquid state to achieve the operating pressure that you recorded. The process is now complete.
Check the flare connections for gas leakage.
5). Discharge the refrigerant. Close the valve on the charging cylinder and discharge the refrigerant by loosening the flare nut on the 2-way valve approximately 45 until the gauge indicates 0.3Mpa(43.5Psi) to 0.5
Mpa(72.5Psi).
6). Disconnect the charge set and the charging cylinder, and set the 2-way and 3-way valves to the open position Be sure to use a hexagonal wrench to operate the valve stems.
7). 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.
6.7 Evacuation after servicing the outdoor
unit refrigeration circuit.
1. Evacuation of the complete refrigeration
circuit, Indoor and outdoor unit.
Procedure:
1). Confirm that both the 2-way and 3-way
valves are set to the opened position.
2). Connect the vacuum pump to 3-way valves
service port.
3). Evacuation for approximately one hour.
Confirm that the compound meter indicates
-0.1Mpa(14.5Psi), 500 Microns / 29.9 in,hg.
4). 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).
5). Disconnect the charge hose from the
vacuum pump.
2. Refrigerant charging
Procedure:
1). Connect the charge hose to the charging
cylinder, open the 2-way valve and the 3-way valve Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder. If the refrigerant is R410A, make the cylinder bottom up to ensure liquid charge.
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) Put the charging cylinder onto the electronic
scale and record the weight.
4). 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, or can be
17
charged with a little at a time (approximately 150g each time) , operating the air conditioner in the cooling cycle; however, one time is not sufficient, wait approximately 1 minute and then repeat the procedure.
5).When the electronic scale displays the proper weight, disconnect the charge hose from the 3-way valves service port immediately If the system has been charged with liquid refrigerant while operating the air conditioner, turn off the air conditioner before disconnecting the hose.
6). 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.
18
7. Operation Characteristics
Temperature
Mode
Cooling operation Heating operation Drying operation
Room temperature
17℃~32
(62℉~90)
0℃~30
(32℉~86)
10℃~32
(50℉~90)
Outdoor temperature
0°C50°C
(32°F122°F)
-15°C30°C (5°F86°F)
0°C50°C
(32°F122°F)
-15°C50°C
(5°F122°F)
(For the models with
low temperature cooling system)
!"(#)
$
+32
CAUTION:
1. If the air conditioner is used beyond the above conditions, certain safety protection features may
come into operation and cause the unit to operate abnormally.
2. The room relative humidity should be less than 80%. If the air conditioner operates beyond this figure, the surface of the air conditioner may attract condensation. Please set the vertical air flow louver to its maximum angle (vertically to the floor), and set HIGH fan mode.
3. The optimum performance will be achieved during this operating temperature zone.
19
8. Electronic function
8.1 Abbreviation
T1: Indoor room temperature T2: Coil temperature of evaporator T3: Coil temperature of condenser T4: Outdoor ambient temperature T5: Compressor discharge temperature
8.2 Display function
8.2.1 Icon explanation on indoor display board.
Digital display: Displays the temperature settings when the air conditioner is operational. Displays the room temperature in FAN mode. Displays the self-diagnostic codes.
Dispalys ’ for three seconds when Timer ON, Fresh, Swing, Turbo or Silence feature is activated.
Dispalys ’ for three seconds when Timer OFF is set.
Dispalys for three seconds when Fresh, Swing, Turbo or Silence feature is cancelled.
Dispalys under deforsting operation.
Dispalys when anti-cold air feature is activated under heating mode.
Dispalys during self clean operation (if aplicable).
Dispalys under 8 heating operation (if aplicable). When ECO function(optional) is actived,the
illuminates gradually one by one as
In one second interval.
WIFI control display(optional) Displays when the WIFI control feature is acticated.(Not available when the unit does not have this function)
NOTE: A guide on using the infrared remotr is included in this literature package.
20
8.3 Main Protection
8.3.1 Three minutes delay at restart for compressor
Less than 1 minute delay for the 1st time stand-up and 3 minutes delay for others.
8.3.2 Temperature protection of compressor top
The unit will stop working when the compressor top temp. protector cut off, and will restart after the compressor top temp. protector restart.
8.3.3 Temperature protection of compressor discharge
Compressor discharge temp. T5>115(239°F) for 5s, compressor stops.
8.3.4 Fan speed is out of control
When Indoor fan speed keeps too low (300RPM) for certain time, the unit will stop and the LED will display the failure
8.3.5 Inverter module protection
The Inverter module has a protection function about current, voltage and temperature. If these protections happen, the corresponding code will display on indoor unit and the unit will stop working.
8.3.6 Indoor fan delayed open function
When the unit starts up, the louver will be active immediately and the indoor fan will open 10s later. If the unit runs in heating mode, the indoor fan will be also controlled by anti-cold wind
function.
8.3.7 Compressor preheating functions
Preheating permitting condition: When T4(outdoor ambient temperature) 3°C(37.4°F), the preheating function will be activated.
8.3.8 Sensor protection at open circuit and breaking disconnection.
When theres only one temperature sensor in malfunction , the air conditioner will keep working but show the error code, in case of any emergency use. When theres more than one temperature sensor in malfunction, the air conditioner will stop working
8.3.9 Zero crossing detection error protection
If AC detects time interval is not correct, the unit will stop and the LED will display the failure.
8.3.10 Refrigerant leakage detection
This function is only active in cooling mode. It can better prevent the compressor being damaged by refrigerant leakage or compressor overload. Open condition: When compressor is active, the value of the Coil temperature of evaporator T2 has no change or very little change.
21
8.4 Operation Modes and Functions
8.4.1 Fan mode
(1) Outdoor fan and compressor stop. (2) Temperature setting function is disabled, and no setting temperature is displayed. (3) Indoor fan can be set to high/med/low/auto. (4) The louver operates same as in cooling mode. (5) Auto fan:
a
b
c
d
T1
e
8.4.2 Cooling Mode
8.4.2.1 Compressor running rules
When T1-Ts<-2(28.4°F), the compressor will stop, when T1TS>-0.5(31.1°F),the compressor will be activated. When the AC run in mute mode, the compressor will run with low frequency. When the current is more than setting value, the current protection function will be activated, and the compressor will stop.
8.4.2.1 Outdoor fan running rules
The outdoor unit will be run at different fan speed according to T4. For different outdoor units,the fan speeds are different
T4
A+
A
B
C
D E
8.4.2.2 Indoor fan running rules
In cooling mode, indoor fan runs all the time and the speed can be selected as high, medium, low and auto. When the setting temp. is reached,if the compressor stop running,indoor fan motor will run in Minimum speed or setting speed. The indoor fan is controlled as below:
Setting fan
speed
Actual fan speed
H+(H+=H+G) A H=H B C
M+(M+=M+Z) D M(M=M) E F
L+(L+=L+D) G L(L=L) H I
T1-Td ℃(°F)
L
L-(L-=L-D)
H
H-H-=H-G)
M
M-(M-=M-Z)
The auto fan acts as below rules:
a
b
c
d
T1
e
8.4.2.3 Condenser temperature protection
T3
Resume
Off
Decrease
Hold
When condenser temperature temp. is more than setting value, the compressor will stop.
8.4.2.5 Evaporator temperature protection
When Evaporator temperature temp.is less than setting value, the compressor will stop
22
8.4.4 Auto-mode
This mode can be chosen with remote controller and the setting temperature can be changed between 17°C(62.6°F)~30°C(86°F). In auto mode, the machine will choose cooling, heating or fan-only mode according to ΔT (ΔT =T1-Ts).
T1-Ts
Cooling
Heating*
Fan only
Heating*: For cooling only models, they will run at fan speed Indoor fan will run at auto fan of the relevant mode. The louver operates same as in relevant mode. If the machine switches mode between heating and cooling, the compressor will keep stopping for certain time and then choose mode according to T1-Ts. If the setting temperature is modified, the machine will choose running function again.
8.4.5 Drying mode
8.4.5.1 Indoor fan speed is fixed at breeze and cant be changed. The louver angle is the same as in cooling mode.
8.4.5.3 Low indoor room temperature protection In drying mode, if room temperature is lower than 10°C(50°F), the compressor will stop and not resume until room temperature exceeds 12°C(53.6°F).
8.4.5.4 Evaporator anti-freezing protection, condenser high temperature protection and outdoor unit frequency limit are active and the same as that in cooling mode.
8.4.5.5 The outdoor fan operates the same as in cooling mode.
8.4.6 Forced operation function
8.4.6.1 Enter forced operation function: When the machine is off, pressing the touch button will carry the machine to forced auto mode. If pressing the button once again within 5 seconds, the machine will turn into forced cooling mode. In forced auto, forced cooling or any other operation mode, pressing touch button will turn off the machine.
8.4.6.2 In forced operation mode, all general protections and remote control are available.
8.4.6.3 Operation rules: Forced cooling mode: The compressor runs at F2 frequency and indoor fan runs as breeze. After running for 30 minutes. the machine will turn to auto mode as 24°C(75.2°F) setting temperature. Forced auto mode: The action of forced auto mode is the same as normal auto mode with 24°C(75.2°F) setting temperature.
8.4.7 Auto-Restart function
The indoor unit is equipped with auto-restart function, which is carried out through an auto-restart module. In case of a sudden power failure, the module memorizes the setting conditions before the power failure. The unit will resume the previous operation setting (not including swing function) automatically after 3 minutes when power returns. If the memorization condition is forced cooling mode, the unit will run in cooling mode for 30 minutes and turn to auto mode as 24°C(75.2°F) setting temp. If AC is off before power off and AC is required to start up now, the compressor will have 1 minute delay when power on. Other conditions, the compressor will have 3 minutes delay when restarts.
23
24
7.4.10 Point check function
Press the LED DISPLAY or LED or MUTE button of the remote controller three times, and then press the AIR DIRECTION or SWING button three times in ten seconds, the buzzer will keep ring for two seconds. The air conditioner will enter into the information enquiry status. You can press the LED DISPLAY or AIR DIRECTION button to check the next or front items information. When the AC enter the information enquiry status, it will display the code name in 2 seconds, the
details are as follows. Enquiry information Displaying code Meaning
T1 T1 T1 temp. T2 T2 T2 temp. T3 T3 T3 temp. T4 T4 T4 temp. T2B Tb T2B temp. TP TP TP temp. TH TH TH temp. Targeted Frequency FT Targeted Frequency Actual Frequency Fr Actual Frequency Indoor fan speed IF Indoor fan speed Outdoor fan speed OF Outdoor fan speed EXV opening angle LA EXV opening angle Compressor continuous running time CT Compressor continuous
running time
Causes of compressor stop. ST Causes of compressor
stop. Reserve A0 Reserve A1 Reserve 0 Reserve 1 Reserve 2 Reserve 3 Reserve 4 Reserve 5 Reserve 6 Reserve L Reserve A Reserve U Reserve T
When the AC enter into the information enquiry status, it will display the code value in the next 25s, the
details are as follows.
25
Enquiry information
Display value Meaning Remark
T1,T2,T3,T4, T2B,TP,TH, Targeted Frequency, Actual Frequency
-1F,-1E,-1d,-1c,­1b,-1A
-25,-24,-23,-22,-21,-20 1. All the displaying temperature is actual value.
2. All the temperature is °C no matter what kind of remote controller is used.
3. T1,T2,T3,T4,T2B display range:-25~70, TP display range:-20~130.
4. Frequency display range: 0~159HZ.
5. If the actual value exceeds the range, it
will display the maximum value or minimum
value.
-1999 -1999 A0,A1,A9 100,101,109 b0,b1,b9 110,111,119 c0,c1,c9 120,121,129 d0,d1,d9 130,131,139 E0,E1,E9 140,141,149 F0,F1,F9 150,151,159
Indoor fan speed /Outdoor fan speed
0 OFF 1,2,3,4 Low speed, Medium
speed, High speed, Turbo
For some big capacity motors.
14-FF Actual fan
speed=Display value turns to decimal value and then multiply 10. The unit is RPM.
For some small capacity motors, display value is from 14-FF(hexadecimal), the corresponding fan speed range is from 200-2550RPM.
EXV opening angle
0-FF Actual EXV opening
value=Display value turns to decimal value and then
multiply 2. Compressor continuous running time
0-FF 0-255 minutes If the actual value exceeds the
range, it will display the maximum
value or minimum value. Causes of compressor stop.
0-99 For the detailed
meaning, please consult with engineer
Decimal display
Reserve 0-FF
26
9. Troubleshooting
Safety
Electricity power is still kept in capacitors even the power supply is shut off. Do not forget to discharge the electricity power in capacitor.
Electrolytic Capacitors
(HIGH VOLTAGE! CAUTION!)
For other models, please connect discharge resistance (approx.100Ω 40W) or soldering iron (plug) between +, ­terminals of the electrolytic capacitor on the contrary side of the outdoor PCB.
Note: The picture above is only for reference. The plug of your side may be different.
27
9.1 Indoor Unit Error Display
Operation
lamp
Timer lamp Display LED STATUS
1 time
X E0 Indoor unit EEPROM parameter error
2 times
X E1 Indoor / outdoor units communication error
3 times
X E2 Zero-crossing signal detection error
4 times
X E3 Indoor fan speed has been out of control
5 times
X E4
Indoor room temperature sensor T1 open circuit or short circuit
6 times
X E5
Evaporator coil temperature sensor T2 open circuit or short circuit
7 times
X EC Refrigerant leakage detection
1 times
O F0 Overload current protection
2 times
O F1
Outdoor ambient temperature sensor T4 open circuit or short circuit
3 times
O F2
Condenser coil temperature sensor T3 open circuit or short circuit
4 times
O F3
Compressor discharge temperature sensor T5 open circuit or short circuit
5 times
O F4 Outdoor unit EEPROM parameter error
6 times
O F5 Outdoor fan speed has been out of control
1 times
P0 IPM malfunction or IGBT over-strong current protection
2 times
P1 Over voltage or over low voltage protection
3 times
P2
High temperature protection of compressor top diagnosis and solution
5 times
P4 Inverter compressor drive error
Olight X(off ☆(flash
28
9.2 Outdoor unit error display
MOB1-12CDN1-MP0W,
C24
C22
C20
C16
C15
C14
C13
C12
C11
C10
C3
C2
C1
IC8
+
-
~~
SSR1
E1
E4
E5
R59
R12
C27
E2
R78
E3
T1
C29
IC10
CN22
CN14 TestPort
C32 C34
C58
C61
C62
C63
C76
C77
C85
C89
C90
C91
C98
C100
C108
C113
C71C51
C148
CN28E2-Burning
CN29Simulation
D13
D14
E11
E13
E10
IC4-1
L3
R24
R25
R26
R27
R28
R60
R63
R82
R83
R84
R85
R86
R87
R88
R89
R90
R92
R94
R96
R97
R99
R101
R103
R105
R111
R118
R122
R129 R20
R48
R51
R49
R50
R145
R146
C37
C70
C80
R13
E16
R3
R37
R38
R79
R91
C8
C17
R40
R41
R1
C82 C83
IC9
IC4
D9
R54
CN9
Earth
LED2RED
U
V
W
T3-TipeT4-OutDoorTP
PFC-1310
202302130949 CE-KFR26W/BP2(MDY02+1243).D.13.WP2-1
[1.4]2014.02.20
HF
LF
IC2
IC6
PC851
IC5PC817
CN27
FAN_C
CN26 FAN_C
BR2
HS3
OCP1
COM1
HIN1
VB1
HS1
FO2
OCP2
FO1
LS1
U
LS2
V
LS3
W
VBB
VCC3
VB3
COM3
LIN3
OCP3
FO3
HS2
VB2
VCC2
HIN2
COM2
LIN2
VCC1
LIN1
HIN3
IPM1
BR1
PTC1
CN2
CN1
CN8
CN7
CN21
+
LED1 Yellow
C6
R33 R16
C23
C7
L1
RY1
D3
D1
E8
R67
R66R61
R57
R56
R53
R4
C9
CN19AC_FAN
D4
C28
C18
R77
D5
C54
R65
R64
R5
C52
ZR2
ZR1
RY5
RY4
RY3
RY2
R58
R55
R47
R46
R45
R44
R43
R42
R39
R36
R35
R32
R31
R30 R29
R21
R19
R18
R17
R15
R14
R11
R10
R9
R8
R7
R6
R2
Q1
IC7
IC1
FUSE1 T20A/250VAC
E17
E21
E15
E12E9
++
E6
DSA1
D7
D6
D2
C49
C42
C41
C40
C39
C38
C36
C35
C33
C31
C30
C26
C25
R23
CN42
CompTop
C21
C19
R34
C5
C45
C46
CN60
CN11
4-WAY-L
CN12
4-WAY-N
CN23
N-IN
CN24
L-IN
CN25
S
CN20
C4
R52
C43
C44
C81
R22
D8
X1
DZ1DZ4
DZ5
DZ2
IC3
C47
C48
DZ3
1
2
3
4
5
1235 46
LED1-Yellow
status light, by which you can judge the unit Normal or Error
(standby) Flashing once per second(low speed flashing) (error) Flashing once per half second (high speed flashing)
(running) aways on
29
MOC-18CDN1-MP0W
No. Problems
LED2 (Green)
LED1 (Red)
IU display
1 standby for normal O X 2 Operation normally X O 3 IPM malfunction or IGBT over-strong current protection
X P0 4 Over voltage or too low voltage protection O O P1 5 Over voltage or too low voltage protection O
P1
6 Inverter compressor drive error X
P4
7 Inverter compressor drive error
O P4 8 Inverter compressor drive error
P4
30
MOF1-22CDN1-MP5W
31
9.3 Diagnosis and Solution
9.3.1 EEPROM parameter error diagnosis and solution(E0/F4)
Error Code
E0/F4
Malfunction decision conditions
Indoor or outdoor PCB main chip does not receive feedback from EEPROM chip.
Supposed causes Installation mistake
PCB faulty
Trouble shooting:
Yes
Replace the indoor/outdoor
main PCB.
Power off, then restart the
unit 2 minuteslater.
EEPROM: a read-only memory whose contents can be erased and reprogrammed using a pulsed voltage. For the location of EEPROM chip, please refer to the below photos.
Indoor PCB
Outdoor PCB(18k model)
Note: The two photos above are only for reference, its may be not same totally with the ones on
your
side.
32
9.3.2 Indoor / outdoor units communication diagnosis and solution(E1)
Error Code
E1
Malfunction decision conditions
Indoor unit does not receive the feedback from outdoor unit during
110 seconds and this condition happens four times continuously.
Supposed causes Wiring mistake
Indoor or outdoor PCB faulty
Trouble shooting:
33
Remark:
Use a multimeter to test the DC voltage between L2 port and S port of outdoor unit. The red pin of multimeter connects with L2 port while the black pin is for S port.
When AC is normal running, the voltage will move alternately between -50V to 50V.
If the outdoor unit has malfunction, the voltage will move alternately with positive value.
While if the indoor unit has malfunction, the voltage will be a certain value.
Remark:
Use a multimeter to test the resistance of the reactor which does not connect with capacitor. The normal value should be around zero ohm. Otherwise, the reactor must have malfunction and need to be replaced.
34
9.2.3 Zero crossing detection error diagnosis and solutionE2
35
9.3.4 Fan speed has been out of control diagnosis and solution(E3)
Error Code
E3/F5
Malfunction decision conditions
When indoor fan speed keeps too low (300RPM) for certain time, the unit will stop and the LED will display the failure.
Supposed causes Wiring mistake
Fan assy faulty
Fan motor faulty
PCB faulty
Trouble shooting:
36
Index 1: 1:Indoor or Outdoor DC Fan Motor(control chip is in fan motor)
Power on and when the unit is in standby, measure the voltage of pin1-pin3, pin4-pin3 in fan motor connector. If the value of the voltage is not in the range showing in below table, the PCB must has problems and need to be replaced.
DC motor voltage input and output(voltage: 220-240V~)
NO. Color Signal
Voltage
1 Red Vs/Vm
280V~380V 2 --- --- --­3 Black GND 0V 4 White Vcc 14-17.5V 5 Yellow Vsp 0~5.6V 6 Blue FG 14-17.5V
DC motor voltage input and output(voltage :115V~)
NO. Color Signal
Voltage
1 Red Vs/Vm
140V~190V 2 --- --- --­3 Black GND 0V 4 White Vcc 14-17.5V 5 Yellow Vsp 0~5.6V 6 Blue FG 14-17.5V
2. Outdoor DC Fan Motor (control chip is in outdoor PCB) Power on ,and check if the fan can run normally, if the fan can run normally, the PCB must has problems and need to be replaced, If the fan cant run normally, measure the resistance of each two pins. If the resistance is not equal to each other, the fan motor must have problems and need to be replaced, otherwise the PCB must has problems and need to be replaced.
3. Indoor AC Fan Motor Power on and set the unit running in fan mode at high fan speed. After running for 15 seconds, measure the voltage of pin1 and pin2. If the value of the voltage is less than 100V(208~240V power
37
supply)or 50V(115V power supply), the PCB must has problems and need to be replaced.
38
9.3.5 Open circuit or short circuit of temperature sensor diagnosis and solution(E5)
Error Code
E4/E5/F1/F2/F3
Malfunction decision conditions
If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED will display the failure.
Supposed causes Wiring mistake
Sensor faulty
Trouble shooting:
39
9.3.6 Refrigerant Leakage Detection diagnosis and solution(EC)
Error Code
EC
Malfunction decision conditions
Define the evaporator coil temp.T2 of the compressor just starts running as Tcool. In the beginning 5 minutes after the compressor starts up, if T2 Tcool2°C(Tcool35.6°F) does not keep continuous 4 seconds and this situation happens 3 times, the display area will show EC and AC will turn off.
Supposed causes T2 sensor faulty
Indoor PCB faulty
System problems, such as leakage or blocking.
Trouble shooting:
40
9.3.7 Overload current protection diagnosis and solution(F0)
Error Code
F0
Malfunction decision conditions
An abnormal current rise is detected by checking the specified current detection circuit.
Supposed causes Power supply problems.
System blockage
PCB faulty
Wiring mistake
Compressor malfunction
41
9.3.8 IPM malfunction or IGBT over-strong current protection diagnosis and solution(P0)
Error Code
P0
Malfunction decision conditions
When the voltage signal that IPM send to compressor drive chip is abnormal, the display LED will show P0 and AC will turn off.
Supposed causes Wiring mistake
IPM malfunction
Outdoor fan assy faulty
Compressor malfunction
Outdoor PCB faulty
Trouble shooting:
42
For example:
P-U
P-V
Note: The photos below are only for reference, its may be not same totally with the ones on your
side.
43
P-W
N-U
44
N-V
N-W
45
9.3.9 Over voltage or too low voltage protection diagnosis and solution(P1)
Error Code
P1
Malfunction decision conditions
An abnormal voltage rise or drop is detected by checking the specified voltage detection circuit.
Supposed causes Power supply problems.
System leakage or block
PCB faulty
Trouble shooting:
Remark:
Measure the DC voltage between P and N port. The normal value should be around 310V.
P
N
46
9.3.10 High temperature protection of compressor top diagnosis and solution(P2)
Error Code
P2
Malfunction decision conditions
If the sampling voltage is not 5V, the LED will display the failure.
Supposed causes Power supply problems.
System leakage or block
PCB faulty
Trouble shooting:
47
9.3.11 Inverter compressor drive error diagnosis and solution(P4)
Error Code
P4
Malfunction decision conditions
An abnormal inverter compressor drive is detected by a special detection circuit, including communication signal detection, voltage detection, compressor rotation speed signal detection and so on.
Supposed causes Wiring mistake
IPM malfunction
Outdoor fan assy faulty
Compressor malfunction
Outdoor PCB faulty
Trouble shooting:
48
Main parts check
1. Temperature sensor checking
Disconnect the temperature sensor from PCB, measure the resistance value with a tester.
Temperature sensors. Room temp.(T1) sensor, Indoor coil temp.(T2) sensor, Outdoor coil temp.(T3) sensor, Outdoor ambient temp.(T4) sensor, Compressor discharge temp.(T5) sensor. Measure the resistance value of each winding by using the multi-meter.
49
Appendix 1 Temperature Sensor Resistance Value Table for T1,T2,T3,T4 (°C--K)
°C °F
K Ohm
°C °F
K Ohm
°C °F
K Ohm
°C °F
K Ohm
-20 -4 115.266 20 68 12.6431 60 140 2.35774 100 212 0.62973
-19 -2 108.146 21 70 12.0561 61 142 2.27249 101 214 0.61148
-18 0 101.517 22 72 11.5 62 144 2.19073 102 216 0.59386
-17 1 96.3423 23 73 10.9731 63 145 2.11241 103 217 0.57683
-16 3 89.5865 24 75 10.4736 64 147 2.03732 104 219 0.56038
-15 5 84.219 25 77 10 65 149 1.96532 105 221 0.54448
-14 7 79.311 26 79 9.55074 66 151 1.89627 106 223 0.52912
-13 9 74.536 27 81 9.12445 67 153 1.83003 107 225 0.51426
-12 10 70.1698 28 82 8.71983 68 154 1.76647 108 226 0.49989
-11 12 66.0898 29 84 8.33566 69 156 1.70547 109 228 0.486
-10 14 62.2756 30 86 7.97078 70 158 1.64691 110 230 0.47256
-9 16 58.7079 31 88 7.62411 71 160 1.59068 111 232 0.45957
-8 18 56.3694 32 90 7.29464 72 162 1.53668 112 234 0.44699
-7 19 52.2438 33 91 6.98142 73 163 1.48481 113 235 0.43482
-6 21 49.3161 34 93 6.68355 74 165 1.43498 114 237 0.42304
-5 23 46.5725 35 95 6.40021 75 167 1.38703 115 239 0.41164
-4 25 44 36 97 6.13059 76 169 1.34105 116 241 0.4006
-3 27 41.5878 37 99 5.87359 77 171 1.29078 117 243 0.38991
-2 28 39.8239 38 100 5.62961 78 172 1.25423 118 244 0.37956
-1 30 37.1988 39 102 5.39689 79 174 1.2133 119 246 0.36954 0 32 35.2024 40 104 5.17519 80 176 1.17393 120 248 0.35982 1 34 33.3269 41 106 4.96392 81 178 1.13604 121 250 0.35042 2 36 31.5635 42 108 4.76253 82 180 1.09958 122 252 0.3413 3 37 29.9058 43 109 4.5705 83 181 1.06448 123 253 0.33246 4 39 28.3459 44 111 4.38736 84 183 1.03069 124 255 0.3239 5 41 26.8778 45 113 4.21263 85 185 0.99815 125 257 0.31559 6 43 25.4954 46 115 4.04589 86 187 0.96681 126 259 0.30754 7 45 24.1932 47 117 3.88673 87 189 0.93662 127 261 0.29974 8 46 22.5662 48 118 3.73476 88 190 0.90753 128 262 0.29216 9 48 21.8094 49 120 3.58962 89 192 0.8795 129 264 0.28482
10 50 20.7184 50 122 3.45097 90 194 0.85248 130 266 0.2777 11 52 19.6891 51 124 3.31847 91 196 0.82643 131 268 0.27078 12 54 18.7177 52 126 3.19183 92 198 0.80132 132 270 0.26408 13 55 17.8005 53 127 3.07075 93 199 0.77709 133 271 0.25757 14 57 16.9341 54 129 2.95896 94 201 0.75373 134 273 0.25125 15 59 16.1156 55 131 2.84421 95 203 0.73119 135 275 0.24512 16 61 15.3418 56 133 2.73823 96 205 0.70944 136 277 0.23916 17 63 14.6181 57 135 2.63682 97 207 0.68844 137 279 0.23338 18 64 13.918 58 136 2.53973 98 208 0.66818 138 280 0.22776 19 66 13.2631 59 138 2.44677 99 210 0.64862 139 282 0.22231
50
Appendix 2 Temperature Sensor Resistance Value Table for T5 (°C --K)
°C °F
K Ohm
°C °F
K Ohm
°C °F
K Ohm
°C °F
K Ohm
-20 -4 542.7 20 68 68.66 60 140 13.59 100 212 3.702
-19 -2 511.9 21 70 65.62 61 142 13.11 101 214 3.595
-18 0 483 22 72 62.73 62 144 12.65 102 216 3.492
-17 1 455.9 23 73 59.98 63 145 12.21 103 217 3.392
-16 3 430.5 24 75 57.37 64 147 11.79 104 219 3.296
-15 5 406.7 25 77 54.89 65 149 11.38 105 221 3.203
-14 7 384.3 26 79 52.53 66 151 10.99 106 223 3.113
-13 9 363.3 27 81 50.28 67 153 10.61 107 225 3.025
-12 10 343.6 28 82 48.14 68 154 10.25 108 226 2.941
-11 12 325.1 29 84 46.11 69 156 9.902 109 228 2.86
-10 14 307.7 30 86 44.17 70 158 9.569 110 230 2.781
-9 16 291.3 31 88 42.33 71 160 9.248 111 232 2.704
-8 18 275.9 32 90 40.57 72 162 8.94 112 234 2.63
-7 19 261.4 33 91 38.89 73 163 8.643 113 235 2.559
-6 21 247.8 34 93 37.3 74 165 8.358 114 237 2.489
-5 23 234.9 35 95 35.78 75 167 8.084 115 239 2.422
-4 25 222.8 36 97 34.32 76 169 7.82 116 241 2.357
-3 27 211.4 37 99 32.94 77 171 7.566 117 243 2.294
-2 28 200.7 38 100 31.62 78 172 7.321 118 244 2.233
-1 30 190.5 39 102 30.36 79 174 7.086 119 246 2.174 0 32 180.9 40 104 29.15 80 176 6.859 120 248 2.117 1 34 171.9 41 106 28 81 178 6.641 121 250 2.061 2 36 163.3 42 108 26.9 82 180 6.43 122 252 2.007 3 37 155.2 43 109 25.86 83 181 6.228 123 253 1.955 4 39 147.6 44 111 24.85 84 183 6.033 124 255 1.905 5 41 140.4 45 113 23.89 85 185 5.844 125 257 1.856 6 43 133.5 46 115 22.89 86 187 5.663 126 259 1.808 7 45 127.1 47 117 22.1 87 189 5.488 127 261 1.762 8 46 121 48 118 21.26 88 190 5.32 128 262 1.717 9 48 115.2 49 120 20.46 89 192 5.157 129 264 1.674 10 50 109.8 50 122 19.69 90 194 5 130 266 1.632 11 52 104.6 51 124 18.96 91 196 4.849 12 54 99.69 52 126 18.26 92 198 4.703 13 55 95.05 53 127 17.58 93 199 4.562 14 57 90.66 54 129 16.94 94 201 4.426 15 59 86.49 55 131 16.32 95 203 4.294 16 61 82.54 56 133 15.73 96 205 4.167 17 63 78.79 57 135 15.16 97 207 4.045 18 64 75.24 58 136 14.62 98 208 3.927 19 66 71.86 59 138 14.09 99 210 3.812
51
Appendix 3:
°C °F °C °F °C °F °C °F °C °F
-5 23 21 69.8 51 123.8 82 179.6 113 235.4
-4 24.8 22 71.6 52 125.6 83 181.4 114 237.2
-3 26.6 23 73.4 53 127.4 84 183.2 115 239
-2 28.4 24 75.2 54 129.2 85 185 116 240.8
-1 30.2 25 77 55 131 86 186.8 117 242.6 0 32 25.5 77.9 56 132.8 87 188.6 118 244.4
0.5 32.9 26 78.8 57 134.6 88 190.4 119 246.2 1 33.8 27 80.6 58 136.4 89 192.2 120 248
1.5 34.7 28 82.4 59 138.2 90 194 121 249.8 2 35.6 29 84.2 60 140 91 195.8 122 251.6
2.5 36.5 30 86 61 141.8 92 197.6 123 253.4 3 37.4 31 87.8 62 143.6 93 199.4 124 255.2
3.5 38.3 32 89.6 63 145.4 94 201.2 125 257 4 39.2 33 91.4 64 147.2 95 203 126 258.8
4.5 40.1 34 93.2 65 149 96 204.8 127 260.6 5 41 35 95 66 150.8 97 206.6 128 262.4 6 42.8 36 96.8 67 152.6 98 208.4 129 264.2 7 44.6 37 98.6 68 154.4 99 210.2 130 266 8 46.4 38 100.4 69 156.2 100 212 131 267.8 9 48.2 39 102.2 70 158 101 213.8 132 269.6
10 50 40 104 71 159.8 102 215.6 133 271.4 11 51.8 41 105.8 72 161.6 103 217.4 134 273.2 12 53.6 42 107.6 73 163.4 104 219.2 135 275 13 55.4 43 109.4 74 165.2 105 221 136 276.8 14 57.2 44 111.2 75 167 106 222.8 137 278.6 15 59 45 113 76 168.8 107 224.6 138 280.4 16 60.8 46 114.8 77 170.6 108 226.4 139 282.2 17 62.6 47 116.6 78 172.4 109 228.2 140 284 18 64.4 48 118.4 79 174.2 110 230 141 285.8 19 66.2 49 120.2 80 176 111 231.8 142 287.6 20 68 50 122 81 177.8 112 233.6 143 289.4
52
2.Compressor checking
Measure the resistance value of each winding by using the tester.
Position Resistance Value ASN98D22UEZ ASM135D23UFZ DA150S1C-20FZ(F) Blue - Red
1.57Ω
(20℃/68℉)
1.75Ω
(20℃/68℉)
0.95Ω
(20℃/68℉)
Blue - Black Red - Blue
53
3. IPM continuity check
Turn off the power, let the large capacity electrolytic capacitors discharge completely, and dismount the IPM. Use a digital tester to measure the resistance between P and UVWN; UVW and N.
Digital tester Normal resistance value
Digital tester Normal resistance value
(+)Red (-)Black
(Several MΩ)
(+)Red (-)Black
(Several MΩ)
P
N U
N
U V V W
W (+)Red
4.Indoor AC Fan Motor Measure the resistance value of each winding by using the tester.
Position Resistance Value
RPG20E(YKFG-20-4-5) RPG28D(YKFG-28-4-1) RPG45C(YKFG-45-4-22)
Black - Red 388Ω±8% (20)
(Brand: Weiling)
260Ω±8% (20)
(Brand: Weiling)
168Ω±8% (20)
(Brand: Weiling)
White - Black
360Ω±8% (20)
(Brand: Weiling)
385Ω±8% (20)
(Brand: Weiling)
141Ω±8% (20)
(Brand: Weiling)
54
5: Pressure On Service Port
Cooling chart:
°F(°C)
O
DT
IDT
75
(23.89)
85
(29.44)
95
(35)
105
(40.56)
115
(46.11) BAR 70/59 8.2 7.8 8.1 8.6 10.1 BAR 75/63 8.6 8.3 8.7 9.1 10.7 BAR 80/67 9.3 8.9 9.1 9.6 11.2
°F(°C)
O
DT
IDT
75
(23.89)
85
(29.44)
95
(35)
105
(40.56)
115
(46.11) PSI 70/59 119 113 117 125 147 PSI 75/63 124 120 126 132 155 PSI 80/67 135 129 132 140 162
°F(°C)
O
DT
IDT
75
(23.89)
85
(29.44)
95
(35)
105
(40.56)
115
(46.11) MPA 70/59 0.82 0.78 0.81 0.86 1.01 MPA 75/63 0.86 0.83 0.87 0.91 1.07 MPA 80/67 0.93 0.89 0.91 0.96 1.12
0.0
2.0
4.0
6.0
8.0
10.0
12.0
75 23.8985 29.44 95 35 105 40.56115 46.11
70/59 75/63 80/67
55
Heating Chart:
°F
(°C)
O
DT
IDT
57/53
(13.89/11.67)
47/43
(8.33/6.11)
37/33
(2.78/0.56)
27/23
(-2.78/-5)
17/13
(-8.33/-10.56) BAR 55 30.3 28.5 25.3 22.8 20.8 BAR 65 32.5 30.0 26.6 25.4 23.3 BAR 75 33.8 31.5 27.8 26.3 24.9
°F
(°C)
ODT
IDT
57/53
(13.89/11.67)
47/43
(8.33/6.11)
37/33
(2.78/0.56)
27/23
(-2.78/-5)
17/13
(-8.33/-10.56) PSI 55 439 413 367 330 302 PSI 65 471 435 386 368 339 PSI 75 489 457 403 381 362
°F
(°C)
O
DT
IDT
57/53
(13.89/11.67)
47/43
(8.33/6.11)
37/33
(2.78/0.56)
27/23
(-2.78/-5)
17/13
(-8.33/-10.56)
MPA
55 3.03 2.85 2.53 2.28 2.08
MPA
65 3.25 3.00 2.66 2.54 2.33
MPA
75 3.38 3.15 2.78 2.63 2.49
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
40.0
57/53
(13.89/11.67)
47/43
(8.33/6.11)
37/33
(2.78/0.56)
27/23
(-2.78/-5)
17/13
(-8.33/-10.56)
55 65 75
56
10 Disassembly Instructions
Note: This part is for reference, the photos may have slight difference with your machine.
10.1 Indoor unit
No. Parts name Procedures Remarks
1 Front panel
How to remove the front panel.
1) Pull the below side of the panel toward you and remove the cover
2) Release the connector of
the display assy.
3) Release the two clips and
then remove the panel.
4) Remove the filter and the
horizontal louver.
5) Remove the two screws
and then remove the panel assy.
57
2 Electrical
parts
How to remove the electrical parts.
1) Remove the front panel from procedure 1.
2) Pull out the room temp. sensor (T1). Remove the two screws for the ground connection.
3) Remove the fixing screw.
4) Pull out the coil temp.
sensor.
5) From the side direction,
open the electronic control box cover fixing by clips. Pull out the fan motor connector and swing motor connector. Then remove the electronic control box.
58
3 Evaporator
How to remove the evaporator.
1) After remove the electrical parts from procedure 2, disassemble the pipe holder at the rear side of the unit. .
2) Remove the screws on the evaporator at the fixed plate.
3) Remove the two screws on the evaporator at the base bearing side.
4) Then pull out the evaporator.
59
4 Fan motor
and Fan
How to remove the fan motor.
1) Remove the front panel, electrical parts and evaporator following procedure 1-3.
2) Remove the two screws
and remove the fixing board of fan motor.
3) Remove the fixing screw .
4) Pull out the fan motor and
fan assy from the side direction.
60
10.2 Outdoor unit
Ø MOB1-12CDN1-MP0W
No. Part name Procedures Remarks
1 Panel plate
How to remove the panel plate.
1) Stop operation of the air conditioner and turn OFF the power breaker.
2) Remove the top cover.(8 screws)
3) Remove the front panel.(10 screws)
4) Remove the side panel.(11 screws)
2 Fan assy
How to remove the fan assy.
1) Remove the panel plate from procedure 1
2) Remove the hex nut fixing the fan.
3) Remove the fan.
4) Disconnect the connector for fan motor from the electronic control board.
5) Remove the fixing screws.(4 pcs)
6) Remove the fan motor.
4screws
Side panel
Front panel
Top cover
61
3 Electrical
parts
How to remove the electrical parts.
1) Perform work of item 1,2.
2) Remove the wires connected with the compressor. (On the IPM )
3) Remove the wires connected with 4-way valve.
4) Remove the red wire connected with the capacitor Remove the blue wire connected with the reactor.
5) Remove the temp. sensor connectors. Remove the ground wire of the compressor
6) Remove the two fixing screws
7) Remove the electronic control box.
4 Compressor
How to remove the
Two blue wires
62
compressor.
1) Perform work of item 1,2,3.
2) Remove ground wire and remove the discharge pipe and suction pipe with a burner.
3) Remove the nuts and washers fixing the compressor on bottom plate.
4) Lift the compressor from the base pan assembly.
63
Ø MOC-18CDN1-MP0W
No. Part name Procedures Remarks
1 Panel plate
How to remove the panel plate.
1) Stop operation of the air conditioner and turn OFF the power breaker.
2) Remove the top cover.(6 screws)
3) Remove the front panel.(10 screws)
4) Remove the side panel.(10 screws)
2 Fan assy
How to remove the fan assy.
1) Remove the panel plate from procedure 1
2) Remove the hex nut fixing the fan.
3) Remove the fan.
4) Disconnect the connector for fan motor from the electronic control board.
5) Remove the fixing screws.(4 pcs)
6) Remove the fan motor.
3 Electrical
parts
How to remove the electrical
4 screws
64
parts.
1) Perform work of item 1,2.
2) Remove the two connectors for the compressor and the reactors.
3) Remove two blue wires connected with the four way valve.
4) Remove the connectors for the condenser coil temp. sensor(T3),outdoor ambient temp. sensor(T4) and discharge temp. sensor(T5). (two black connectors, one white connector)
5) Remove the ground wires .
6) Remove the fixing screws.
7) Remove the electronic control box.
4 Compressor
How to remove the compressor.
T3,T4,T5
two screws
65
1) Perform work of item 1,2,3.
2) Remove the ground wire and remove the discharge pipe and suction pipe with a burner.
3) Remove the hex nuts and washers fixing the compressor on bottom plate.
4) Lift the compressor
from the base pan assembly.
66
Ø MOF1-22CDN1-MP5W
No.
Parts name Procedures
Remarks
1
Panel plate How to remove the panel plate.
1) Stop operation of the air conditioner and turn OFF the power breaker.
2) Remove the top cover.(9 screws)
3) Remove the front panel.(2 screws)
4) Remove the side panel.(10 screws)
5) Remove the air outlet panel.(9 screws)
2
Fan assy How to remove the fan assy.
1) Remove the panel plate from procedure 1.
2) Remove the hex nut fixing the fan.
3) Remove the fan.
4) Disconnect the connectors for fan motor from the electronic control board. (There are blue wire, red wire and black wire. The blue wire and red wire are on the capacitor. The black wire is connected with terminal four.)
5) Remove the fixing screws.(3 pcs)
Side panel
Air outlet panel
Front panel
Top cover
3 pcs wires.
67
6) Remove the fan motor.
3
Electrical parts
How to remove the electrical parts.
1) Perform work of item 1,2.
2) Remove the screw on the middle metal plate.
3) Remove the wires connected with the compressor.(Red wire connects with terminal one, the blue wire and white wire connect with the compressor capacitor)
4) Remove the wires connected with the 4-way valve.
5) Remove the electrical parts.
3 screws
3 pcs wires.
68
4
Compressor How to remove the
compressor.
1) Perform work of item 1,2,3.
2) Remove the ground wire and remove the discharge pipe and suction pipe with a burner.
3) Remove the nuts and washers fixing the compressor on bottom plate.
4) Lift the compressor from the base pan assembly.
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