Johnson Controls YJHJXH024BARR-FX User manual

SERVICE MANUAL
Order No.
EK&EM-Series
Model No.
YJHJYH024BARRA-X
This service information is designed for experienced repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or
repair the product or products dealt with in this service information by anyone else could result in serious injury or death
WARNING
Wall mounted Type
DC Inverter
YJHJXH024BARR-FX
indoor unit and remote controller
outdoor unit

YJHJZH024BARRAFX-SM
1. Introduction............................................................................................. 1
2. List of Functions...................................................................................... 6
3. Specifications........................................................................................... 7
4. Printed Circuit Board Connector Wiring Diagram................................. 9
5. Functions and Control.............................................................................14
5.1 Main functions and control specifications of indoor nit.............................14
5.2 The control system of outdoor unit......................................................... 21
5.3 Value of thermistor................................................................................... 29
6. System Configuration.............................................................................. 41
6.1 System Configuration.............................................................................. 41
6.2 Instruction................................................................................................ 41
7. Error Codes and Description................................................................. 62
8. Installations............................................................................................. 77
9. Removal Procedure................................................................................. 92
9.1 Removal of Front panel........................................................................... 92
9.2 Removal of Air Filter.................................................................................93
9.3 Removal of Horiaontal Blade and Front Grill..............................................94
9.4 Removal of Drain pan.............................................................................. 96
9.5 Removal of Vertical Blades and Swing Motor............................................ 98
9.6 Removal of Electrical Box........................................................................ 99
9.7 Removal of Heat Exchanger................................................................... 100
9.8 Removal of Fan Rotor and Fan Motor..................................................... 101

YJHJZH024BARRAFX-SM
9.9 Removal of Outdoor panel.................................................................... 102
9.10 Removal of Electrcal Box.................................................................... 104
9.11 Removal of the Side panel.................................................................. 105
9.12 Removal of Fan Motor......................................................................... 107
9.13 Removal of Compressor and Heat Exchanger.................................... 111
10. Wiring Diagrams................................................................................... 115
10.1 Indoor Unit........................................................................................... 115
10.2 Outdoor Unit........................................................................................ 116
11. Cicuit Diagrams.................................................................................... 117
12. Description of Coding Rules of Unit Model....................................... 120

Introduction
Domestic Air Conditioner
1. Introduction
1.1 Safety Cautions
Be sure to read the following safety cautions before conducting repair work.
The caution items are classified into “Warning” and “Caution”. The “Warning” items are especially important
since they can lead to death or serious injury if they are not followed closely. The “Caution” items can also lead
to serious accidents under some conditions if they are not followed. Therefore, be sure to observe all the safety
caution items described below.
About the pictograms
This symbol indicates an item for which caution must be exercised.
The pictogram shows the item to which attention must be paid.
This symbol indicates a prohibited action.
The prohibited item or action is shown inside or near the symbol.
This symbol indicates an action that must be taken, or an instruction.
The instruction is shown inside or near the symbol.
After the repair work is complete, be sure to conduct a test operation to ensure that the equipment operates
normally, and explain the cautions for operating the product to the customer.
1.1.1 Caution in Repair
Warning
Be sure to disconnect the power cable plug from the plug socket before disassembling the equipment for
arepair.
Working on the equipment that is connected to a power supply can cause an electrical shook.
If it is necessary to supply power to the equipment to conduct the repair or inspecting the circuits, do not
touch any electrically charged sections of the equipment.
If the refrigerant gas discharges during the repair work, do not touch the discharging refrigerant gas.The
refrigerant gas can cause frostbite.
When disconnecting the suction or discharge pipe of the compressor at the welded section, release the
refrigerant gas completely at a well-ventilated place first.
If there is a gas remaining inside the compressor, the refrigerant gas or refrigerating machine oil
discharges when the pipe is disconnected, and it can cause injury.
If the refrigerant gas leaks during the repair work, ventilate the area. The refrigerant gas can generate
toxic gases when it contacts flames.
The step-up capacitor supplies high-voltage electricity to the electrical components of the outdoor unit.
Be sure to discharge the capacitor completely before conducting repair work.A charged capacitor can
cause an electrical shock.
Do not start or stop the air conditioner operation by plugging or unplugging the power cable plug.
Plugging or unplugging the power cable plug to operate the equipment can cause an electrical shock or
fire.
YJHJZH024BARRAFX-SM

Introduction
Domestic Air Conditioner
Warning
Do not repair the electrical components with wet hands. Working on the equipment with wet hands can
cause an electrical shock.
Do not clean the air conditioner by splashing water. Washing the unit with water can cause an electrical
shock.
Be sure to provide the grounding when repairing the equipment in a humid or wet place, to avoid electrical
shocks.
Be sure to turn off the power switch and unplug the power cable when cleaning the equipment. The
internal fan rotates at a high speed, and cause injury.
Do not tilt the unit when removing it. The water inside the unit can spill and wet the furniture and floor.
Be sure to check that the refrigerating cycle section has cooled down sufficiently before conducting repair
work. Working on the unit when the refrigerating cycle section is hot can cause burns.
Use the welder in a well-ventilated place. Using the welder in an enclosed room can cause oxygen
deficiency.
1.1.2 Cautions Regarding Products after Repair
Warning
Be sure to use parts listed in the service parts list of the applicable model and appropriate tools to
conduct repair work. Never attempt to modify the equipment. The use of inappropriate parts or tools can
cause an electrical shock, excessive heat generation or fire.
When relocating the equipment, make sure that the new installation site has sufficient strength to
withstand the weight of the equipment.
If the installation site does not have sufficient strength and if the installation work is not conducted
securely, the equipment can fall and cause injury.
Be sure to install the product correctly by using the provided standard installation frame.
Incorrect use of the installation frame and improper installation can cause the equipment to fall, resulting
in injury.
For
integral
units only
Be sure to install the product securely in the installation frame mounted on a window frame.
If the unit is not securely mounted, it can fall and cause injury.
For
integral
units only
2
YJHJZH024BARRAFX-SM

Introduction
Domestic Air Conditioner
Warning
Be sure to use an exclusive power circuit for the equipment, and follow the technical standards related to
the electrical equipment, the internal wiring regulations and the instruction manual for installation when
conducting electrical work.
Insufficient power circuit capacity and improper electrical work can cause an electrical shock or fire.
Be sure to use the specified cable to connect between the indoor and outdoor units. Make the
connections securely and route the cable properly so that there is no force pulling the cable at the
connection terminals.
Improper connections can cause excessive heat generation or fire.
When connecting the cable between the indoor and outdoor units, make sure that the terminal cover does
not lift off or dismount because of the cable.
If the cover is not mounted properly, the terminal connection section can cause an electrical shock,
excessive heat generation or fire.
Do not damage or modify the power cable.
Damaged or modified power cable can cause an electrical shock or fire. Placing heavy items on the
power cable, and heating or pulling the power cable can damage the cable.
Do not mix air or gas other than the specified refrigerant (R-410A / R22) in the refrigerant system.
If air enters the refrigerating system, an excessively high pressure results, causing equipment damage
and injury.
If the refrigerant gas leaks, be sure to locate the leak and repair it before charging the refrigerant. After
charging refrigerant, make sure that there is no refrigerant leak.
If the leak cannot be located and the repair work must be stopped, be sure to perform pump-down and
close the service valve, to prevent the refrigerant gas from leaking into the room. The refrigerant gas itself
is harmless, but it can generate toxic gases when it contacts flames, such as fan and other heaters,
stoves and ranges.
When replacing the coin battery in the remote controller, be sure to disposed of the old battery to prevent
children from swallowing it.
If a child swallows the coin battery, see a doctor immediately.
3
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Introduction
Domestic Air Conditioner
1.1.3 Inspection after Repair
Warning
Check to make sure that the power cable plug is not dirty or loose, then insert the plug into a power outlet
all the way.
If the plug has dust or loose connection, it can cause an electrical shock or fire.
If the power cable and lead wires have scratches or deteriorated, be sure to replace them.
Damaged cable and wires can cause an electrical shock, excessive heat generation or fire.
Warning
Do not use a joined power cable or extension cable, or share the same power outlet with other electrical
appliances, since it can cause an electrical shock, excessive heat generation or fire.
Caution
Installation of a leakage breaker is necessary in some cases depending on the conditions of the
installation site, to prevent electrical shocks.
Do not install the equipment in a place where there is a possibility of combustible gas leaks.
If a combustible gas leaks and remains around the unit, it can cause a fire.
Be sure to install the packing and seal on the installation frame properly. If the packing and seal are not
installed properly, water can enter the room and wet the furniture and floor.
For
integral
units only
4
YJHJZH024BARRAFX-SM

Introduction
Domestic Air Conditioner
Caution
Check to see if the parts and wires are mounted and connected properly, and if the connections at the
soldered or crimped terminals are secure. Improper installation and connections can cause excessive
heat generation, fire or an electrical shock.
If the installation platform or frame has corroded, replace it. Corroded installation platform or frame can
cause the unit to fall, resulting in injury.
Check the grounding, and repair it if the equipment is not properly grounded. Improper grounding can
cause an electrical shock.
Be sure to measure the insulation resistance after the repair, and make sure that the resistance is 1 M
ohm or higher.
Faulty insulation can cause an electrical shock.
Be sure to check the drainage of the indoor unit after the repair.
Faulty drainage can cause the water to enter the room and wet the furniture and floor.
5
YJHJZH024BARRAFX-SM

Category
Healthy negative ion Y
Child lock Y
3D air flow N
24Hour timer Y
Y
Easy clean design
Intelligent air Y
Anti-mold filter Y
4 Fan setting Y
Auto mode Y
Power mode
Soft mode Y
Note: Y: Holding Functions
N : No Functions
make your room full of an abundance natural negative ions.
Functions
Quick cooling or heating
Y
adjust the last fixed operation mode automatically.
Make dehumidifying in the room while keeping the constant temperature inside
lower noise operation condition
Slect the fan speed LO,MED,HI,AUTO
N
Constant temperature
dehumidification
Avoid the child's wrong operation on the remote controller
Sleep mode
Catches most small particles and remove unpleasant odors effectively.
With twin-blade technology ,the airflow can be adjusted not to blow directly
The 3D airflow is able to deliver the airflow horizontally and vertically.
Use the timer function to set on,or off,or from on to off,or from off to on
The panel is easy to wash and the airflow vents can be detached easily
The setting temprature and the indoor noise can be adjusted to a more comfortable
level when you set the "sleep mode"during night sleep
Y
AS24GS1/2ERA 1U24GS1ERA
YJHJZH024BARRAFX-SM

23900(7850-24900)
23200(7500-23900)
2120(600~2150) 1970(595~2000)
3.21 3.6
16.7
14.6
12.5
17.3
15.4
13.5
----
0.15 0.15 0.15 0.15
33 33 33 33
50/47/45
60
7.10(2.3~7.3)
13.0.
16.5
13.0.
16.5
44
6.80(2.2~7.0)
5848(1892-6020)
7
9.5 9.1
2.6
25
10
15
20
25
10
15
20
1126X344X388
3 Specification
6536(1032~8170)
15.88 15.88
1046X234X299
1126X344X388
1046X230X299
AS24GS1ERA AS24GS2ERA
94
97
9.52
16.7
14.6
12.5
17.3
15.4
13.5
9.52
φ
3.21 3.6
94
97
23900(7850-24900)
23200(7500-23900)
2120(600~2150) 1970(595~2000)
7.10(2.3~7.3)
6.80(2.2~7.0)
5848(1892-6020)
9.5 9.1
2.6
6536(1032~8170)
50/47/45
60
YJHJZH024BARRAFX-SM

0.50
R410a
1.60
51.7
1823.8
51.7
1823.8
52.2
48.2
60
860x308x730
995X420X815
2120 1970
9.5 9.1
60
27
35
70 70
SNB130FGYM2
900
FV50S
5
YJHJZH024BARRAFX-SM

Connector Wiring Diagram
Domestic Air Conditioner
9
4.Printed Circuit Board Connector Wiring Diagram
4.1˖Indoor unit Connectors
&RQQHFWRUV           
3&%&RQWURO3&%)RU+80+&5'%
1) CN26 Connector for fan motor
2) CN1 Connector for heat exchanger thermistor and Room temperature thermistor
3) CN11 Connector for UP&DOWN STEP motor
4) CON2 Connector for power N wire
5) CON1 Connector for power L
6) CN32 Connector for display board
7) C0N6,C0N8 Connector for ions generator
8) CON7 Connector for communicate between the indoor board and the outdoor
board
9) CON9 Connector for new airflow wire
10) CN34 Connector for long-range control
11) CN20 Connector for room card
1RWH 2WKHUGHVLJQDWLRQV
PCB(1) (INdoor Control PCB)
1) SW1 Connector for Forced operation ON / OFF switch
2) SW2 1 Select remote code A or B,2 Select 25 or 35 ,3 Select room card able or
disable
3) SW4 Select 20 or other,if select 20,SW2 must select 25(Select ON)
4)RV1 Varistor
5) FUSE1 Fuse 3.15A/250VAC
YJHJZH024BARRAFX-SM

Connector Wiring Diagram
Domestic Air Conditioner
10
3&%
CN26 CN1 SW1
CON1
CN11
CON6
CON6
CON7
CN32
CON2
CON9
CN34
CN20
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Connector Wiring Diagram
Domestic Air Conditioner
11
4.2: outdoor unit
&RQQHFWRUV
3&%&RQWURO3&%
1) CN1,CN2 Connector for power N and L
2) CN3 Connector for ground
3) CN6 CN7 Connector for terminal to indoor unit
4) CN25 Connector for DC POWER 15Vand 5V to the module board
5) CN9,CN10 Connector for CN2,CN1 on the module board
6) CN12 Connector for AC fan motor
7) CN11 Connector for four way valve coil
8) CN17,CN18,CN19, CN47 Connector for thermistors
9) CN24 Connector for communicate between the control board and the module board
10) CN25 CN28 Connector to P and N of the module board
11) CN36 Connector for communicate between indoor and outdoor unit
12) CN15 Connector for electric expansion valves
13) CN45 Connector for terminal socket protect
14) CN22 Connector for DC fan motor

3&%PRGXOH3&%
CN10 Connector for the DC power 5V and 15V form the control PCB
CN11 Connector for communicate between the control board and the module board
P( CN8), N(CN9) Connector for capacitance board
LI (CN3),LO(CN4) Connector for reactor
CN5ˈCN6ˈCN7 Connector for the U, V, W wire of the compressor
1RWH: Other Designations
PCB(1) (Control PCB)
1) FUSE 1, (25A,250VAC) FUSE 2(1A,250VAC)
2)LED 1 keep light representative normal ,if keep flash interval representative trouble Alarm
3)RV1,RV2,RV3 Varistor
YJHJZH024BARRAFX-SM

Connector Wiring Diagram
Domestic Air Conditioner
12
3&%


CN2
CN1
CN23
CN8
CN10
CN12
CN11
CN21
CN20
CN19
CN18
CN22CN25CN28
CN45
CN17
CN7 CN6
CN47
CN16
CN15
CN4
CN36
CN22
YJHJZH024BARRAFX-SM

Connector Wiring Diagram
Domestic Air Conditioner
13
3&%
CN5CN7
CN6
CN11
CN2 CN1 CN4 CN3
CN9 CN8
CN10
YJHJZH024BARRAFX-SM

Function and Control
Domestic Air Conditioner
14
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5.1 Main functions and control specification of indoor unit
5.1.1 Automatic operation
When the running mode is turned to automation after starting the system, the system will first
determine the running mode according to the current room temperature and then will run according to
the determined mode. Tr in the following selection conditions means room temperature, Ts means
setting temperature, Tp means temperature of indoor coil pipe
Tr≥23 ChooseCoolingModeć
Tr˘23 Choose Heating Modeć
After turning to the automation mode, the running mode can be switched between cooling mode, fan
mode and heating mode according to the change of the indoor ambient temperature. But the
automatic conversion between cooling mode and heating mode must be conducted after 15 minutes.
5.1.2 Cooling operation mode
Temperature control range: 16ć---30ć
Temperature difference: r1ć
* Control features: When Tr˄input airflow˅>Ts˄set temperature˅, the compressor will be opened,theć
indoor fan will operate at the set speed and the mode signal will be sent to the outdoor system. When
Tr˄input airflow˅Ts˄set temperature˅, the compressor will be opened,the indoor fan will operateć
at the set speed and the mode signal will be sent to the outdoor system. The system will keep the
original status if Tr= Ts.
Airflow speed control: (temperature difference 1 )ć
Automatic: When Tr>=Ts+3 , high speed.ć
When Ts+1 =<Tr<Ts+3 , medium speedćć
When Tr<Ts+1 , low speedć
When the sensor is off, low speed
When the airflow speed has no delay from the high to low switching, the speed should be delayed for
3 minutes (remain at high speed for 3 minutes.) before the next switch.
Manus: When the system is operating, you can set the high, medium or low speed manually. ( When
the sensor is on or off, the system will change the speed 2 seconds after receiving the signal.)
*Airgate location control: the location for the airgate can be set according to your needs.
*Defrosting function: preventing the frosting on the indoor heat exchanger (when cooling or
demoisture). When the compressor works continuously for 1/6 minutes (adaptable in EEPROM) and
the temperature of the indoor coils has been below zero centigrade for 10 seconds, the compressor
will be stopped and the malfunction will be recorded in the malfunction list. The indoor system will
continue to run. When the temperature of the indoor coil is raised to 7 , the compressor will beć
restarted again (the prerequirement of 3 minutes’ delay should be satisfied.)
* timing system on/off function.
* Dormant control function.
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Function and Control
Domestic Air Conditioner
15
5.1.3 Demoisture mode.
* temperature control range: 16---30ć
* temperature difference: r1ć
Control feature: send the demoisture signal to the outdoor system.
When Tr>Ts+2 , the compressor will be turned on, the indoor fan will operaćte at the set speed.
When Tr is between the Ts and Ts+2 , the outdoor system will operate at the high demoistureć
frequency for 10 minutes and then at the low demoisture mode for six minutes. The indoor fan
will operate at low speed.
When Tr< Ts, the outsystem will be stopped, the indoor fan will be stopped for 3 minutes and then
turned to the low speed option.
All the frequency converses have a ±1 difference.ć
* Wind speed control: Automatic:
When Tr >= Ts+ 5 , high speed.ć
When Ts+3ćdTr< Ts+5 , medium spćeed.
When Ts+2ćdTr< Ts+3 , low speed.ć
When Tr<Ts+2 , light speed.ć
If the outdoor fan stopped, the indoor fan will be paused for 3 minutes.
If the outdoor fan stopped for more than 3 minutes and the outdoor system still operates, the
system will be changed into light speed mode.
When the airflow speed has no delay from the high to low switching, the speed should be
delayed for 3 minutes (remain at high speed for 3 minutes.) before the next switch.
Manual: When the sensor is off or Tr< Ts+3 , the manual operaćtion can not be made. (obligatory
automatic operation.)
*Airgate location control: the location for the airgate can be set according to your needs.
*Defrosting function: preventing the frosting on the indoor heat exchanger (when cooling or
demoisture). When the compressor works continuously for 1/6 minutes (adaptable in EEPROM)
and the temperature of the indoor coils has been below zero centigrade for 10 seconds, the
compressor will be stopped and the malfunction will be recorded in the malfunction list. The
indoor system will continue to run. When the temperature of the indoor coil is raised to 7 , theć
compressor will be restarted again (the prerequirement of 3 minutes’ delay should be satisfied.)
* coil protection (synchronic overheating protection) are installed for the four directions latch
malfunctions when demoisturing.
* timing system on/off function.
* Dormant control function.
5.1.4 Heating operation mode.
* temperature control range: 16---30ć
* temperature difference: r1ć
* control feature: the temperature compensation is automatically added and the system will send the
heating signals to the outdoor system.
If TrdTs, the outdoor compressor is turned on, the indoor fan will be at the cold air proof mode.
If Tr>Ts+3, the outdoor system is turned off, the indoor fan will be at the heat residue sending mode.
If Tr<Ts+3ˈthe outdoor system will be turned on again, the indoor fan will be at the cold air proof
YJHJZH024BARRAFX-SM

Function and Control
Domestic Air Conditioner
16
mode.
*Indoor fan control
manual control: You can choose high, medium, low and automatic speed control.
Automatic: When Tr<Ts, high speed.
When Ts=<Tr=<Ts+2 , medium speed.ć
When Tr> Ts+2 , low speed.ć
When the airflow speed has no delay from the high to low switching, the speed should be delayed for
3 minutes (remain at high speed for 3 minutes.) before the next switch.
*Airgate location control: the location for the airgate can be set according to your needs.
Coldair proof operation
1. The indoor operation within 4 minutes after the start up is as the following diagram, the air speed
can be raised only after the speed has reached a certain level.
2. 4 minutes after the start up of the indoor fan, the light airflow and the low airflow will be turned to the
set speed airflow.
3. In the cold air proof operation, the fan won’t stop after the start up.
4. During the cold air proof operation, the indoor system will continuously send ‘indoor high speed’
signals to the outdoor system.
* Residue heat sending. The indoor fan will send the residue heat at a low speed for 20 seconds.
If other conditions are satisified, when the compressor stops, the indoor system will operate at a light
speed. The indoor fan will stop when the coil temperature is below the ‘heat start temp 4’.
* Defrosting. When the system receives the defrosting signal from outdoors, the indoor fan will stop
and the indoor temperature display won’t change. At the time, any indoor coil malfunctions will be
neglected. When the outdoor defrosting finishes, the coil malfunction will still be neglected until the
compressor has been started up for 30 seconds. The indoor temperature display will not change and
the system operates at the cold air proof mode.
* Automatic heating temperature compensation: when the system enters the heating mode, the
temperature compensation (4) will be added. When the status is switched off, the compensation will
be erased.
5.1.5 strength operation
a. the system enters the mode after receiving the ‘strength signal’.
Send strength operation signal to the outdoor system.
Strength operation quit if you change the fan mode or operation mode .
The mode change finishes the strength operation.
Heat start temp 1
Heat start temp 2
Heat start temp 3
Heat start temp 4
Set speed
Low speed
Light speed
Fan/off
Fan/off
Keep the
high speed.
The fan
doesn’t sto
p
YJHJZH024BARRAFX-SM

Function and Control
Domestic Air Conditioner
17
Entering ‘mute’, you can have normal operation or signal control such as timing to finish the strength
operation.
When the system is at the automatic option ,There is no strength/ mute function,.
5.1.6 Mute operation
the system enters the mode after receiving the ‘mute signal’.
a. Mute heating: the airflow speed is slight, the system sends the mute signal to the outdoor system.
b. mute cooling: the airflow speed is slight, the system sends the mute signal to the outdoor system.
When the compressor operates, the airflow speed is mute speed. EEPROM is adaptable.
Mute operation can not work under the demoisturing and airflow-sending operation.
5.1.7 Air refreshing
After receiving the signal from the remote control,(HV series: the background light of the ‘health’ logo
is green. HS series: the ‘health’indicator will be lighted). If the fan operates, the negative ion generator
operates to realize the negative sending function.
If the indoor fan stops, the negative ion generator is turned off.
When the negative ion generator is turned off, if the air refreshing system is turned on, the negative
ion generator will be turned on when the fan operates.
5.1.8 Timing.
You can set 24 hours’ on/off timing accordingly. After the setting, the timing indicator will be lightened.
Also, the light will be turning off after the timing is finished. The followings are several timing methods.
V\VWHPRQWLPLQJ The timing indicator will be lightened and the indoor system is under the waiting
mode. The light will be turned off when the timing is finished and the rest of the system will operate
under a normal condition. The timing starts since the last reception of the timing singal. You can have
the dormacy setting under the timing mode, the order of your settings will be operated according to
the timing settings.
V\VWHPRIIWLPLQJ When the system is turned on, the timing indicator is lightened, the rest of the
system will operated under a normal condition. When set time comes, the indicator light will be turned
off and the system will be turned off. If you have set the dormant functions, the order of your settings
will be operated according to the timing settings.
V\VWHPRQDQGRIIWLPLQJ The settings will be completed according to the orders.
5.1.9 Dormant operation
The dormant timing is an eight hours unadaptable one. The timing signs are shown on the E series
board. (RC series show the dormant signal, the timing light is lighted on the 6 lights board).
2.1 Under the cooling/ demoisture operation, after the setting of the dormant operation, the set
YJHJZH024BARRAFX-SM