Download Single Packaged Air Conditioner SERVICE MANUAL

Single Packaged
Air Conditioner
SERVICE MANUAL
MODEL: EK-H2408C00
Air Conditioner Service Manual
TABLE OF CONTENTS
Safety Precautions ............................................................................................................................3
Model Number Nomenclature ................................................................................................. 8
General Data ............................................................................................................................. 9
Dimensions ............................................................................................................................. 10
Refrigerant Circuit diagram....................................................................................................11
Wiring Diagram....................................................................................................................... 12
Trouble Shooting Guide......................................................................................................... 13
Electric Parts Trouble Shooting Guide................................................................................. 17
Feature of Controller............................................................................................................. 24
Exploded View and Replacement Parts List........................................................................ 30
2 Single Packaged Air Conditioner
Safety Precautions
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must be followed.
■ Be sure to read before installing the air conditioner.
■ Be sure to observe the cautions specified here as they include important items related to safety.
■ Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the following
indications.
WARNING
This symbol indicates the possibility of death or serious injury.
CAUTION
This symbol indicates the possibility of injury or damage to properties only.
■ Meanings of symbols used in this manual are as shown below.
Be sure not to do.
Be sure to follow the instruction.
WARNING
■ Installation
Do not use a defective or
underrated circuit breaker. Use
this appliance on a dedicated
circuit.
For electrical work, contact the
dealer, seller, a qualified
electrician, or an Authorized
Service Center.
Always ground the product.
• There is risk of fire or electric
shock.
• Do not disassemble or repair the
product. There is risk of fire or
electric shock.
• There is risk of fire or electric
shock.
Install the panel and the cover of
control box securely.
Always install a dedicated circuit
and breaker.
Use the correctly rated breaker
or fuse.
• There is risk of fire or electric
shock.
• Improper wiring or installation
may cause fire or electric shock
• There is risk of fire or electric
shock.
Service Manual 3
Safety Precautions
Use the specified wires to
connect the unit.
Do not install, remove, or reinstall the unit by yourself
(customer).
Be cautious when unpacking and
installing the product.
• There is risk of fire or electric
shock.
• There is risk of fire, electric
shock, explosion, or injury.
• Sharp edges could cause injury. Be
especially careful of the case edges
and the fins on the condenser and
evaporator.
For installation, always contact
the dealer or an Authorized
Service Center.
Do not install the product on a
defective installation stand.
Be sure the installation area
does not deteriorate with age.
• There is risk of fire, electric
shock, explosion, or injury.
• It may cause injury, accident, or
damage to the product.
• If the base collapses, the air conditioner
could fall with it, causing property
damage, product failure, and personal
injury.
■ Operation
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.
Take care to ensure that power
cable could not be pulled out or
damaged during operation.
Do not place anything on the
power cable.
• Moisture may condense and wet
or damage furniture.
• There is risk of fire or electric
shock.
• There is risk of fire or electric
shock.
Do not plug or unplug the power supply
plug during operation.
Do not touch(operate) the
product with wet hands.
Do not place a heater or other
appliances near the power cable.
• There is risk of fire or electric
shock.
• There is risk of fire or electrical
shock.
• There is risk of fire and electric
shock.
4 Single Packaged Air Conditioner
Safety Precautions
Do not allow water to run into
electric parts.
Do not store or use flammable gas
or combustibles near the product.
Do not use the product in a
tightly closed space for a long
time.
• It may cause There is risk of fire,
failure of the product, or electric
shock.
• There is risk of fire or failure of
product.
• Oxygen deficiency could occur.
Gasolin
When flammable gas leaks, turn
off the gas and open a window
for ventilation before turn the
product on.
If strange sounds, or small or smoke
comes from product. Turn the breaker
off or disconnect the power supply
cable.
Stop operation and close the window in
storm or hurricane. If possible, remove the
product from the window before the
hurricane arrives.
• Do not use the telephone or turn
switches on or off. There is risk of
• There is risk of electric shock or
fire.
• There is risk of property damage,
failure of product, or electric
shock.
When the product is soaked
(flooded or submerged), contact
an Authorized Service Center.
Be cautious that water could not
enter the product.
explosion or fire
Do not open the panel 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.
• There is risk of fire or electric
shock.
• There is risk of fire, electric
shock, or product damage.
Ventilate the product from time to time when
operating it together with a stove, etc.
Turn the main power off when cleaning or
maintaining the product.
• There is risk of fire or electric shock.
• There is risk of electric shock.
Service Manual 5
Safety Precautions
When the product is not be used for a long time,
disconnect the power supply plug or turn off the
breaker.
Take care to ensure that nobody could step on or
fall onto the unit.
• There is risk of product damage or failure, or
unintended operation.
• This could result in personal injury and product
damage.
CAUTION
■ Installation
Always check for gas (refrigerant)
pressure after installation or repair of
product.
Install the drain hose to ensure
that water is drained away
properly.
Keep level even when installing
the product.
• Low refrigerant levels may cause
failure of product.
• A bad connection may cause
water leakage.
• To avoid vibration or water
leakage.
90°
Do not install the product where the noise or
hot air from the outdoor unit could damage
the neighborhoods.
Don't use people to lift and
transport the product.
Do not install the product where it
will be exposed to sea wind (salt
spray) directly.
• It may cause a problem for your
neighbors.
• Avoid personal injury.
• It may cause corrosion on the product. Corrosion,
particularly on the condenser and evaporator fins,
could cause product malfunction or inefficient
operation.
Having perfect vacuum process in the factory, our units don't have drier but have filter in the refrigerant circuit.
In case of recharging R-410A gas in the field,
"DRIER" must be installed on the liquid line which is connected from discharge part of condenser to intake
part of evaporator. Because the refrigerant circuit is capable of containing water with imperfect vacuum.
6 Single Packaged Air Conditioner
Safety Precautions
■ Operation
Do not expose the skin directly to cool air for long
periods of time. (Don't sit in the draft.)
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 refrigeration system.
• This could harm to
your health.
• There is risk of
damage or loss
of property.
Do not block the inlet or outlet of
air flow.
Use a soft cloth to clean. Do not
use harsh detergents, solvents,
etc.
Do not touch the metal parts of the
product when removing the air filter.
They are very sharp!
• It may cause product failure.
• There is risk of fire, electric
shock, or damage to the plastic
parts of the product.
• There is risk of personal injury.
x
Wa Thinner
Do not step on or put anything
on the product. (outdoor units)
Always insert the filter securely. Clean
the filter every four weeks or more
often if necessary.
Do not insert hands or other objects
through the air inlet or outlet while the
product is operated.
• There is risk of personal injury
and failure of product.
• A dirty filter reduces the efficiency of
the air conditioner and could cause
product malfunction or damage.
• There are sharp and moving parts
that could cause personal injury.
Do not drink the water drained from the product.
Use a firm stool or ladder when cleaning or
maintaining the product.
• It is not sanitary and could cause serious health
issues.
• Be careful and avoid personal injury.
Service Manual 7
Model Number Nomenclature
Model Number Nomenclature
EK-H2408C00
1
2
3
4
5
6 7 8
1
Manufacturing plant/Refrigerant
2
Classification
3
Type
4
Capacity(Btu/h)
5
Voltage/frequency/phase
6
Air flow/Top Side
7
Method/SEER
8
Development Sequence
8 Single Packaged Air Conditioner
A
Changwon/R-410A
E
Turkey/R410A
K
Turkey/R-22
L
Changwon/R-22
K
Single packed Air Conditioner
N
Ducted split Air Conditioner
C
Cooling Only
H
Heat pump
036(36000 Btu/h)~360(360000Btu/h)
8
380~415V, 50Hz, 3Phase
9
380V, 60Hz, ,3Phase
B
220V, 60Hz, 3Phase
D
440~460V, 60Hz, 3Phase
C
Convertible Air Flow(Down+Horizontal)
H
Horizontal Air Flow
0
MICOM Control/10
A
Mechanic Control/10
D
Mechanic Control/13
Given Number by Delevelopment Sequence
General Data
General Data
Nominal ton
Models
Capacity
(Ton)
Cooling Capacity (net)
Heating Capacity (net)
Electrical Data Voltage
M.C.A (with standard motor) Cooling/Heating
Power Input
Cooling/Heating
Performance Air Circulation
Nominal CFM
EER (SEER)
Cooling/Heating
Sound Rating
Feature
Wired Remote Controller
Time Delay Safety Function
Cooling Operation Mode
Heating Operation Mode (with E/Heater)
Soft Dry Operation
Timer setting (24-Hour on/off)
Auto Restart Mode
Humidifier Funtion
Test Function
Defrost
Hot Start
Self-Diagnosis Function
Phase Reversal Error Sensing
Phase Loss Sensing
Filter Type
Compressor
Type
Quantity
Outdoor Coil Type
Tube Size (O.D)
Row/FPI
Length
Face area
Indoor Coil
Type
Tube Size (O.D)
Row/FPI
Length
Face area
Type
No. Used/Diameter (in.)
Drive Type
CFM
No. Motor / Motor Output (Hp)
Motor RPM
Indoor Fan
Type
No. Used
Diameter / Width
Drive Type / Motor Step
No. Motors
Motor Output (standard / oversized)
Motor rpm (standard / oversized)
Drain Connection Size (in.)
Dimensions
(WxHxD)
(Btu/hr)
(W)
(Kcal/h)
(Btu/hr)
(W)
(Kcal/h)
(V,PH)
(Amps)
(Watt)
CFM
(Btu/hr.W)
Bell
(inch)
(mm)
(inch)
(mm)
(sq.ft)
(m2)
(inch)
(mm)
(inch)
(mm)
(sq.ft)
(m2)
Outdoor Fan
Net Weight
inch/inch
hp/hp
hp/hp
(inch)
(mm)
(kg)
(lbs)
1) Test Condition of ISO Rated Cooling Capacity & Heating Capacity:
- Cooling : Ambient 95°F, Air Entering Temperature : 80.6°F DB and 6.2°F WB
- Heating : Ambient 44.8°F, Air Entering Temperature : 68°F DB and 59°F WB
20
EK-H2408C00
225,000
65,941
56,699
250,000
73,268
62,999
380~415V , 3PH
70
26,500/27,800
7,500
8.5/9.0
9.2
O
O
O
O
O
O
O
O
O
O
O
O
O
O
Washable & Anti-Fungus
Scroll
4
High Efficiency
9/32
7
3R / 17 FPI
78 3/4
2,000
41.59
3.86
High Efficiency
3/8
9.52
3R / 16 FPI
39 3/8
1,000
14.22
1.32
Propeller
4EA / 22
Direct
12,500
4 / 0.4
950
Centrifugal Blower Fan
1 EA
18" / 18"
Belt / 1
1EA
5 Hp / 7.5 Hp
2,870~2,900 / 2,860~2,900
1
114 3/32*49 7/82*86 5/8
2,898*1,250*2,200
900
1,984
2) Filters are standard supply.
Service Manual 9
Dimensions
Dimensions
UNIT Dimensions (Figure 1A)
Unit: inch(mm)
UNITS
20RT
H
49 7/32 (1250)
I
86 5/8 (2200)
J
114 3/32 (2898)
K
7 3/32 (180)
L
48 13/32 (1230)
M
3 5/32 (80)
N
3 5/32 (80)
CLEARANCE 34"
CLEARANCE 16"
K
H
N
M
J
I
CLEARANCE 34"
L
CLEARANCE 46"
Figure 1A
HORIZONTAL FLOW APPLICATION (Figure 1B)
Unit: inch(mm)
UNITS
20RT
A
34 5/8 (880)
B
17 5/8 (448)
C
23 5/8 (600)
D
3 31/32 (101)
E
7 5/32 (182)
F
39 3/8 (1000)
G
5 1/8 (137.5)
CLEARANCE 34"
CLEARANCE 16"
F
E
D
C
B
CLEARANCE 46"
G
25 19/32 (650)
Figure 1B
DOWN FLOW APPLICATION (Figure 1C)
20RT
UNITS
A
23
B
15 5/8 (396)
C
34 5/8 (880)
D
6 11/16 (170)
E
6 4/8 (165)
F
39 3/8 (1000)
G
6 11/16 (170)
H
25 19/23 (650)
5/8 (600)
10 Single Packaged Air Conditioner
B
C
D
G
E
A
F
Unit: inch(mm)
CLEARANCE 34"
A
RETURN
SUPPLY
TOP VIEW
H
H
H
Figure 1C
Refrigerant Circuit Diagram
Refrigerant Circuit Diagram
OUTDOOR
COIL
3.36(I.D)*23EA
CAPILLARY TUBE
2.0(I.D)*1EA
PRESSURE
CHECK PORT
PRESSURE
CHECK PORT
INDOOR
COIL
CAPILLARY TUBE
1.8(I.D)*9EA
HI PRESSURE
SWTICH
Cooling
CHECK
VALVE
COMP
A-1
CAPILLARY TUBE
2.0(I.D)*3EA
ACCUM
Heating
CHECK
VALVE
LOW PRESSURE
SWTICH
COMP
A-2
CHECK
VALVE
CAPILLARY TUBE
1.8(I.D)*9EA
CAPILLARY TUBE
2.0(I.D)*1EA
PRESSURE
CHECK PORT
PRESSURE
CHECK PORT
HI PRESSURE
SWTICH
CAPILLARY TUBE
2.0(I.D)*3EA
CHECK
VALVE
3.36(I.D)*23EA
Cooling
CHECK
VALVE
COMP
A-1
ACCUM
Heating
CHECK
VALVE
COMP
A-2
LOW PRESSURE
SWTICH
: Refrigerant Flow
Service Manual 11
Wiring Diagram
Wiring Diagram
EK-H2408C00
3854U20290U
54 003399 19 Rev:a
12 Single Packaged Air Conditioner
Troubleshooting Guide
Troubleshooting Guide
PACKAGE AIR CONDITIONER VOLTAGE LIMITS
NAME PLATE RATING
MINIMUM
MAXIMUM
380~415V
342V
457V
1. No cooling and heating operation performed
1) Both the blower and the compressor do not work
WHAT TROUBLED
Other parts except the
unit
COMPLAINTS
HOW TO CHECK
REMEDY
• Electric supply interrupted
• Defective power wiring
• Cut off power fuse
Measure power sypply
with a tester in case that
the same power source is
supplied to other
equipment except the unit,
what and where troubled
can be discovered by
checking the operation of
other equipment.
Too low voltage
Measure it with a tester.
Check the power source.
Use a thick cable if
necessary.
Magnetic Contactor for
compressor & fan motor
Control point is on
condition of "OFF" due to
trouble.
Make short-circuit, then
measure it with tester.
Replace it if necessary.
Operating switch
Troubled or defective
contactor
Check it with the eyes or
tester.
Repair or replace it.
• Repair a switch box
and relative instrument.
• Replacement of fuse
• Request a power
supplier to repair.
2) Only Indoor blowers do not work
WHAT TROUBLED
Motor
Electric wiring
COMPLAINTS
• Over heated
• Wiring short
• Cut- OFF of wiring
• Short circuited on
operation
HOW TO CHECK
REMEDY
Check it with tester
Repair or replace it.
Check it with a tester.
Rewiring or Repair.
Service Manual 13
Troubleshooting Guide
3) Only outdoor fan does not work
WHAT TROUBLED
COMPLAINTS
HOW TO CHECK
REMEDY
Motor
• Over-heated
• Wire short
Check how it is insulated.
Repair or replace it.
Electric Wiring
Cut off of wiring
Check it with a tester.
Rewiring or repair.
Short circuited on
operation
Capacitor
Defected
Check it with tester.
Replace it.
4) Only compressor does not work
WHAT TROUBLED
COMPLAINTS
HOW TO CHECK
REMEDY
Magnetic switch for
compressor motor
Defective contact,
magnetic coil troubled.
Check it with the eyes on
with a tester.
Repair or replace it.
Compressor motor
Troubled over-heated
(layer short)
Check how it is insulated.
Replace or repair the
compressor.
High pressure switch
Troubled or defective
contact or operating
Check it with a tester.
Replace it if
necessary.
Electric circuit
Defective connection or
disconnection of the circuit
for compressor.
Check it with a tester.
Rewiring or push
reset button.
14 Single Packaged Air Conditioner
Troubleshooting Guide
2. The Units discontinue after the operation started
WHAT TROUBLED
COMPLAINTS
HOW TO CHECK
REMEDY
Outdoor coil
Coil is dirty *1
Checking
Wash it by means of
something like chemical
washing.
In-condensable gas
blended.
Air intruded into the
refrigerant pipe line *1
In the event that
difference between the
saturating temperature
corresponding to high
pressure and the
temperature of air
discharged from the
outdoor coil is more than
15°C, incondensable gas
may be blended.
Extract air by vacuum
pump, then replenish
(charge) the refrigerant.
Improper adjustment
Check it with a pressure
gauge.
Read just it to normal
operating pressure.
(Note)
Don't alternate the
specified adjusting
pressure. If the adjusted
pressure exceed the
specified range, it will
cause a great accident.
A shortage of refrigerant
amount. * 2
Check pressure
Replenish the
refrigerant. Repair the
spot where it is leaked.
Reverse rotation of fan
Obstacle
Confirm the wind blowing
out upward.
Air short circuit *1
Check it with eyes.
If reversed, connect
interchanged wires to
each terminal.
Power wirings.
High pressure switch
Refrigerant
Outdoor Fan
Note: Use an appropriate measuring instrument for readjustment.
*1: High-pressure switch moves.
*2: Low- pressure switch moves.
Service Manual 15
Troubleshooting Guide
3. The unit is working, but not cooling and heating sufficiently
(Both blower and compressor are working)
WHAT TROUBLED
COMPLAINTS
HOW TO CHECK
REMEDY
Load
Much Cooling or Heating
load
Heat load increased.
Window or door has many
cracks or gaps.
Do necessary disposal
respectively.
Air flow
Obstacle disturbs Intake
of uniform airflow.
Checking
Correct it.
Short air volume
Reverse rotation of
blower.
Checking
Correct it.
Refrigerant
Shortage in the charged
refrigerant.
Coil inlet pipe is frosted
Recharge it.
(Repair the leakage spot).
Air passage
Improper or foreign bodies
Checking
Correct or clear the
foreign bodies.
Air filter
Clogged with dust
Checking
Cleaning
4. All the functions are performed as specified, but very noisy and vibrant
WHAT TROUBLED
Compressor
Blower
COMPLAINTS
HOW TO CHECK
REMEDY
Liquid refrigerant flooding
back from the evaporator.
• Check for refrigerant over-charge.
• Check to see if the intake air temperature is
extremely cold.
• Check for insufficient air flow quantity.
Faulty Discharge valve
and suction valve.
• Checking
• Replace the
compressor
Fan broken.
Checking
Repair or replace it.
Clear the foreign bodies.
Foreign matters intruded.
Screws
Looseness or fail-off of
screws
Checking
Correct
Electric troubles
(Magnetic contactor)
Defective contact.
Defective contact point.
Rusting and foreign
matters in the iron core
contact face. Defective
contact of the
operating switch.
Checking
Repair and clean or
replace it.
Others
Improper installation
Checking
Correct it.
16 Single Packaged Air Conditioner
Electronic parts Troubleshooting Guide
Electronic parts Troubleshooting Guide
Possible trouble 1
Is the input voltage of
Main PCB AC220V?
: The unit does not operate.
NO
1. Check the Fuse.
2. Check the wiring of AC220V.
YES
Is the output voltage
of IC03D(7812 ) on the
main PCB DC5V?
NO
1. Exchange IC03D(7805) on
the main PCB.
YES
Is the output voltage
of IC01A(7036) on the
main PCB DC5V?
NO
1. Exchange IC01A(7036) on
the main PCB.
YES
OSC01B vibration?
NO
1. Exchange OSC01B.
2. Check the pattern around
OSC01B on the main PCB.
YES
1. Exchange main PCB ASS'Y
Possible trouble 2
Is the power ON?
: The remote-controller does not operate.
NO
1. Check the FUSE.
2. Check the input voltage of
Main PCB ASS'Y.
YES
Is the input voltage
of remote-controller
DC12V?
YES
NO
1. Check or exchange the IC03D
on the Main PCB.
2. Check or exchange the
Connector (RED, BROWN)
of the remote controller.
1. Exchange remote-controller
2. Check or exchange the Main
PCB ASS'Y.
Service Manual 17
Electronic parts Troubleshooting Guide
Possible trouble 3
: Key input of remote-controller does not respond.
Is the connection between
MAIN PCB and remote-controller
correct?
NO
1. Check or repair Connector wiring.
2. Exchange the Connector.
YES
Is any key on the remote-controller
keeping pressed?
YES
1. Replace the pressed key.
2. Exchange the Knob or Key.
YES
1. Remove cause of Check.
NO
Is there Check(F**) on
the remote controller LCD?
NO
Is the input power voltage of
remote-controller DC12V?
NO
1. Check 220V Power on the
MAIN PCB.
YES
Is there OSC01B vibration
on the remote-controller
PCB?
NO
1. Exchange OSC01B
2. Check the pattern around OSC01B
on the remote-controller PCB.
YES
Do Keys have troubles?
YES
1. Check Keys.
2. Repair or exchange Key.
NO
Exchange remote-controller.
Possible trouble 4
Are there trouble in
LCD parts?
: LCD display on the remote-controller shows some trouble.
YES
1. Check crack, damage of LCD.
2. Check LCD pattern.
NO
Is there trouble in the
remote-controller PCB
ASS'Y?
YES
NO
Exchange remote-controller.
18 Single Packaged Air Conditioner
1. Check or repair all IC with
dust or moisture on the PCB.
2. Exchange remote-controller
PCB.
Electronic parts Troubleshooting Guide
Possible trouble 5
Is the unit operating?
: No cooling operation performed.
NO
1. Press power ON/OFF button.
YES
Is the cooling mode?
NO
1. Press cooling operation key.
2. After reenergizing power supply,
press power "ON/OFF" button.
NO
1. Set following.
'Set Temp. < Room Temp.'
YES
Set Temp. < Room Temp.?
YES
Is the output
voltage of IC03D on the MAIN
PCB DC5V?
NO
1. Check or exchange IC03D
on the MAIN PCB.
YES
Is the output
voltage of IC01M's 11,12(COMP B)PIN
on the MAIN PCB DC0V?
NO
1. Check or exchange IC01M.
2. Check 3-minutes time delay.
YES
Is the voltage
between A/B(COMP B) of CN-COMP
and NEUTRAL 220V?
NO
1. Check or exchange RY4/RY5(COMP B).
YES
Is the magnetic contactor
for compressor ON?
NO
1. Check the wiring of Magnetic
contactor.
2. Exchange Magnetic contactor.
YES
1. Check Compressor and
Capacitor for Compressor.
NOTE: 3ø model has not capacitor for compressor.
Service Manual 19
Electronic parts Troubleshooting Guide
Possible trouble 6
Is the heater operation?
: No heater operation performed.
NO
1. Select heater operation mode.
YES
Is the heater LCD "ON"?
NO
1. Reconnecting power supply.
Press Heater Key.
NO
1. Set following.
'Set temp. > Room temp.'
YES
Set temp. > Room temp.?
YES
Is the output
voltage of IC03D on the
MAIN PCB DC5V?
NO
1. Check or exchange IC03D,
IC02D on the MAIN PCB.
YES
Is the output
voltage of IC02M's 15, 16PIN on the
MAIN PCB 0V?
NO
1. Check or exchange IC02M.
YES
Is the voltage
between A/B(Heat B) of CN-HEAT
and NEUTRAL 220V?
NO
1. Check or exchange RY13/RY14(Heat A, B).
YES
Is the magnetic contactor for
heater ON?
NO
YES
Check or exchange E/Heater.
20 Single Packaged Air Conditioner
1. Check the wiring of Magnetic
contactor.
2. Exchange Magnetic contactor.
Electronic parts Troubleshooting Guide
Possible trouble 7
Is the indoor fan operation?
: No humidifier operation performed.
NO
1. Press cooling or fan operation
or heater operation key.
YES
Is the HUMID LCD "ON"?
NO
1. Press humidifier Key.
YES
Is the output
voltage of IC03D on the
MAIN PCB DC5V?
NO
1. Check or exchange IC03D.
IC02D on the MAIN PCB.
YES
Is the output
voltage of IC01M's 10PIN on
the MAIN PCB 0V?
NO
1. Check or exchange IC01M.
YES
Is the voltage
between 1PIN of CN-HUMID and
NEUTRAL 220V?
NO
1. Check or exchange RY3.
YES
Is the magnetic
contactor for humidifier ON?
NO
1. Check the wiring or Magnetic
contactor.
2. Exchange Magnetic contactor.
YES
Check the humidifier.
Service Manual 21
Electronic parts Troubleshooting Guide
Possible trouble 8
Is the unit operating?
: Indoor motor does not operate.
NO
1. Press power ON/OFF button.
2. Reconnect the power supply.
YES
Is the output
voltage of IC02M's 14PIN on
the MAIN PCB 0V?
NO
1. Check or exchange IC01M.
YES
Is the voltage
between 1PIN(IN) of CN-FAN(IN) and
NEUTRAL 220V?
NO
1. Check or exchange RY10.
YES
Is the "Power relay" for
indoor motor ON?
NO
1. Check the wiring of
"Power relay".
2. Exchange "Power relay".
YES
Check the indoor motor.
Possible trouble 9
Is it cooling operation?
: Outdoor motor does not operate.
NO
1. Press power "ON/OFF" button.
2. Select cooling operation.
YES
Is the compressor operating?
NO
YES
Is the output
voltage of IC02M's 13/12(OUT FAN B)
on the MAIN PCB 0V?
NO
1. Set following.
Set temp. < Room temp.
2. Wait, if the unit has operating
with 3-minute time delay.
1. Check or exchange IC02M.
YES
Is the voltage
between OUT A/B of CN-FAN and
NEUTRAL 220V?
NO
1. Check or exchange
RY11/RY12(OUT FAN B).
YES
Is the "Power relay" for
outdoor motor ON?
NO
YES
Check the outdoor motor A/B.
22 Single Packaged Air Conditioner
1. Check the wiring of
"Power relay".
2. Exchange "Power relay".
Electronic parts Troubleshooting Guide
Possible trouble 10
Is the heater operation?
: No heater operation performed.
NO
1. Select heater operation mode.
YES
Is the heater LCD "ON"?
NO
1. Reconnecting power supply.
Press Heater Key.
NO
1. Set following.
'Set temp. > Room temp.'
YES
Set temp. > Room temp.?
YES
Is the output
voltage of IC03D on the
MAIN PCB DC5V?
NO
1. Check or exchange IC03D
on the MAIN PCB.
YES
Is the output
voltage of IC01M's 16PIN on the
MAIN PCB 0V?
NO
1. Check or exchange IC01M.
YES
Is the voltage
between 1PIN of CN5 and
NEUTRAL 220V?
NO
1. Check or exchange RY1.
YES
Is the magnetic contactor for
heater OK?
NO
1. Check the wiring of Magnetic
contactor.
2. Exchange Magnetic contactor.
YES
Check or exchange E/Heater.
Service Manual 23
Features of Controller
Features of Controller
1. Main Controller Circuit Diagram
24 Single Packaged Air Conditioner
(L)
(N)
FUSE
RY13
HEAT(A)
IN
FAN(IN)
B
HEAT(B)
A CN_HAETER
R17K
D11K
A
R08K
D06D
IC02K
CN_FAN
FAN_OUT
(B)
B
D07D
FAN_OUT
(A)
IC03K
R
IC01K
IC01D
S/TRANS
RY3
HYMID
IC02D
C03D
C09D
ZD02D
CN_HUMID
COMP(B)
C03D1
L01D
COMP(A)
4WAY(B)
CN_COMP
D03D
COMP(B)
C01J
R03D
T
S
C05D
OUT
BP(B)
4WAY(A)
CN_BYPASS
IN
JP03
JP06
JP05
JP04
BP(A)
RY6
ZNR01J
CN_POWER
JP07
BP(B)
CN_B_CYCLE
JP02
C07D
OUT
IN
JP10
JP09
JP08
CN_A_CYCLE
BP(A)
JP12
PWB:6870A20012A
ASM:6871A10041
1
CN_RETURN_AIR
CN_SUB
3
CN_THMO
1 2
CN_TEMP_OUT
60
5
D02D
55
10
R11D
50
15
NF01J
RY14
4
JP18
JP17
SWITCH
JP14
L02K
D09K
CN_CC
(B)
(A)
CN_H/P (WH)
TEST_SW
45
20
LED4
LED3
LED2
LED1
40
25
NTC01D
RY4
R18K
RY10
D08D
C02A
L01K
JP15
35
30
C01D
RY11
(B)
(A)
CN_REMO
OSC01B
D01D
RY5
CN_PHASE
RY12
COMP(A)
RY9
JP11
MICOM
JP01
4WAY(A)
RY8
4WAY(B)
RY7
CN_ZONE
IC01A
D30CI
D11D
Features of Controller
2. Feature of Main Controller
ZD01F
Service Manual 25
CN_L/P(YL)
OP_J1
Features of Controller
3. Feature of Remote-Controller PCB ASS'Y
4. Feature of Remote-Controller LCD
AUTO SWING
OPERATION
SET TEMP
Room Temp
HI
MED
LO
AUTO Heater Preheat
JET Defrost Humidify
Filter Out door
ZONE
1 2 3 4
Time
Timer
Operation unit
On Off
Set no. Time 01
03
SUB FUNCTION
Program set
05
26 Single Packaged Air Conditioner
07
09
11
13
15
17
19
21
23
Features of Controller
5. Error Mode & Corrective Method
Error mode
Cause of error
Sensing condition of error
CH01
OPEN/SHORT of Voltage of sensing: Over 4.8V
room temp.
Voltage of sensing: Less than
sensor
0.5V
CH02
OPEN/SHORT of Voltage of sensing: Over 4.8V
indoor pipe temp. Voltage of sensing: Less than
0.5V
sensor
Communication
Error
Method of SVC
Remark
Room
1. Check the voltage of "CO1H"
temp.(25°C)
on the remote controller.
= DC 2.5V
2. Check the temp. sensor of
remtote controller.
1. Check the voltage between PIN 3 Pipe temp.(25°C)
and 4 of CN-A cycle/CN-B cycle.
= DC 2.2V
2. Check the temp. sensor of
indoor pipe.
CH03
Communication interruption
between remote controller and
Main PCB for 3 minutes.
1. Check the connecting wire
between main PCB remote
controller.
2. Check the input voltage of
remote-controller.
3. Check the wiring of
remote-controller.
Input voltage of
remote-controller
= DC 12V
CH04
OPEN/SHORT of Voltage of sensing: Over 4.8V
Voltage of sensing: Less than
outdoor pipe
0.5V
sensor
1. Check the voltage between PIN
1 and 2 of CN-A cycle/CN-B
cycle ON the main PCB.
2. Check the temp. sensor of
remtote controller.
Pipe
temp.(25°C)
= DC 2.5V
CH05
OPEN/SHORT of Voltage of sensing: Over 4.8V
Voltage of sensing: Less than
outdoor room
0.5V
temp. sensor
1. Check the voltage between
PIN 1 and 3 of CN-TEMP
OUT on the main PCB.
2. Check the temp. sensor of
outdoor room.
Room
temp.(25°C)
= DC 2.2V
CH16
OPEN of
A_Cycle_Low
Pressure Switch
1. Check Low Pressure Switch
2. Check Refrigerant pressure
CH17
OPEN of
B_Cycle_Low
Pressure Switch
Sensing the numer of Low pressure
S/W open after power_On
• First time within 1 minute
- 3 times during 30 minutes after
first time sensing
- 6 times until 30 minutes after first
time sensing
CH18
OPEN of
A_Cycle_High
Pressure Switch
1. Check High Pressure Switch
2. Check Refrigerant pressure
CH19
OPEN of
B_Cycle_High
Pressure Switch
Sensing the numer of high pressure
S/W open after power_On
• First time within 1 minute
- 3 times during 30 minutes after
first time sensing
- 6 times until 30 minutes after first
time sensing
CH21
Phase Reversal
Error
Sensing the Reversal Phase
1. Check Power Connection
CH22
Phase Loss
Sensing the Phase Missing
1. Check Power Connection
1. Check Low Pressure Switch
2. Check Refrigerant pressure
1. Check High Pressure Switch
2. Check Refrigerant pressure
Service Manual 27
F eatures of Controller
6. Principal part list of controller
Return Air
Outdoor
Sensor
Room Sensor
Remark
6323AQ3214M
EK-H2408C00
6871A10041H 6711A20043B EBG30413001 EBG30413002 (OPTIONAL) 6323A20010A
LG No
Heat Pump
Model
Main PCB
ASM
EK-H2408C00
ARCELIK-LG No 5400296908
Remote
controller
Pipe Sensor Pipe Sensor
A(In/Out)
B(In/Out)
5400305202 5400390201
5400390202
5400298512
(OPTIONAL)
5400403001
7. Principal partlist of Main PCB ASM
No
1
2
3
4
5
6
Part No LG
EAN30788301
6920WRD008A
6920AQ9054F
6212A90001E
6900AQ9028N
6102AQ9075A
Part No ARCELIK-LG
5400403601
5400403701
5400061906
5400314805
5400061413
5400057601
Part Name
MICOM(MAIN)
RELAY
RELAY
RESONATOR
FUSE
VARISTOR
Remarks
H/P
RY3,4,5,10,11,13,14
RY1,2,8,9,12
8. Principal partlist of Remote Controller
No
1
2
3
4
Part No LG
OITO641010B
6304A30001C
6871A20043A
6871A20043H
Part No ARCELIK-LG
5400403801
5400315003
5400403901
5400403908
Part Name
MICOM(Remote Controller)
LCD
Remote C PCB ASM
Remote C PCB ASM
28 Single Packaged Air Conditioner
Remarks
MICOM
Cooling Only
Heat Pump
Heat Pump
Features of Controller
9. Explanation of principal function
■ Flow Chart
START(Power supply)
YES
1. Initialize "micom".
2. A/D convert.
3. Main PCB: Waiting cooling operation.
4. Remote controller: Waiting input.
Dehumidification Mode?
A
NO
Heater operation mode?
YES
YES
Power ON?
YES
NO
Dehumidification operating
NO
Set Temp. > Indoor Temp.
YES
YES
NO
Cooling Mode?
Stop condition?
Heater operating
YES
YES
Go to A
NO
Set Temp. < Indoor Temp.
YES
NO
YES
Stop condition?
YES
YES
Go to A
Time delay mode
NO
Fan only operating
Cooling operating
NO
Stop condition?
YES
Go to A
NO
Stop condition?
YES
Go to A
Service Manual 29
Exploded View and Replacement Parts List
Exploded View and Replacement Parts List
• Exploded View
237204-2
435312
237204-1
437212
137213-1
554160
552202
548490
566000-2
559010
552201
566000-1
561410
263230
561410
354210
552111-2
546810
552111-1
554031
137210-2
549610
552111-3
137210-1
330870
359012
342800
349600
346810
W4400
145610
145610
152302
237204-1
237204-2
263230
268714
566001-1
137213-2
137213-3
566001-2
W6920
W0CZZ
249950
267110
30 Single Packaged Air Conditioner
Exploded View and Replacement Parts List
•Replacement Parts List
LOCATION
No
145610-1
145610-2
152302
249950
263230
263230
263230
267110
268714
330870
342800
346810
349600
354210
359012
435312
437212
546810
548490
549610
552111-1
552111-2
552201
554031
554160
559010
566000-1
566000-2
566001-1
566001-2
137210-1
137210-2
137213-1
137213-2
137213-3
237204-1
237204-2
W0CZZ
W4400
W6920
552202
561410
552111-3
DESCRIPTION
PULLEY ASSEMBLY
PULLEY ASSEMBLY
FILTER(MECH),A/C
CONTROL BOX ASSEMBLY, SINGLE
THERMISTOR ASSEMBLY
THERMISTOR ASSEMBLY
THERMISTOR ASSEMBLY
REMOTE CONTROL ASSEMBLY
PWB(PCB) ASSEMBLY, MAIN
DRAIN PAN ASSEMBLY
BEARING
MOTOR ASSEMBLY, INDOOR
BRACKET ASSEMBLY
EVAPORATOR ASSEMBLY, FIRST
FAN ASSEMBLY, BLOWER
GRILLE ASSEMBLY, DISCHARGE (OUTDOOR)
PANEL REAR(OUTDOOR)
MOTOR ASSEMBLY, OUTDOOR
ACCUMULATOR ASSEMBLY (MECH)
MOUNT ASSEMBLY, MOTOR (OUTDOOR)
TUBE ASSEMBLY, CAPILLARY
TUBE ASSEMBLY, CAPILLARY
VALVE, CHECK
CONDENSER ASSEMBLY, FIRST
COMPRESSOR
FAN ASSEMBLY , PROPELLER
SWITCH, PRESSURE
SWITCH, PRESSURE
SWITCH, MAGNET
SWITCH, MAGNET
PANEL ASSEMBLY, FRONT(INDOOR)
PANEL ASSEMBLY, FRONT(INDOOR)
PANEL ASSEMBLY, SIDE
PANEL ASSEMBLY, SIDE
PANEL ASSEMBLY, SIDE
PANEL, SIDE
PANEL, SIDE
CAPACITOR, DRAWING
BELT, V
RELAY
VALVE,REVERSING
COIL ASSEMBLY,REVERSING VALVE
B CAPI ASSY
LG PART No.
ARCELIK-LG PART No.
EK-H2408C00
3A00217S
4561A30003E
5230A20003Q
4995A10092F
EBG30413001
EBG30413002
6323A20010A
6711A20043B
6871A10041H
3087A10013C
4A00131B
4681A20093D
4811A10001A
5421A20151A
5835A20003D
3530A20007H
3720A10249B
4681A20106E
4848A20001J
4961A20029A
5211A10549A
5211A10549B
3A01020L
5403A20137S
2520UBDY2AB
5901A10010A
3A02524H
3A02524L
6600B000032
6600B000041
3721A10073B
3721A10074B
3721A10075D
3721A10076C
3721A10076D
3720A13001C
3720A13001D
2A00986C
4400A30002W
6920AP3400A
5220AP3777C
6141AR3733V
AJR30136901
EK-H2408C00
5400291617
5400315505
5400303915
5400296106
5400390201
5400390202
5400403001
5400305202
5400296908
5400290203
5400315402
5400290904
5400315301
5400292001
5400315204
5400157708
5400303002
5400300905
5400389601
5400301001
5400309601
5400309602
5400039411
5400289117
5400378101
5400310701
5400156408
5400156411
5400298301
5400278625
5400286702
5400287102
5400301404
5400303303
5400303304
5400303103
5400303104
5400126503
5400291721
5400158801
5400378203
5400057720
5400390301
REMARKS
Indoor Motor
Blower Side
Pipe Sensor A-cycle
Pipe Sensor B-cycle
Outdoor Temp. Sensor
For A-cycle
For B-cycle
PCM Fin
Low Pressure Switch
High Pressure Switch
For Indoor Motor
For Compressor
For Outdoor Motor
For Outdoor Motor
For Heat Pump
Service Manual 31
P/No.: 3828A31005F
P/No.: 5400305106 Rev.:a