Friedrich KP08A10 Building instructions

Room Air Conditioner
Service and Parts
Manual
KP Line
KP08 (03/03)
KP08A10

—2—
1. PREFACE
1.1 SAFETY PRECAUTIONS................................2
1.2 INSULATION RESISTANCE TEST.................2
1.3 SPECIFICATIONS...........................................3
1.4 FEATURES......................................................4
1.5 CONTROL LOCATIONS .................................4
2. DISASSEMBLY INSTRUCTIONS
2.1 MECHANICAL PARTS....................................5
2.1.1 FRONT GRILLE .....................................5
2.1.2 CABINET................................................5
2.1.3 CONTROL BOX .....................................5
2.2 AIR HANDLING PARTS..................................6
2.2.1 AIR GUIDE AND TURBO FAN...............6
2.2.2 FAN ........................................................6
2.2.3 SHROUD................................................7
2.3 ELECTRICAL PARTS......................................7
2.3.1 OVERLOAD PROTECTOR....................7
2.3.2 COMPRESSOR......................................7
2.3.3 CAPACITOR...........................................8
2.3.4 POWER CORD ......................................8
2.3.5 MOTOR ..................................................9
2.4 REFRIGERATION CYCLE..............................9
2.4.1 CONDENSER.........................................9
2.4.2 EVAPORATOR.......................................9
2.4.3 CAPILLARY TUBE...............................10
3. INSTALLATION
3.1 SELECT THE BEST LOCATION...................12
3.2 CHECK OF INSTALLATION..........................12
3.3 HOW TO DRAIN............................................12
3.4 HOW TO INSTALL ........................................13
3.4.1 WHEN USING GASKET.......................13
3.4.2 WHEN USING INSTALLATION KITS...13
4. TROUBLESHOOTING GUIDE
4.1 OUTSIDE DIMENSIONS...............................16
4.2 PIPING SYSTEM...........................................17
4.3 TROUBLESHOOTING GUIDE......................18
5. SCHEMATIC DIAGRAM
5.1 CIRCUIT DIAGRAM ......................................30
5.2 ELECTRONIC CONTROL DEVICE...............33
5.3 COMPONENTS LOCATION(FOR MAIN P.C.B ASM)
..32
5.4
COMPONENTS LOCATION(FOR DISPLAY P.C.B ASM)
...32
6. EXPLODED VIEW..................................33
7. REPLACEMENT PARTS LIST........34
1. PREFACE
This SERVICE MANUAL provides various service information, including the mechanical and electrical
parts etc. This room air conditioner was manufactured and assembled under a strict quality control system.
The refrigerant is charged at the factory. Be sure to read the safety precautions prior to servicing the unit.
1.1 SAFETY PRECAUTIONS
1. When servicing the unit, set the ROTARY SWITCH
or POWER SWITCH to OFF and unplug the power
cord.
2. Observe the original lead dress.
If a short circuit is found, replace all parts which
have been overheated or damaged by the short
circuit.
3. After servicing the unit, make an insulation resis-
tance test to protect the customer from being
exposed to shock hazards.
1.2 INSULATION RESISTANCE TEST
1. Unplug the power cord and connect a jumper
between 2 pins (black and white).
2. The grounding conductor (green) is to be open.
3. Measure the resistance value with an ohm meter
between the jumpered lead and each exposed
metallic part on the equipment at all the positions
(except OFF) of the ROTARY SWITCH.
4. The value should be over 1MΩ.
CONTENTS

—3—
POWER SUPPLY
COOLING CAPACITY (Btu/h)
INPUT (W)
RUNNING CURRENT (A)
E.E.R (BTU/W.h)
INDOOR (°C)
OUTDOOR (°C)
REFRIGERANT (R-22) CHARGE
EVAPORATOR
CONDENSER
FAN, INDOOR
FAN, OUTDOOR
FAN SPEEDS, FAN/COOLING
FAN MOTOR
OPERATION CONTROL
ROOM TEMP. CONTROL
AIR DIRECTION CONTROL
CONSTRUCTION
PROTECTOR COMPRESSOR
FAN MOTOR
POWER CORD
DRAIN SYSTEM
NET WEIGHT (lbs/kg)
OUTSIDE DIMENSION (inch)
(W x H x D) (mm)
1ø, 115, 60Hz
7,850
730
6.6
10.7
26.7(DB)* 19.4(WB)**
35(DB)* 23.9(WB)**
440g (15.5 oz)
3 ROW 11 STACKS, SLIT-FIN TYPE
2 ROW 16 STACKS, L-BENDED TYPE
TURBO FAN
PROPELLER TYPE FAN WITH SLINGER RING
3/3
6 POLES
REMOTE CONTROLLER
THERMISTOR
VERTICAL LOUVER (RIGHT & LEFT)
HORIZONTAL LOUVER (UP & DOWN)
SLIDE IN-OUT CHASSIS
OVERLOAD PROTECTOR
INTERNAL THERMAL PROTECTOR
(3 WIRE WITH GROUDING)
ATTACHMENT PLUG (CORD-CONNECTED TYPE)
DRAIN PIPE OR SPLASHED BY FAN SLINGER
62/28
203/32 x 1329/32 x 193/8
510 x 354 x 490
KP08A10
MODELS
ITEMS
OPERATING
CONDITION
1.3 SPECIFICATIONS
1.3.1 FOR LW8000PR
* DB:Dry Bulb
** WB:Wet Bulb

—4—
1.4 FEATURES
• Designed for COOLING ONLY.
• Powerful and whispering cooling.
•Slide-in and slide-out chassis for the simple
installation and service.
• Low air-intake, top cooled-air discharge.
1.5 CONTROL LOCATIONS
• Built-in adjustable Thermistor
• Washable one-touch filter
• Compact size
• Reliable and efficient rotary compressor is equipped.
Power
Temp
Fan Speed
Timer Mode
1
2
3
4
5
1
2
453
6
DISPLAY REMOTE CONTROL
Precaution: The Remote Control unit will not function properly if strong light strikes the sensor window of the air
conditioner or if there are obstacles between the Remote Control unit and the air conditioner.
POWER BUTTON
To turn the air conditioner ON, push the button. To turn the air conditioner OFF, push the button again.
This button takes priority over any other buttons.
ROOM TEMPERATURE SETTING BUTTON
This button can automatically control the temperature of the room. The temperature can be set within a range of 60°F to
86°F by 1°F. (16°C to 30°C by 1°C)
Select the lower number for lower temperature of the room.
OPERATION MODE SELECTION BUTTON
Every time you push this button, it will shift among COOL, ENERGY SAVER, FAN and DRY.F
- Energy Saver: If Energy Save mode is selected, the fan stops when the compressor stops cooling.
Approximately every 3 minutes the fan will turn on and check the room air to determine if cooling is needed.
FAN SPEED SELECTOR
Every time you push this button, it is set as follows.
(Hi [F3] ➔ Low [F1] ➔ Med [F2] ➔ Hi [F3] ➔ Low [F1] ➔...)
ON/OFF TIMER BUTTON
You can set the time when the unit will turn on or turn off automatically by pressing the timer button. If the unit is operating,
this button controls the time it will be turned off. If the unit is off state, this button controls the time it will start. Every time
you push this button, the remaining time will be set as follows.
- Stopping operation
(1Hour ➔ 2Hours ➔3Hours ➔4Hours ➔ 5Hours ➔6Hours ➔7Hours ➔8Hours ➔9Hours ➔10Hours ➔11Hours ➔
12Hours ➔0Hour ➔ 1Hour ➔ 2Hours ➔... )
- Starting operation
(1Hour ➔ 2Hours ➔3Hours ➔4Hours ➔ 5Hours ➔6Hours ➔7Hours ➔8Hours ➔9Hours ➔10Hours ➔11Hours ➔
12Hours ➔off ➔ 1Hour ➔ 2Hours ➔ ... )
REMOCON SIGNAL RECEIVER
6
6

—5—
2.1 MECHANICAL PARTS
2.1.1 FRONT GRILLE
1. Open the lnlet grille downward and remove the air
filter.
2. Remove the screw which fastens the front
grille.(See Figure 1)
3. Pull the front grille from the right side.
4. Remove the front grille.(There are 4 hooks.)
5. Re-install the components by referring to the
removal procedure, above.
2.1.2 CABINET
1. After disassembling the FRONT GRILLE, remove
the 2 screws which fasten the cabinet at both
sides.
2. Remove the 2 screws which fasten the cabinet at
back.
3. Pull the base pan forward. (See Figure 2)
4. Remove the cabinet.
5. Re-install the components by referring to the
removal procedure, above.
2.1.3 CONTROL BOX
1. Remove the front grille. (Refer to section 2.1.1)
2. Remove the cabinet. (Refer to section 2.1.2)
3. Remove the 2 screws which fasten the power
cord.
4. Disconnect the grounding screw from the
evaporator channel.
5. Remove the 1 screw which fasten the control box
cover.
6. Remove the housing which connects PCB and
motor wire in the control box.
7. Disconnect the housing which connects Plazma
Air Purifier.(Optional)
8. Remove the screw at left cover of filter case and
open the cover to remove inner screw. (Optional)
9. Remove the nut which fastens the terminal cover.
10. Remove the terminal cover.
11. Remove all the leads from the overload protector.
12. Discharge the capacitor by placing a 20,000
ohmresistor across the capacitor terminals.
13. Raise the control box upward completely.
(See Figure 3)
14. Re-install the components by referring to the
removal procedure, above.
(Refer to the circuit diagram found on page 32 in
this manual and on the control box.)
2. DISASSEMBLY INSTRUCTIONS
—Before the following disassembly, POWER SWITCH set to OFF and disconnect the power cord.
Figure 1
Figure 3
Figure 2

—6—
2.2 AIR HANDLING PARTS
2.2.1 AIR GUIDE AND TURBO FAN
1. Remove the front grille. (Refer to section 2.1.1)
2. Remove the cabinet. (Refer to section 2.1.2)
3. Remove the control box. (Refer to section 2.1.3)
4. Remove the 4 screws which fasten the brace.
5. Remove the brace.
6. Remove the 2 screws which fasten the air guide
upper.
7. Remove the air guide upper.(See figure 4)
8. Remove the 2 screws which fasten the evaporator.
9. Move the evaporator forward and pulling it upward
slightly. (See Figure 5)
10. Pull out the hook of orifice by pushing the tabs
and remove it. (See Figure 6)
11. Remove the clamp with a hand plier which
secures the turbo fan.
12. Remove the turbo fan.
13. Remove the 2 screws which fasten the air guide
from the base pan.
14. Move the air guide backward, and pull out from
the base pan.(Move the air giude lower carefully.)
15. Re-install the components by referring to the
removal procedure, above.
2.2.2 FAN
1. Remove the cabinet. (Refer to section 2.1.2)
2. Remove the brace (Refer to section 2.2.1)
3. Remove the 5 screws which fasten the condenser.
4. Move the condenser to the left carefully.
5. Remove the clamp which secures the fan.
6. Remove the fan. (See Figure 7)
7. Re-install by referring to the removal procedure.
Figure 4
Figure 5
Figure 6
Figure 7

—7—
2.2.3 SHROUD
1. Remove the fan. (Refer to section 2.2.2)
2. Remove the shroud. (See Figure 8)
3. Re-install the components by referring to the
removal procedure, above.
2.3 ELECTRICAL PARTS
2.3.1 OVERLOAD PROTECTOR
1. Remove the cabinet. (Refer to section 2.1.2)
2. Remove the nut which fastens the terminal cover.
3. Remove the terminal cover. (See Figure 9)
4. Remove all the leads from the overload protector.
5. Remove the overload protector.
6. Re-install the components by referring to the
removal procedure, above.
2.3.2 COMPRESSOR
1. Remove the cabinet. (Refer to section 2.1.2)
2. Discharge the refrigerant system using a FreonTM
Recovery System.
If there is no valve to attach the recovery system,
install one (such as a WATCO A-1) before venting
the FreonTM. Leave the valve in place after
servicing the system.
3. Remove the overload protector. (Refer to section
2.3.1)
4. After purging the unit completely, unbraze the
suction and discharge tubes at the compressor
connections.
5. Remove the 3 nuts and the 3 washers which
fasten the compressor.
6. Remove the compressor. (See Figure 10)
7. Re-install the components by referring to the
removal procedure, above.
Figure 8
Figure 9
Figure 10

—8—
2.3.3 CAPACITOR
1. Remove the control box. (Refer to section 2.1.3)
2. Open the top cover from the control box.
(See Figure 11)
3. Pull out the capacitor from the control box.
4. Disconnect all the leads of capacitor terminals.
5. Re-install the components by referring to the
removal procedure, above.
2.3.4 POWER CORD
1. Remove the control box. (Refer to section 2.1.3)
2. Open the top cover from the control box.
(Refer to section 2.3.3)
3. Disconnect the front panel from the control box.
(See Figure 12)
4. Disconnect two leads from the capacitor and relay.
5. Pull out the power cord.
6. Re-install the component by referring to the above
removal procedure, above.
(Use only one ground-marked hole for ground
connection.)
7. If the supply cord of this appliance is damaged, it
must be replaced by the special cord.
(The special cord means the cord which has the
same specification marked on the supply cord
attached at the unit.)
Figure 12
Figure 11

—9—
2.3.5 MOTOR
1. Remove the cabinet. (Refer to section 2.1.2)
2. Remove the turbo fan. (Refer to section 2.2.1)
3. Remove the fan. (Refer to section 2.2.2)
4. Remove the 4 screws which fasten the motor from
the air guide. (See Figure 13)
5. Remove the motor.
6. Re-install the components by referring to the
removal procedure, above.(See Figure 13)
2.4 REFRIGERATING CYCLE
2.4.1 CONDENSER
1. Remove the cabinet. (Refer to section 2.1.2)
2. Remove the 5 screws which fasten the
brace.(Refer to section 2.2.1)
3. Remove the 5 screws which fasten the condenser
and shroud.
4. After discharging the refrigerant completely,
unbraze the interconnecting tube at the condenser
connections.
5. Remove the condenser.
6. Re-install the components by referring to notes.
(See Figure 14)
2.4.2 EVAPORATOR
1. Remove the control box.(Refer to section 2.1.3)
2. Remove the air guide upper. (Refer to section
2.2.1)
3. Remove the 2 screws which fasten the evaporator.
4. Move the evaporator sideways carefully.
(Refer to section 2.2.1)
5. After discharging the refrigerant completely,
unbraze the interconnecting tube at the evaporator
connections.
6. Remove the evaporator.
7. Re-install the components by referring to notes.
(See Figure 15)
Figure 13
Figure 14
Figure 15
Discharge the refrigerant system using a
FreonTM Recovery System.
If there is no valve to attach the recovery
system, install one (such as a WATCO A-1)
before venting the FreonTM. Leave the valve in
place after servicing the system.
CAUTION

—10—
—Replacement of the refrigeration cycle.
1. When replacing the refrigeration cycle, be sure to
Discharge the refrigerant system using a FreonTM
recovery System.
If there is no valve to attach the recovery system,
install one (such as a WATCO A-1) before venting
the FreonTM. Leave the valve in place after
servicing the system.
2. After discharging the unit completely, remove the
desired component, and unbraze the pinch-off
tubes.
3. Solder service valves into the pinch-off tube ports,
leaving the valves open.
4. Solder the pinch-off tubes with Service valves.
5. Evacuate as follows.
1) Connect the vacuum pump, as illustrated figure
16A.
2) Start the vacuum pump, slowly open manifold
valves A and B with two full turns
counterclockwise and leave the valves open.
The vacuum pump is now pulling through valves
A and B up to valve C by means of the manifold
and entire system.
3) Operate the vacuum pump for 20 to 30 minutes,
until 600 microns of vacuum is obtained. Close
valves A and B, and observe vacuum gauge for
a few minutes. A rise in pressure would
indicate a possible leak or moisture remaining in
the system. With valves A and B closed, stop
the vacuum pump.
4) Remove the hose from the vacuum pump and
place it on the charging cylinder. See figure
16B.
Open valve C.
Discharge the line at the manifold connection.
5) The system is now ready for final charging.
6. Recharge as follows :
1) Refrigeration cycle systems are charged from
the High-side. If the total charge cannot be put
in the High-side, the balance will be put in the
suction line through the access valve which you
installed as the system was opened.
2) Connect the charging cylinder as shown in figure
16B.
With valve C open, discharge the hose at the
manifold connection.
3) Open valve A and allow the proper charge to
enter the system. Valve B is still closed.
4) If more charge is required, the high-side will not
take it. Close valve A.
5) With the unit running, open valve B and add the
balance of the charge.
a. Do not add the liquid refrigerant to the Low-
side.
b. Watch the Low-side gauge; allow pressure to
rise to 30 lbs.
c. Turn off valve B and allow pressure to drop.
d. Repeat steps b. and c. until the balance of the
charge is in the system.
6) When satisfied the unit is operating correctly,
use the pinch-off tool with the unit still running
and clamp on to the pinch-off tube. Using a tube
cutter, cut the pinch-off tube about 2 inches from
the pinch-off tool. Use sil-fos solder and solder
pinch-off tube closed. Turn off the unit, allow it to
set for a while, and then test the leakage of the
pinch-off connection.
NOTES
If high vacuum equipment is used, just crack
valves A and B for a few minutes, then open
slowly with the two full turns counterclockwise.
This will keep oil from foaming and being
drawn into the vacuum pump.
2.4.3 CAPILLARY TUBE
1. Remove the cabinet. (Refer to section 2.1.2)
2. After discharging the refrigerant completely,
unbraze the interconnecting tube at the capillary
tube.(See caution above)
3. Remove the capillary tube.
4. Re-install the components by referring to notes.
CAUTION

—11—
Equipment needed: Vacuum pump, Charging cylinder, Manifold gauge, Brazing equipment. Pin-off tool capable
of making a vapor-proof seal, Leak detector, Tubing cutter, Hand Tools to remove components, Service valve.
A
COMPOUND GAUGE
EVAPORATOR
(LOW PRESSURE SIDE)
COMPRESSOR
CAPILLARY TUBE
CONDENSER
(HIGH PRESSURE SIDE)
SEE INSETS
BELOW
MANIFOLD
GAUGE
B
Figure 16A-Pulling Vacuum Figure 16B-Charging
A
B
EXTERNAL
VACUUM PUMP
A
CHARGING
CYLINDER
LOW HI
B
C

—12—
3. INSTALLATION
3.1 SELECT THE BEST LOCATION
1.To prevent vibration and noise, make sure the unit
is installed securely and firmly.
2.Install the unit where the sunlight does not shine
directly on the unit.
3.The outside of the cabinet must extend outward for
at least 12" and there should be no obstacles, such
as a fence or wall, within 20" from the back of the
cabinet because it will prevent heat radiation of the
condenser.
Restriction of outside air will greatly reduce the
cooling efficiency of the air conditioner.
4.Install the unit a little slanted so the back is slightly
lower than the front (about 1/2"). This will help force
con-densed water to the outside.
5.Install the unit from the bottom about 30"~60"
above the floor level.
3.2 CHECK OF INSTALLATION
The setting conditions must be checked prior to
initial starting.
The undermentioned items are especially important
checking points when the installation is finished.
1. Grounding wire (Green or Green and Yellow) is
provided in the power cord. The green wire must
be grounded.
2. Connect to a single-outlet 15A circuit.
(or 20A circuit for Electric Heater Model)
3. To avoid vibration or noise, make sure the air
conditioner is installed securely.
4 Avoid placing furniture or draperies in front of the
air inlet and outlet.
3.3. HOW TO DRAIN
(When using drain pipe)
The air conditioner must be installed horizontally or
tilted slightly to the outside for proper water
drainage.
On exceptionally hot and humid days the air
conditioner may overflow condensed water.
If the air conditioner is used in hot and a high
humidity zone, exchange the HOLE RUBBER
for the DRAIN PIPE.(See figure 18, figure 19.)
All side louvers of the cabinet must remain
exposed to the outside of the structure.
AWNING
COOLED AIR HEAT
RADIATION
30"~60"
ABOUT 1/2"
Over 20"
FENCE
BOTTOM
HOLE RUBBER
1
BASE PAN
BOTTOM
HOLE RUBBER
2
BASE PAN
Figure 18
Figure 19
Figure 17
CAUTION

—13—
3.4 HOW TO INSTALL
3.4.1 WHEN USING GASKET
3.4.2 WHEN USING INSTALLATION KITS
A. WINDOW REQUIREMENTS
This unit is designed for installation in
standard double hung windows with actual opening
widths from 25" to 36".
The top and bottom window sash must open
sufficiently to allow a clear vertical opening of 16"
from the bottom of the upper sash to the window
stool.
A
B
DEF
C
HJ
2
3
4
2
1
G
A
RIGHT SIDE
HORIZONTAL
LINE
B
1. WINDOW (WIDTH-A, HEIGHT-B)
2. GASKET
3. WALL
4. DETAILS 5.1 x 30 ROUND HEAD WOOD
SCREWS
ABCDE F HJK
535mm 366mm 250mm 30mm 0~25mm OVER 420mm 32 5~10mm 0~5mm
(211/2") (147/16") (10") (11/16") (0~1") (OVER 1617/32") (11/4") (3/16"~3/8") (0~3/16")
12 3 4
8 13
765
12
11
NO. NAME OF PARTS Q'TY
1 FRAME CURTAIN 2
2 SILL SUPPORT 2
3 BOLT 2
4 NUT 2
5 SCREW (TYPE A) 13
6 SCREW (TYPE B) 3
7 SCREW (TYPE C) 5
8 FOAM-STRIP 1
11 FRAME GUIDE 2
12
WINDOW LOCKING BRACKET 1
13 FOAM-PE 1
B. INSTALLATION KITS CONTENTS
25" to 36"
15" min Stool
Interior wall
203/32" min
(Without frame curtain)
Offset
1/2" to 11/4"
Sill
Exterior

—14—
SUGGESTED TOOL REQUIREMENTS
SCREWDRIVER(+, -), RULER, KNIFE, HAMMER, PENCIL, LEVEL
PREPARATION OF CHASSIS
1. Remove the screws which fasten the cabinet at
both sides and at the back.
2. Slide the unit out from the cabinet by gripping the
base pan handle and pulling forward while
bracing the cabinet.
3. Cut the window sash seal to the proper length. Peel
off the backing and attach the Foam-Pe to the
underside of the window sash.
4. Remove the backing from the top upper guide
Foam PE and attach it to the bottom of the Upper
Guide .
5. Attach the upper guide onto the top of the cabinet
with 3 type A screws.
6. Insert the Frame Guides into the bottom of the
cabinet.
7. Insert the Frame Curtain into the upper guide
and Frame Guides .
8. Fasten the curtains to the unit with 4 Type A screws
at the both sides.
CABINET INSTALLATION
1. Open the window. Mark a line on center of the
window stool (or desired air conditioner location).
Carefully place the cabinet on the window stool and
align the center mark on the front angle with the
center line marked in the window stool.
2. Pull the bottom window sash down behind the
upper guide until it meets.
NOTE:
•Do not pull the window sash down so tightly that the
movement of Frame Curtain is restricted.
Shipping
Screws
13
(Type A)
(Type A)
5
5
11
11
9
5
EPS Material
Upper Guide Window stool
Front Angle
Window Sash Upper guide
9
Frame Curtain
1
Foam-pe
10
Foam-pe
13
Cabinet
Figure 20
Figure 21

INDOOR OUTDOOR
Sill Support
Nut
Bolt
2
4
3
INDOOR OUTDOOR
12
7
5
Frame Guide
About 1/2"
Screw(Type A)
Cabinet
6
2
About 1/2"
Screw(Type B) 5 Screw(Type A)
Sill support
Type C
Sash track
Front Angle
Screw(Type B) 6
Sill support 2
—15—
3. Loosely assemble the sill support using the parts
in Figure 22.
4. Select the position that will place the sill
support near the outer most point on sill
(See Figure 22)
NOTE: Be careful when you install the cabinet
(Frame Guides are broken easily).
5. Attach the sill support to the cabinet track hole in
relation to the selected position using
2 Type A screws in each support (See Figure 23).
6. The cabinet should be installed with a very slight
tilt (about 1/2") downward toward the outside
(See Figure 24).
Adjust the bolt and the nut of Sill Support for
balancing the cabinet.
7. Attach the cabinet to the window stool by
driving the screws (Type B: Length sixteen
millimeters and below.) through the front angle into
window stool (5/8").
8. Pull each Frame Curtain properly to each
window sash track, and repeat step 2.
9. Attach each Frame Curtain to the window sash
by using screws (Type C).
(See Figure 25)
Figure 22
Figure 23
Figure 24
Figure 25

DEFROST HEATCOOL
INDOOR DESIRED
ENERGY
SAVER
AIR
PURYFIER
AUTO
RESTART
FAN
FAN
DRY
Screw(Type A) Screw(Type A)
Power cord
13
8
Foam-Strip
354(13 / ")
29
490(19 / )
38"
29(1 / )
532"
18( / )
2332"
126.5(4 / )
3132"
32
510 20332
—16—
4. TROUBLESHOOTING GUIDE
4.1 OUTSIDE DIMENSIONS unit: mm(inch)
10. Slide the unit into the cabinet.(See Fig. 26)
CAUTION: For security purpose, reinstall screws (Type
A) at the cabinet's sides.
11. Cut the Foam-Strip to the proper length and insert
between the upper and lower window sash.
(See Fig. 27)
12. Attach the window Locking Bracket with a type C
screw. (See Fig. 28)
13. Attach the front grille to the cabinet by inserting the
tabs on the grille into the tabs on the front of the
cabinet. Push the grille in until it snaps into
place.(See Fig. 29)
14. Lift the inlet grille and secure it with a type A screw
through the front grille.(See Fig. 30)
Figure 26
Figure 27
Figure 28
Figure 31
Figure 30
Figure 29

—17—
4.2 PIPING SYSTEM
Figure 32 is a brief description of the important components and their function in what is called the refrigeration
system. This will help you to understand the refrigeration cycle and the flow of the refrigerant in the cooling cycle.
MOTOR
COMPRESSOR
OIL
(LIQUID REFRIGERANT)
CAPILLARY TUBE
OUTSIDE COOLING
AIR FOR REFRIGERANT
PASS THROUGH
SUCTION LINE
COOL LOW PRESSURE VAPOR
COOLED
AIR
COMPLETE LIQUID
BOIL OFF POINT
LIQUID
PRESSURE
DROP
ROOM AIR HEAT LOAD
VAPOR INLET HOT
DISCHARGED
AIR
LIQUID OUTLET
HIGH PRESSURE VAPOR
LIQUID REFRIGERANT
LOW PRESSURE VAPOR
ROOM AIR CONITIONER
EVAPORATOR COILS CONDENSER COILS
CYCLE OF REFRIGERATION
CAPILLARY TUBE
COMPRESSOR
TURBO FAN
CONDENSER COIL
EVAPORATOR COIL
FAN
MOTOR
Figure 32

—18—
4.3 TROUBLESHOOTING GUIDE
In general, possible trouble is classified in two kinds.
The one is called Starting Failure which is caused from an electrical defect, and the other is ineffective Air
Conditioning caused by a defect in the refrigeration circuit and improper application.
Unit runs but poor cooling.
Ineffective Cooling
Check outdoor coil
(heat exchanger) & the fan
operation.
Check gas leakage.
Repair gas leak.
Replacement of unit if the
unit is beyond repair.
Satisfactory operation with
temperature difference of
inlet & outlet air ;
44~50°F(7~10°C)
Check heat load
increase.
Clean condenser.
Not on separate circuit.
Check inside gas
pressure.
Adjusting of refrigerant
charged.
Malfunction of compressor.
Replacement of
compressor.
Check cold air circulation
for smooth flow.
Dirty indoor coil
(Heat exchanger)
Correct above trouble
Check clogging in refrigera-
tion circuit.
Repair clogging in refrigera-
tion circuit.
Obstruction at air outlet
Clogged of air filter.
Malfunction of fan

—19—
Fails to Start
Check circuit breaker
and fuse.
Gas leakage of feeler bulb
of thermostat
Check of control switch.
Fan only fails to start.
Improper wiring.
Defect of fan motor
capacitor.
Irregular motor resistance
(
).
Irregular motor insulation
(
).
Replacement of fan motor.
Regular but fails to start.
Replacement of compressor
(locking of rotor, metal).
Improper thermostat setting.
Loose terminal connection.
Improper wiring.
Irregular motor resistance ( )
Irregular motor insulation ( )
Replacement of compressor
(Motor damaged)
Drop of power voltage.
Capacitor check.
Replacement
Compressor only fails to
start.
Defect of compressor
capacitor.
Check of power source.
Check of control switch
setting.

—20—
•Check the Fuse.
•Check the wiring diagram.
Is the Trans input power
AC 115V?
Is the Trans output power
about AC 14V? Is shorted the Trans. output?
Is output Voltage of IC01D
DC 12V?
Is output Voltage of IC02D
DC 5V?
Is the voltage No.18 of Micom
DC 5V?
Exchange AC PCB Ass'y.
Is the
connection between
AC and DC
all right?
Is the reset circuit all right?
(The No.14 of
Micom is 5V.)
•Check the Fuse.
•Check the wiring diagram.
•Check the Main
PCB pattern.
•Exchange the Trans.
•Exchange D02D~D05D.
•Exchange IC01D.
•Exchange IC02D.
•Exchange IC01A, C02A.
•Connect connector
exactly.
•Check the PCB
pattern.
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
NO
YES
■ELECTRICAL PARTS TROUBLESHOOTING GUIDE: LW8000PR
Possible Trouble 1 The unit does not operate.