Electrolux EXS12HC7WE User manual

Electrolux
Brand
Electrolux
Model
EXS12HC7WE
Category
Split-system air conditioners
Type
User manual

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Website: www.mideaaircon.com
Service manual
CAUTION
- BEFORE SERVICING THE UNIT, READ THE SAFETY
- PRECAUTIONS IN THIS MANUAL.
- ONLY FOR AUTHORIZED SERVICE PERSONNEL.
MODELS:
EL-KF20GW/N2Y-A(B) EL-KFR20GW/N2Y-A(B) EL-KF26GW/N2Y-A(B) EL-KFR26GW/N2Y-A(B)
EL-KF36GW/N2Y-A(B) EL-KFR36GW/N2Y-A(B) EL-KF50GW/N2Y-A(B) EL-KFR50GW/N2Y-A(B)
EL-KF61GW/N2Y-A(B) EL-KFR61GW/N2Y-A(B) EL-KF70GW/N2Y-A(B) EL-KFR70GW/N2Y-A(B)
EL-KFR20GW/N1Y-A(B) EL-KFR26GW/N1Y-A(B) EL-KFR36GW/N1Y-A(B)
EL-KF20GW/Y-A(B) EL-KFR20GW/Y-A(B) EL-KF26GW/Y-A(B) EL-KFR26GW/Y-A(B)
EL-KF32GW/Y-A(B) EL-KFR32GW/Y-A(B) EL-KF36GW/Y-A(B) EL-KFR36GW/Y-A(B)
EL-KF50GW/Y-A(B) EL-KFR50GW/Y-A(B) EL-KF61GW/Y-A(B) EL-KFR61GW/Y-A(B)
EL-KF70GW/Y-A(B) EL-KFR70GW/Y-A(B) EL-KF90GW/Y-A(B) EL-KFR90GW/Y-A(B)
EL-KF90GW/SY-A(B) EL-KFR90GW/SY-A(B) AU-KF61GW/Y-A(B) AU-KFR61GW/Y-A(B)
AU-KF70GW/Y-A(B) AU-KFR70GW/Y-A(B) AU-KF85GW/Y-A(B) AU-KFR85GW/Y-A(B)
EL1-KF20GW/Y-A(B) EL1-KFR20GW/Y-A(B) EL1-KF26GW/Y-A(B) EL1-KFR26GW/Y-A(B)
EL1-KF32GW/Y-A(B) EL1-KFR32GW/Y-A(B) EL1-KF20GW/N2Y-A(B) EL1-KFR20GW/N2Y-A(B)
EL1-KF26GW/N2Y-A(B) EL1-KFR26GW/N2Y-A(B) EL1-KF35GW/N2Y-A(B) EL1-KFR35GW/N2Y-A(B)
EL-KT3F53GW/Y-T2 EL-KT3F53GW/Y-T1 EL-KT3FR53GW/Y-T1
EL-KT3F70GW/Y-T2 EL-KT3F70GW/Y-T1 EL-KT3FR70GW/Y-T1
SEL-KF20GW/Y-A(B) SEL-KFR20GW/Y-A(B) SEL-KF26GW/Y-A(B) SEL-KFR26GW/Y-A(B)
SEL-KF32GW/Y-A(B) SEL-KFR32GW/Y-A(B) SEL-KF53GW/Y-A(B) SEL-KFR53GW/Y-A(B)
SEL-KF61GW/Y-A(B) SEL-KFR61GW/Y-A(B) SEL-KF70GW/Y-A(B) SEL-KFR70GW/Y-A(B)
SEL1-KF26GW/Y-A(B) SEL1-KFR26GW/Y-A(B) SEL1-KF36GW/Y-A(B) SEL1-KFR36GW/Y-A(B)
GD Midea Refrigerant Equipment Co. Ltd Service manual for Electrolux split Series
1
CONTENTS
1. PREFACE
1.1 SAFETY PRECAUTIONS........................................................................................................................1
1.2 INSULATION RESISTANCE TEST.........................................................................................................1
1.3 FEATURES...............................................................................................................................................2
1.4 CONTROL LOCATIONS.............................................................................................................................2
1.5 OUTSIDE DIMENSIONS............................................................................................................................3
2. INSTALLATION
2.1 TOOLS NEEDED FOR INSTALLATION....................................................................................................5
2.2 ITEMS REQUIRED FOR INSTALLING THE UNIT....................................................................................5
2.3 INSTALLATION OF INDOOR UNIT AND OUTDOOR UNIT .....................................................................6
2.4 FLARING WORK AND CONNECTION OF PIPING...................................................................................8
2.5 CONNECTING THE CABLE BETWEEN INDOOR UNIT AND OUTDOOR UNIT……………..................12
2.6 CHECKING THE DRAINAGE AND FORMING THE PIPING ...................................................................14
2.7 AIR PURGING...........................................................................................................................................15
2.8 TEST RUNNING .......................................................................................................................................17
3. TROUBLE SHOOTING GUIDE
3.1 Refrigeration Cycle Diagram.....................................................................................................................19
3.2 TROUBLE SHOOTING GUIDE..................................................................................................................20
4. WIRING DIAGRAM
4.1 Wiring diagram for indoor units……..........................................................................................................26
4.2 Wiring diagram for outdoor units...............................................................................................................32
5. EXPLODED VIEWS…………………………………………...........................................................................40
6 SPECIFICATIONS........................................................................................................................................40
7 SPARE PARTS LIST……………………………………………………..………….……………………………..40
8 MODEL CHECK LIST……………………………………………………………………………………………….40
1. PREFACE
This SERVICE MANUAL provides various servicing 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 POWER SWITCH to OFF and unplug the power cord.
2. Inspect the service cord for damage or wear.
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 resistance 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 lead between the two (2) live pins.
2. The grounding conductor (yellow/green) is to be open.
3. Measure the resistance value with an ohm meter between the jumped lead and each exposed metallic part
on the equipment at all the positions (except OFF) of the ROTARY SWITCH or POWER SWITCH.
4. The value should be over 1MΩ.
2
1.3 FEATURES
Error self diagnosis function.
Anti-icing function at cooling mode.
Anti-cold air function at heating mode.
Auto-defrosting and heating recovering function
at heating mode.
Outdoor unit overload current protection.
Temperature protection of the outdoor
compressor top.
Restart protection for the compressor.
24 hours on/off mode time setting.
Protection against over-load or too-low current
input through alternating current.
1.4 CONTROL LOCATIONS
For reverse cycle models:
T
I
M
E
R
P
O
W
E
R
A
U
T
O
℃
D
E
F
R
O
S
T
For cooling only models:
T
I
M
E
R
P
O
W
E
R
A
U
T
O
℃
AUTO
COOL
DRY
FAN
HIGH
MED
LOW
TEMP
MODE ON/OFF
FAN
SWING E CONOM Y
TIME R
RESET
LOCK
R
CANCEL
DIGITAL DISPLAY
HEAT
LED lamp:
POWER
AUTO
TIMER
DEFROST
Remote controller:
LCD display
Mode button: Select the operation mode, AUTO,
COOL, DRY, HEAT (Reverse cycle
models only) and FAN.
Fan speed button: Select the Fan speed, AUTO,
LOW, MED, HIGH.
ON/OFF button: Press this button to operation
the unit, again to stop.
Temperature setting up button: Press this
button to increase temperature
setting or adjust the TIMER in a
clockwise direction.
Temperature setting down button: Press this
button to decrease temperature
setting or adjust the TIMER in a
counter-clockwise direction.
Swing button: Press this button to activate the
auto swing, again to stop.
Economy button: Push this button to set the
economical operation mode.
Timer button: Press this button to set TIMER
ON and/or TIMER OFF.
Cancel button: Press this button to cancel
TIMER ON and TIMER OFF.
Lock button: Press this button to lock all button
except this button.
Reset button: Press this button to reset all
settings to original.
Digital display button: Press this button to
activate/eliminate the digital
temperature display on the indoor
unit.
GD Midea Refrigerant Equipment Co. Ltd Service manual for Electrolux split Series
3
1.5 OUTSIDE DIMENSIONS
1.5.1 Indoor units:
A: width (mm) B: Depth (mm) C: Height (mm)
Unit A(mm) B(mm) C(mm) D(mm)
Size A 210 750 250 214
Size B 213 815 282 217
Size C 228 1000 298 232
Size D 240 1080 330 245
Size E 230 1250 325 230
Model list:
Size A indoor units:
Size B indoor units:
Size C indoor units:
Size D indoor units:
EL-KF61GW/N2Y-A(B) EL-KFR61GW/N2Y-A(B)
EL-KF70GW/N2Y-A(B) EL-KFR70GW/N2Y-A(B)
EL-KF61GW/Y-A(B) EL-KFR61GW/Y-A(B)
EL-KF70GW/Y-A(B) EL-KFR70GW/Y-A(B)
AU-KF61GW/Y-A(B) AU-KFR61GW/Y-A(B)
AU-KF70GW/Y-A(B) AU-KFR70GW/Y-A(B)
EL-KT3F70GW/Y-T2
EL-KT3F70GW/Y-T1 EL-KT3FR70GW/Y-T1
SEL-KF61GW/Y-A(B) SEL-KFR61GW/Y-A(B)
SEL-KF70GW/Y-A(B) SEL-KFR70GW/Y-A(B)
Size E indoor units:
1.5.2 Installation plate
For Size A indoor unit:
750
45
250
Right refrigerant
pipe hole D65
Installation plate
Indoor unit outline
Left refrigerant
pipe hole D65
150mm or more to c eiling
120mm or more
to wall
120mm or more
to wall
For Size B indoor unit:
Indoor unit outline
120mm or more
to wall
120mm or more
to wall
Left refrigerant
pipe hole D65
Right refrigerant
pipe hole D65
Installation plate
280
815
150mm or more to ceiling
50
50
For Size C indoor unit:
50
1000
49
90
55
50
Righ t pipe
hole D 65
120mm or more
to the wall
Indoor unit outline
Installation plate
150mm or more to the ceiling
Left pipe
hole D65
120mm or more
to the wall
EL-KF20GW/N2Y-A(B) EL-KFR20GW/N2Y-A(B)
EL-KF26GW/N2Y-A(B) EL-KFR26GW/N2Y-A(B)
EL-KFR20GW/N1Y-A(B) EL-KFR26GW/N1Y-A(B)
EL-KF20GW/Y-A(B) EL-KFR20GW/Y-A(B)
EL-KF26GW/Y-A(B) EL-KFR26GW/Y-A(B)
EL-KF32GW/Y-A(B) EL-KFR32GW/Y-A(B)
EL1-KF20GW/Y-A(B) EL1-KFR20GW/Y-A(B)
EL1-KF26GW/Y-A(B) EL1-KFR26GW/Y-A(B)
EL1-KF32GW/Y-A(B) EL1-KFR32GW/Y-A(B)
EL1-KF20GW/N2Y-A(B) EL1-KFR20GW/N2Y-A(B)
EL1-KF26GW/N2Y-A(B) EL1-KFR26GW/N2Y-A(B)
SEL-KF20GW/Y-A(B) SEL-KFR20GW/Y-A(B)
SEL-KF26GW/Y-A(B) SEL-KFR26GW/Y-A(B)
SEL-KF32GW/Y-A(B) SEL-KFR32GW/Y-A(B)
SEL1-KF26GW/Y-A(B) SEL1-KFR26GW/Y-A(B)
EL-KF36GW/N2Y-A(B) EL-KFR36GW/N2Y-A(B)
EL-KFR36GW/N1Y-A(B)
EL-KF36GW/Y-A(B) EL-KFR36GW/Y-A(B)
EL1-KF35GW/N2Y-A(B) EL1-KFR35GW/N2Y-A(B)
SEL1-KF36GW/Y-A(B) SEL1-KFR36GW/Y-A(B)
EL-KF50GW/N2Y-A(B) EL-KFR50GW/N2Y-A(B)
EL-KF50GW/Y-A(B) EL-KFR50GW/Y-A(B)
EL-KT3F53GW/Y-T2
EL-KT3F53GW/Y-T1 EL-KT3FR53GW/Y-T1
SEL-KF53GW/Y-A(B) SEL-KFR53GW/Y-A(B)
EL-KF90GW/Y-A(B) EL-KFR90GW/Y-A(B)
EL-KF90GW/SY-A(B) EL-KFR90GW/SY-A(B)
AU-KF85GW/Y-A(B) AU-KFR85GW/Y-A(B)
GD Midea Refrigerant Equipment Co. Ltd Service manual for Electrolux split Series
4
For Size D indoor unit:
150 or more to the ceiling
Hooked Part
Indoor Unit Outline
Hooked Part
Left Pipe
hole D95
120mm or more to
the wall
432
58
465
465
11 5
50
Right pipe
hole D95
5850
115
Hooked Part
432
1080
120mm or more to
the wall
108
22
For Size E indoor unit:
150mm or more to the ceiling
1250
81 5
257
178
Ho oked Part
Hooker Part
120mm or more
to the wall
120mm or more
to the wall
325
55
55
55
58
Left pipe
hole D95
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D
9
5
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1.5.3 Outdoor units:
A: Depth (mm) B: Width (mm) C: Height (mm)
Unit Size F Size G Size H Size I Size J
A(mm) 235 250 285 335 330
B(mm) 700 780 760 845 895
C(mm) 535 540 590 695 860
D(mm) 275 298 315 360 355
E(mm) 120 114.5 110 140 141.3
F(mm) 458 549 530 560 589.6
Size F outdoor units:
EL-KF20GW/N2Y-A(B) EL-KFR20GW/N2Y-A(B)
EL-KF26GW/N2Y-A(B) EL-KFR26GW/N2Y-A(B)
EL-KFR20GW/N1Y-A(B)
EL-KF20GW/Y-A(B) EL-KFR20GW/Y-A(B)
EL-KF26GW/Y-A(B) EL-KFR26GW/Y-A(B)
EL1-KF20GW/Y-A(B) EL1-KFR20GW/Y-A(B)
EL1-KF26GW/Y-A(B) EL1-KFR26GW/Y-A(B)
EL1-KF20GW/N2Y-A(B) EL1-KFR20GW/N2Y-A(B)
EL1-KF26GW/N2Y-A(B) EL1-KFR26GW/N2Y-A(B)
SEL-KF20GW/Y-A(B) SEL-KFR20GW/Y-A(B)
SEL-KF26GW/Y-A(B) SEL-KFR26GW/Y-A(B)
Size G outdoor units:
EL-KFR26GW/N1Y-A(B) EL-KFR36GW/N1Y-A(B)
EL-KF32GW/Y-A(B) EL-KFR32GW/Y-A(B)
EL-KF36GW/Y-A(B) EL-KFR36GW/Y-A(B)
EL1-KF32GW/Y-A(B) EL1-KFR32GW/Y-A(B)
EL1-KF35GW/N2Y-A(B) EL1-KFR35GW/N2Y-A(B)
SEL-KF32GW/Y-A(B) SEL-KFR32GW/Y-A(B)
SEL1-KF26GW/Y-A(B) SEL1-KFR26GW/Y-A(B)
Size H outdoor units:
EL-KF36GW/N2Y-A(B) EL-KFR36GW/N2Y-A(B)
SEL1-KF36GW/Y-A(B) SEL1-KFR36GW/Y-A(B)
Size I outdoor units:
EL-KF50GW/N2Y-A(B) EL-KFR50GW/N2Y-A(B)
EL-KF61GW/N2Y-A(B) EL-KFR61GW/N2Y-A(B)
EL-KF70GW/N2Y-A(B) EL-KFR70GW/N2Y-A(B)
EL-KF50GW/Y-A(B) EL-KFR50GW/Y-A(B)
EL-KF61GW/Y-A(B) EL-KFR61GW/Y-A(B)
EL-KF70GW/Y-A(B) EL-KFR70GW/Y-A(B)
AU-KF61GW/Y-A(B) AU-KFR61GW/Y-A(B)
AU-KF70GW/Y-A(B) AU-KFR70GW/Y-A(B)
EL-KT3F53GW/Y-T2
EL-KT3F53GW/Y-T1 EL-KT3FR53GW/Y-T1
EL-KT3F70GW/Y-T1 EL-KT3FR70GW/Y-T1
SEL-KF53GW/Y-A(B) SEL-KFR53GW/Y-A(B)
SEL-KF61GW/Y-A(B) SEL-KFR61GW/Y-A(B)
SEL-KF70GW/Y-A(B) SEL-KFR70GW/Y-A(B)
Size J outdoor units:
EL-KF90GW/Y-A(B) EL-KFR90GW/Y-A(B)
EL-KF90GW/SY-A(B) EL-KFR90GW/SY-A(B)
AU-KF85GW/Y-A(B) AU-KFR85GW/Y-A(B)
EL-KT3F70GW/Y-T2
GD Midea Refrigerant Equipment Co. Ltd Service manual for Electrolux split Series
5
2 INSTALLATION
2.1 TOOLS NEEDED FOR INSTALLATION
Level gauge
Screwdriver
Electric drill
Hole core drill ( φ85mm or φ115mm depending
on Model)
Flaring tool set
Specified torque wrenches: 1.8kgm, 4.2kgm,
5.5kgm, 6.6kgm (Vary depending on model
No.)
Spanner (half union)
A glass of water
Hexagonal wrench (4mm)
Gas-leak detector
Vacuum pump
Gauge manifold
User’s manual
Thermometer
2.2 ITEMS REQUIRED FOR INSTALLING THE
UNIT
No. Name of Accessories Quantity
1 Installation Plate 1
2 Self-tapping Screw ST3.9x25
(Type “A”)
8
3 Plastic Expansion Sheath 8
4 Drain Joint 1
5 Wrapping Tape
6 Connection Pipe Assembly
(Detail in below table)
7 Connecting Cable
8 Additional Drain Pipe (Outer
Diameter15.5mm)
9 Insulation Materials
10 Cable Tie (5~10)
Parts
purchased
separately
11 Remote Control Holder 1
12 Self-tapping Screw ST2.9x10
(Type “B”)
2
13 Remote Control 1
Note: Excluding the parts that are provided with
the unit detailed above all other parts must be
purchased separately.
Connection Pipe Assembly
model Liquid side pipe Gas side pipe
7,000Btu/h
9,000Btu/h
6.35mm
1/4”
9.53mm
3/8”
12,000Btu/h
18,000Btu/h
6.35mm
1/4”
12.7mm
1/2”
21,000Btu/h
24,000Btu/h
30,000Btu/h
9.53mm
3/8”
16mm
5/8”
NOTE: For pipes used on R410A system, the
wall thickness of the pipes should be
no less than 0.7mm. Otherwise, the
pipes may be broken when using.
GD Midea Refrigerant Equipment Co. Ltd Service manual for Electrolux split Series
6
Typical installation
CAUTIONS:
1. Ensure that the space around the left and
right of the indoor unit is more than 12cm.
2. The indoor unit should be installed allowing a
minimum clearance of 15cm from the ceiling.
3. Use a stud finder to locate studs to prevent
unnecessary damage to the wall.
4. For optimum performance the Indoor Unit
should be installed on the wall in areas where
the height from the floor to the ceiling is not
more than 2.3 meters.
5. A minimum pipe run of 3 meters is required to
minimize vibration & excessive noise.
6. The indoor unit should be installed on the wall
at a height of 1.7 meters or more from the
floor but less than 2.3 meters from the floor.
7. Directions A, B and C should be free from
obstructions.
2.3 INSTALLATION OF INDOOR UNIT AND
OUTDOOR
2.3.1 Indoor unit
● Do not expose the indoor unit to heat or
steam.
● Select a place where there are no obstacles in
front or around the unit.
● Make sure that condensation drainage can be
conveniently routed away.
● Do not install near a doorway.
● Ensure that the space on the left and right of
the unit is more than 12cm.
● Use a stud finder to locate studs to prevent
unnecessary damage to the wall.
● For optimum performance the indoor unit
should be installed on the wall in areas where the
height from the floor to the ceiling is not more than
2.3 meters.
● A minimum pipe run of 3 meters is required to
minimize vibration & excessive noise.
● The indoor unit should be installed on the wall
at a height of 1.7 meters or more from the floor but
less than 2.3 meters from the floor.
● The indoor unit should be installed allowing a
minimum clearance of 15cm from the ceiling.
● Any variations in pipe length will/may require
adjustment to refrigerant charge (Refer to item
2.3.3).
M
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1
.
7
m
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s
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2
.
3
m
Mo
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1
5
c
m
More than 12cm
More than 12cm
2.3.2 Outdoor unit
● If an awning is built over the outdoor unit to
prevent direct sunlight or rain exposure, make
sure that heat radiation from the condenser is not
restricted.
GD Midea Refrigerant Equipment Co. Ltd Service manual for Electrolux split Series
7
● Ensure that the clearance around the back of
the unit is more than 20cm and left side is more
than 10cm.
● The front of the unit should have more than
100cm of clearance and the connection side (right
side) should have more than 60cm of clearance.
● Do not place animals and plants in the path of
the air inlet or outlet.
● Take the air conditioner weight into account
and select a place where noise and vibration will
not be an issue.
● Select a place so that the warm air and noise
from the air conditioner do not disturb neighbors.
Mo
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2
0
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Mo
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6
0
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1
0
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1
0
0
c
m
Rooftop installation:
● If the outdoor unit is installed on a roof
structure, be sure to level the unit.
● Ensure the roof structure and anchoring
method are adequate for the unit location.
● Consult local codes regarding to rooftop
mounting.
● If the outdoor unit is installed on roof
structures or external walls, this may result in
excessive noise and vibration, and may also be
classed as a non serviceable installation.
2.3.3 Piping length and elevation
GAS
3/8”
9.53mm
1/2”
12.7mm
5/8”
16.0mm
Piping
LIQUID
1/4”
6.35mm
1/4”
6.35mm
3/8”
9.53mm
Standard Length(m) 5 5 5
Max. Elevation B (m) 5 5 5
Max. Length A (m) 10 10 10
Additional
Refrigerant (g/m)
30 30 65
Cautions:
● Capacity is based on standard length and
maximum allowance length is on the basis of
reliability.
● Oil trap should be installed every 5~7 meters.
● When the connecting pipe is longer than 5
meters, Additional refrigerant should be added
into the unit according to the above table through
the service port on the “LO” valve on outdoor unit.
2.3.4 Fitting the installation plate
Fit the Installation Plate and drill holes in the wall
according to the wall structure and corresponding
mounting points on the installation plate.
1. Fit the installation plate horizontally on
structural parts of the wall with spaces around the
installation plate (Detailed on page 3 as
applicable).
2. If the wall is made of brick, concrete or the like,
drill eight (8) 5mm diameter holes in the wall.
Insert Plastic Expansion Sheath for appropriate
mounting screws.
3. Fit the installation plate on the wall with eight (8)
type “A” screws.
2.3.5 Drill a hole in the wall
1. Determine hole positions according to the
diagram detailed on page 3 as applicable. Drill
one (1) hole (φ85mm for those models need
φ65mm pipe hole or φ115mm for models need
φ95mm pipe hole) slanting slightly to outdoor
GD Midea Refrigerant Equipment Co. Ltd Service manual for Electrolux split Series
8
side.
2. Always use wall hole
conduit when drilling
metal grid, metal plate
or the like.
2.4 FLARING WORK AND CONNECTION OF
PIPING
The main cause for gas leakage is due to defects
in flaring work. Carry out correct flaring work using
the following procedure.
2.4.1 Flaring work
2.4.1.1 Cut the pipes and the cable.
● Use the piping kit accessory (if applicable) or
the pipes purchased locally.
● Measure the distance between the indoor and
the outdoor unit.
● Cut the pipes a little longer than measured
distance.
● Cut the cable 1.5m longer than the pipe
length.
2.4.1.2 Burrs removal
● Completely remove all burrs from the cut cross
section of pipe/tube.
● Place the end of the copper tube/pipe in a
downward direction as you remove burrs in order
to avoid dropping burrs into the tubing.
2.4.1.3 Putting flare nut on
● Remove flare nuts attached to indoor and
outdoor unit, then put them on pipe/tube having
completed burr removal.
(Note: It is not possible to put them on after flaring
work.)
2.4.1.4 Flaring work
● Carry out flaring work using flaring tool as
shown below.
“A” (mm)
Out diameter
Max. Min.
1/4” (6.35mm) 1.3 0.7
3/8” (9.53mm) 1.6 1.0
1/2” (12.7mm) 1.8 1.0
5/8” (16.0mm) 2.4 1.8
Hold copper pipe firmly in a die according to the
dimension shown in the table above.
2.4.1.5 Check
● Compare the flared work with the adjacent
diagram.
● If flare is found to be defective, cut off the
flared section and do flaring work again.
2.4.2 Connection of pipes - Indoor
● Prepare the indoor unit’s piping and drain hose
for installation through the wall.
● Remove the tubing retainer (see illustration
right) and pull the tubing and drain hose away
from chassis (If required). For some models this is
not needed.
Replace the tubing retainer in its original position.
CAUTION
When installing the indoor unit, be sure to remove
the relevant sections where required (see
GD Midea Refrigerant Equipment Co. Ltd Service manual for Electrolux split Series
9
adjacent diagram for example). This will allow
piping and cable routing to be completed without
damaging the unit.
2.4.2.1 For rear right piping
Note: When viewed from the front of the indoor
unit.
2.4.2.1.1 Route the indoor tubing and the drain
hose in the direction of rear right.
2.4.2.1.2 Insert the connecting cable into the
indoor unit from the outdoor unit through the
piping hole.
● Do not connect the cable to the indoor unit.
● Make a small loop with the cable for easy
connection later.
2.4.2.1.3 Tape the tubing, drain hose and the
connecting cable. Be sure that the drain hose is
located at the lowest side of the bundle. Locating
at the upper side can cause drain pan to overflow
inside the unit.
Note: If the drain hose is routed inside the room,
insulate the hose with an insulation material so
that dripping from "sweating" (condensation) will
not damage furniture or floors.
*Foamed polyethylene or equivalent is
recommended.
2.4.2.1.4 Insert the piping, drain hose and the
connecting cable into the piping hole.
2.4.2.1.5 Set the piping and the drain hose to the
back of the chassis with the tubing holder.
● Set the tubing retainer into position and tighten
screw.
2.4.2.1.6 Locating the indoor unit
● Hook the indoor unit onto the upper portion of
the installation plate (Engage the hooks of the
installation plate into the openings at the rear
top of the indoor unit). Ensure that the hooks are
properly seated on the installation plate by moving
the indoor unit left and right.
● Press the lower left and right sides of the unit
against the installation plate until the hooks
engage into their slots (clicking sound).
2.4.2.1.7 Connecting the piping to the indoor unit
and the drain hose to drain pipe.
● Align the centre of the piping and sufficiently
tighten the flare nut by hand.
● Tighten the flare nut with a wrench, in
accordance with the following table.
Outside
Diameter
Tightening
Torque
(Kg.m)
Additional
Tightening
Torque (Kg.m)
1/4” (6.35mm) 1.6 2.0
3/8” (9.53mm) 3.0 3.5
1/2” (12.7mm) 5.0 5.5
5/8” (16.0mm) 7.5 8.5
● When extending the drain hose of the indoor
unit, install the drain pipe extension as shown in
GD Midea Refrigerant Equipment Co. Ltd Service manual for Electrolux split Series
10
adjacent diagram.
2.4.2.1.8 Wrap the insulation material around the
connecting portion.
● Overlap the connection pipe heat insulation
and the indoor unit pipe heat insulation material.
Bind them together with vinyl tape so that there is
no gap.
● Wrap the area which accommodates the rear
piping housing section with vinyl tape.
● Bundle the piping and drain hose together by
wrapping them with vinyl tape over the range
within which they fit into the rear piping housing
section.
2.4.2.2 For rear left piping
Note: When viewed from the front of the indoor
unit.
2.4.2.2.1 Route the indoor tubing and the drain
hose to the required piping hole position in the
direction of left.
2.4.2.2.2 Insert the connecting cable into the
indoor unit from the outdoor unit through the
piping hole.
● Do not connect the cable to the indoor unit.
● Make a small loop with the cable for easy
connection later.
2.4.2.2.3 Tape the drain hose and the connecting
cable. Be sure that the drain hose is located at the
lowest side of the bundle. Locating at the upper
side can cause drain pan to overflow inside the
unit.
Note: If the drain hose is routed inside the room,
insulate the hose with an insulation material so
that dripping from "sweating" (condensation) will
not damage furniture or floors.
*Foamed polyethylene or equivalent is
recommended.
2.4.2.2.4 Insert the piping, drain hose and the
connecting cable into the piping hole.
2.4.2.2.5 Indoor unit installation
● Hang the indoor unit from the hooks at the top
of the installation plate.
● Insert a spacer between the indoor unit and
the installation plate to separate the bottom of the
indoor unit from the wall.
2.4.2.2.6 Connecting the piping to the indoor unit
and the drain hose to drain pipe.
● Align the centre of the piping and sufficiently
tighten the flare nut by hand.
GD Midea Refrigerant Equipment Co. Ltd Service manual for Electrolux split Series
11
● Tighten the flare nut with a wrench, in
accordance with the following table.
Outside
Diameter
Tightening
Torque
(Kg.m)
Additional
Tightening
Torque (Kg.m)
1/4” (6.35mm) 1.6 2.0
3/8” (9.53mm) 3.0 3.5
1/2” (12.7mm) 5.0 5.5
5/8” (16.0mm) 7.5 8.5
● When extending the drain hose of the indoor
unit, install the drain pipe extension as shown in
adjacent diagram.
2.4.2.2.7 Wrap the insulation material around the
piping connections.
● Overlap the connection pipe heat insulation
and the indoor unit pipe heat insulation
material. Bind them together with vinyl tape
so that there is no gap.
● Wrap the area which accommodates the rear
piping housing section with vinyl tape.
● Bundle the piping and drain hose together by
wrapping them with vinyl tape over the range
within which they fit into the rear piping
housing section.
2.4.2.2.8 Set the piping and the drain hose to the
back of the chassis with the tubing holder.
● Set the tubing retainer into position and
tighten screw.
2.4.2.2.9 Reroute the piping and the drain hose
across the back of the chassis, for rear left side
external passage.
Pi ping f or pas sa ge
through piping hole
2.4.2.2.10 Locating the indoor unit
● Remove the spacer.
● Hook the indoor unit onto the upper portion of
the installation plate.
(Engage the two hooks of the installation plate
into the openings at the rear top of the indoor unit.)
● Ensure that the hooks are properly seated on
the installation plate by moving the indoor unit left
and right.
● Press the lower left and right sides of the unit
against the installation plate until the hooks
engage into their slots (clicking sound).
2.4.3 Connection of pipes - outdoor
2.4.3.1 Align the centre of the piping and
GD Midea Refrigerant Equipment Co. Ltd Service manual for Electrolux split Series
12
sufficiently tighten the flare nut by hand.
2.4.3.2 Finally, tighten the flare nut with torque
wrench until the wrench clicks.
● Tighten the flare nut with a wrench, in
accordance with the following table.
Outside
Diameter
Tightening
Torque
(Kg.m)
Additional
Tightening
Torque (Kg.m)
1/4” (6.35mm) 1.6 2.0
3/8” (9.53mm) 3.0 3.5
1/2” (12.7mm) 5.0 5.5
5/8” (16.0mm) 7.5 8.5
2.5 CONNECTING THE CABLE BETWEEN
INDOOR UNIT AND OUTDOOR UNIT
Max. current
(A)
Circuit Breaker /
Fuse Rating (A)
Wire Size
(mm
2
)
<=8 10 >=1.0
>8 & <=12.5 16 >=1.5
>12.5 & <=16 20 >=2.5
>16 & <=25 32 >=4.0
>25 & <=32 40 >=6.0
Max. current (A): Detail in SPECIFICATIONS list.
Note: To be used as a guide only.
2.5.1 Connect the cable to the indoor unit
● Connect the cable to the indoor unit by
connecting the wires to the terminals on the
control box individually according to the outdoor
unit connection. (Refer to Wiring diagram.)
(Ensure that the color of the wires of the outdoor
unit and the terminal number are the same as
CAUTION
Ensure that all electrical work complies with
relevant Standards and Supply Authority
Service Rules.
An individual branch Circuit Breaker/Fuse must
be used with this Air Conditioner. See the
table following for electrical requirements.
Notes:
● Power Source and Power Cord
specifications must comply with requirements
following.
● Circuit Breaker or Fuse specified in this
manual must be installed in the power supply
circuit.
● For your safety and protection, this unit is
earthed through the power cord plug when
plugged into a matching wall receptacle.
● Do not connect two power cords together to
supply power to the air conditioner.
● Do not extend the power cable conductors
by cutting.
● Power supply should be in the range of
90%~110% of rated voltage.
● Refer to the attached Electrical Connection
Diagram located on the panel of the outdoor
unit to connect the wire.
GD Midea Refrigerant Equipment Co. Ltd Service manual for Electrolux split Series
13
those of the indoor unit.)
1. Lift the front panel up and remove the
window cover from the indoor unit by
loosening the screw.
2. Connect wires to the Indoor Unit terminals
from the Outdoor Unit as identified by their
colors.
3. Secure the cable with the cord clamp.
4. Wrap wires (conductors) that were not
connected with insulating tape so that they do
not touch any electrical or metal parts.
Notes:
Wrong wire connection may cause some
electrical parts to malfunction.
The length of the power supply cord should
be at least 1.8m measured from the power
supply cord entry of the cabinet to the middle
of the live pin of the plug.
2.5.2 Connect the cable to the outdoor unit
2.5.2.1 Remove the control cover from the unit by
loosening the screw. Connect the wires to the
terminals on the control board individually.
2.5.2.2 Secure the cable onto the control board
with the cord clamp.
2.5.2.3 Re-fix the control cover to the original
position with the screw.
2.5.2.4 Use a recognized circuit breaker (Refer to
table on page 11.) between the power source and
the unit. An isolation device to adequately
disconnect all supply lines must be fitted.
CAUTIONS:
After confirming the above conditions, prepare the
wiring as follows:
1) Never fail to have an individual power circuit
specifically for the air conditioner. As for the
method of wiring, be guided by the circuit
diagram posted on the inside of control cover.
2) The screws which fasten the wiring in the
casing of electrical fittings may come loose
from vibrations to which the unit is subjected
during the course of transportation. Check
them and make sure that they are all tightly
fastened. If they are loose, it could cause
burn-out of the wires.
3) Specification of power source.
4) Confirm that electrical capacity of the
installation is sufficient.
5) Ensure that the starting voltage is maintained
at more than 90 percent of the rated voltage
marked on the name plate.
6) Confirm that the cable thickness is as
specified in the power source specification.
Particularly note the relation between cable
length and thickness. (Refer to page 11.)
7) Always install a Residual Current Device
(RCD) in wet or moist area.
8) The following may be caused by voltage drop.
Vibration of a contactor, which will damage
the contact point, fuse blowing, disturbance of
the normal function of the overload.
9) The means for disconnection from a power
supply shall be incorporated in the fixed
wiring and have an air gap contact separation
of at least 3mm in each active (phase)
conductor.
If a power plug is not to be used, provide a Circuit
Breaker/Fuse between power source and the unit
as shown in adjacent diagram.
GD Midea Refrigerant Equipment Co. Ltd Service manual for Electrolux split Series
14
2.6 CHECKING THE DRAINAGE AND
FORMING THE PIPE
2.6.1 Checking the drainage
2.6.1.1 To remove the front panel from the indoor
unit.
● Pull the lower left and right sides of the grille
toward you and lift it up.
2.6.1.2 To check the drainage.
● Pour a glass of water on the evaporator.
● Ensure the water flows through the drain hose
of the indoor unit without any leakage and goes
out the drain exit.
2.6.1.3 Drain piping
● The drain hose should point downward for
easy drain flow.
● Do not make drain piping similar to diagrams
shown below.
2.6.2 Form the piping
2.6.2.1 Form the piping by wrapping the
connecting portion of the indoor unit with
insulation material and secure it with narrow vinyl
tape and wide vinyl tape.
● If you want to connect an additional drain hose,
the end of the drain outlet should be routed above
the ground. Secure the drain hose appropriately.
2.6.2.2 In cases where the outdoor unit is installed
below the indoor unit perform the following.
● Tape the piping, drain hose and connecting
cable from down to up.
● Secure the tapped piping along the exterior
wall using saddle or equivalent.
2.6.2.3 In cases where the outdoor unit is installed
above the indoor unit perform the following.
Tape the piping and connecting cable from down
to up.
Secure the taped piping along the exterior wall.
Form a trap to prevent water entering the room.
Fix the piping onto the wall by saddle or
equivalent.
GD Midea Refrigerant Equipment Co. Ltd Service manual for Electrolux split Series
15
2.7 AIR PURGING
2.7.1 Air purging
Air and moisture remaining in the refrigerant
system have undesirable effects as indicated
below.
● Pressure in the system rises.
● Operating current rises.
● Cooling (or heating if applicable) efficiency
drops.
● Moisture in the refrigerant circuit may freeze
and block capillary tubing.
● Water may lead to corrosion of parts in the
refrigeration system.
Therefore, the indoor unit and tubing between the
indoor and outdoor unit must be leak tested and
evacuated to remove any non-condensable
substance and moisture from the system.
2.7.2 Air purging with vacuum pump
2.7.2.1 Preparation
● Check that each tube (both liquid and gas side
tubes) between the indoor and outdoor units have
been properly connected and all wiring for the test
run has been completed. Remove the service
valve caps from both the gas and the liquid side
on the outdoor unit. Note that both the liquid and
the gas side service valves on the outdoor unit are
kept closed at this stage.
2.7.2.2 Leak test
● Connect the manifold set (with pressure
gauges) and dry nitrogen gas cylinder to this
service port with charge hoses.
● Pressurizes the system to no more than 1MPa
(Approx. 145psi) with dry nitrogen gas and close
the cylinder valve when the gauge reading
reaches 1MPa (Approx. 145psi). Next, test for
leaks with liquid soap.
Lo Hi
Indoor unit
Outdoor unit
Manifold set
Pressure
gauge
Charge hose
Nitrogen gas
cylinder (in vertical
standing position)
● Do a leak test of all joints of the tubing (both
indoor and outdoor) and both gas and liquid side
service valves. Bubbles indicate a leak. Be sure to
wipe off the soap with a clean cloth.
● After the system is found to be free of leaks,
relieve the nitrogen pressure by loosening the
charge hose connector at the nitrogen
cylinder. When the system pressure is
reduced to normal, disconnect the hose from
the cylinder.
Gas leak check
1. Apply a soap water or a liquid neutral detergent
CAUTION
To avoid nitrogen entering the refrigerant
system in a liquid state, the top of the cylinder
must be higher than its bottom then you
pressurise the system. Usually, the cylinder is
used in a vertical standing position.
CAUTION
Be sure to use a manifold set for air purging. If it
is not available, use a stop valve for this
purpose. The "Hi" knob of the manifold valve
must always be kept closed.
GD Midea Refrigerant Equipment Co. Ltd Service manual for Electrolux split Series
16
on the indoor unit connection or outdoor unit
connections using a soft brush to check for
leakage of the connecting points of the piping.
2. If bubbles come out, the pipes have leakage.
Note:
A: Lo stop valve
B: Hi stop valve
C and D: connections to the indoor unit.
2.7.2.3 Evacuation
● Connect the charge hose end described in the
preceding steps to the vacuum pump to evacuate
the tubing and indoor unit. Confirm the "LO" knob
of the manifold set is open. Then run the vacuum
pump. The operation time for evacuation varies
with tubing length and capacity of the pump. The
following table is a guide for evacuation times.
Times are dependent on tubing length and pump
capacity.
Pipe Length (L)
Air Purge
Method
Timer required
(min)
<5m
Use Vacuum
Pump
25
5~10m
Use Vacuum
Pump
30
● When the desired vacuum is reached, close
the "LO" knob of the manifold set and stop the
vacuum pump.
Indoor unit
Outdoor unit
Manifold set
Pressure
gauge
Vacu um pump
Open
Close
2.7.2.4 Finishing the job
● With a service valve wrench, turn the valve
stem of liquid side valve counter-clockwise to fully
open the valve.
● Turn the valve stem of gas side valve
counter-clockwise to fully open the valve.
● Loosen the charge hose connected to the gas
side service port slightly to release the pressure,
then remove the hose.
● Replace the valve cap on the gas side service
port and fasten the cap securely.
● This process is very important to prevent
leakage from the system.
● Replace the valve caps at both gas and liquid
side service valves and fasten them tightly.
● This completes air purging with a vacuum
pump. The air conditioner is now ready to test run.
GD Midea Refrigerant Equipment Co. Ltd Service manual for Electrolux split Series
17
2.8 TEST RUNNING
1. Check that all tubing and wiring have been
properly connected.
2. Check that the gas and liquid side service
valves are fully open.
2.8.1 Settlement of outdoor unit
● Anchor the outdoor unit with a bolt and nut
(φ10mm) tightly and horizontally on a concrete or
rigid mount.
● When installing on a wall, roof or rooftop,
anchor the mounting base securely.
● In the case when the vibration of the unit is
conveyed to the connecting pipes, secure the unit
with an anti-vibration mount.
2.8.2 Prepare remote control
Notes:
● There are two methods to test the unit using
either the remote control or using the switch on
the indoor unit.
● It is recommended that you test the unit using
the switch on the indoor unit.
To use the remote control for test running, operate
as per the following instruction.
To use the switch on the indoor unit for test
running, skip the following instructions and move
to item “2.8.3”.
Prepare remote control
The remote control uses two alkaline dry cell
batteries (2 X AAA 1.5Volt).
(1) Slide the cover of the battery compartment (on
the rear of the remote control) off.
(2) Insert new batteries, making sure that the (+)
and (-) of battery are installed correctly.
(3) Slide the battery compartment cover back on.
NOTES:
● Always use 2 x AAA (1.5Volt) batteries. Do not
use rechargeable batteries.
● Remove the batteries from the remote control
if the system is not going to be used for a long
period.
2.8.3 Operating the unit with the switch on the
indoor unit
1. Open and lift the front panel up to angle until it
remains fixed with a clicking sound.
2. Press the AUTO/COOL button twice (For Size
A and Size B indoor units) or COOL button once
(For Size C indoor units) or Manual button twice
(For Size D and Size E indoor units), the unit will
work on test mode for cooling (Refer to page 3).
Note:
Cooling test mode running can only continue for
30 minutes. After this time it will automatically
change into AUTO mode with setting temperature
at 24
o
C.
If using the Remote Control for test running, set it
in COOL mode (Refer to User Manual). The unit
will not change into AUTO mode automatically. If
the ambient temperature is too low, the unit
cannot perform test running on COOL mode.
2.8.4 Evaluation of performance
Operate unit for 15~20 minutes, then check the
system refrigerant charge:
1. Measure the pressure of the gas side service
valve.
2. Measure the temperature of the intake and
discharge of air.
GD Midea Refrigerant Equipment Co. Ltd Service manual for Electrolux split Series
18
3. Ensure the difference between the intake
temperature and the discharge is more than 8
o
C.
4. For reference: the gas side pressure of
optimum condition is as detailed (Cooling).
Outside ambient
TEMP.
The pressure of the
gas side service valve
35
o
C(95
o
F)
4~5kg/cm
2
(400~490KPa)
NOTE:
If the actual pressure is higher than shown, the
system is most likely overcharged, and charge
should be reduced.
If the actual pressure is lower than shown, the
system is most likely undercharged, and charge
should be added.
The air conditioner is now ready for use.
PUMP DOWN
This is performed when the unit is to be relocated
or the refrigerant circuit is serviced.
Pump Down means collecting all refrigerant in the
outdoor unit without loss of refrigerant gas.
CAUTION:
Be sure to perform Pump Down procedure with
the unit in cooling mode.
Pump Down Procedure
1. Connect a low-pressure gauge manifold hose
to the charge port on the gas side service valve.
2. Open the gas side service valve halfway and
purge the air from the manifold hose using the
refrigerant gas.
3. Close the liquid side service valve (all the way
in).
4. Turn on the unit's operating switch and start the
cooling operation.
5. When the low-pressure gauge reading
becomes 1 to 0.5kg/cm
2
(100~50kPa), fully close
the gas side valve stem and then quickly turn off
the unit.
At this time Pump Down has been completed and
all refrigerant gas will have been collected in the
outdoor unit.
19
3 TROUBLESHOOTING GUIDE
3.1 REFRIGERATION CYCLE DIAGRAM
For Reverse Cycle Type
For Cooling Only Type
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Electrolux EXS12HC7WE User manual

Electrolux
Brand
Electrolux
Model
EXS12HC7WE
Category
Split-system air conditioners
Type
User manual
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