AEG-Electrolux EXP12EL1WI, EXP09CL1WI User Manual
Website: www.mideaaircon.com
Service manual
CAUTION
- BEFORE SERVICING THE UNIT, READ THE SAFETY
- PRECAUTIONS IN THIS MANUAL.
- ONLY FOR AUTHORIZED SERVICE PERSONNEL.
MODELS:
MPK-10CEN2 MPK-10CRN2 MPK-10EEN2 MPK-10ERN2
MPK-12CEN2 MPK-12CRN2 MPK-12EEN2 MPK-12ERN2
MPK-08CE MPK-08CR MPK-08EE MPK-08ER
MPK-09CE MPK-09CR MPK-09EE MPK-09ER
MPK-10CE MPK-10CR MPK-10EE MPK-10ER
MPK2-09CEN1-QB6 MPK2-09CRN1-QB6 MPK2-09EEN1-QB6 MPK2-09ERN1-QB6
MPK2-10CEN1-QB6 MPK2-10CRN1-QB6 MPK2-10EEN1-QB6 MPK2-10ERN1-QB6
MPK2-12CEN1-QB4 MPK2-12CRN1-QB4 MPK2-12EEN1-QB4 MPK2-12ERN1-QB4
MPK-09CEN2 MPK-09CRN2 MPK-09EEN2 MPK-09ERN2
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GD Midea Refrigeration Equipment Co. Ltd Service manual for K portable Series
CONTENTS
1. PREFACE
1.1 SAFETY PRECAUTIONS...................................... ............................... ................................ .......................1
1.2 INSULATION RESISTANCE TEST............................................................................................................1
1.3 FEATURES.................................................................................................................................................1
1.4 CONTROL LOCATIONS........................................ ......................................................................................2
2. TROUBLE SHOOTING GUIDE
2.1 REFRIGERATION CYCLE DIAGRAM............................................ ............................................................3
2.2 ELECTRIC FUNCTION…..........................................................................................................................3
2.3 TROUBLE SHOOTING GUIDE.................................................................................................................5
3. WIRING DIAGRAM
3.1 WIRING DIAGRAM FOR COOLING ONLY MODELS.................................................... ......................... ...8
3.2 WIRING DIAGRAM FOR COOLING AND HEATING MODELS.................................................... ..............8
3.3 ELECTRICAL CONTROL SCHEME……………………...............................................................................9
3.4 MAIN CONTROL BOARD SCHEME…………………................................................................................10
3.5 DISPLAY BOARD SCHEME…………………………..................................................................................11
4. HOW TO DISASSEMBLE THE UNIT…………………………………………………………………………….12
5. EXPLODED VIEWS…………………………………………...........................................................................19
6. SPARE PARTS LIST…………..………………………………………..…………………………………..……..19
7. SPECIFICATIONS.......................................................................................................................................19
1. PREFACE
This SERVICE MANUAL provides various servicing information, including the mechanical and electrical pa rts,
etc. This room air conditioner was manufactured and assembled under a strict quality control system.
The refrigerant was 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.
1.3 FEATURES
Water full alarm
Anti-icing function at cooling mode.
Restart relay protection for the compressor.
Temperature sensor err self-diagnose.
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GD Midea Refrigeration Equipment Co. Ltd Service manual for K portable Series
24 hours on/off mode time setting.
Both temperature mode display
Separate motor for indoor and outdoor system.
Multiple uses: dehumidifying and cloth drying.
Low temperature Drying operation.
There are four casters on the bottom for easy
movement.
Only one exhaust pipe, which makes the A/C
easier to use.
Remote-controlled or gentle-touch keys for easy
1.4 CONTROL LOCATIONS
For cooling only with electric heater models:
For cooling only models:
and comfortable use.
Compressors of famous brands are adopted for
reliability and low noise.
The heating system uses PTC electrical heater
and will not be affected by ambient temperature,
which saves energy.
Suitable for local cooling and heating.
Condenser shower and large volume tank design.
Long time to pour the tank.
Directly drainage available.
Timer OFF button. Push this button to set the
Timer Off time.
Timer ON/OFF lamp.
o
Fahrenheit temperature display. When
F
Fahrenheit temperature display mode is
selected.
o
Celsius temperature display. When Celsius
C
temperature display mode is selected.
Temperature setting up. Push this button to
set temperature setting up.
Temperature setting down. Push this button to
set temperature setting down.
Cooling operation lamp.
Drying operation lamp.
Remote receiver.
Timer ON button. Push this button to set the
Timer On time.
Fan only operation lamp.
Electric heating operation lamp.
Mode setting button. Push this button to select
the operation mode: Cool, Dry, Fan only and
Heat
High fan speed lamp.
Med fan speed lamp.
Low fan speed lamp.
Fan speed setting button. Push this button to
select fan speed: High, Med and Low.
Power button. Push this button to start the
unit.
Water full alarm lamp
Power lamp
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GD Midea Refrigeration Equipment Co. Ltd Service manual for K portable Series
Remote controller:
LCD display.
Mode button: Select the operation mode, AUTO,
COOL, DRY, HEAT (cooling only with
electric heater models only) and F A N.
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.
2 TROUBLESHOOTING GUIDE
2.1 REFRIGERATION CYCLE DIAGRAM
Temperature setting down button: Press this
button to decrease temperature
setting or adjust the TIMER in a
counter-clockwise direction.
Timer on button: Push this button to set the ON
timer.
Timer off button: Push this button to set the
OFF timer.
Lock button: Press this button to lock all button
except this button.
Reset button: Press this button to reset all
settings to factory settings.
2.2 ELECTRICAL FUNCTION
2.2.1 Electric Control working environment
2.2.1.1 Input voltage: 187~264V for 50Hz models
and 97~127V for 60Hz models;
2.2.1.2 Input power frequency: 50Hz or 60Hz;
2.2.1.3 Ambient temperature: -7°C~+43°C for
cooling only with electric heater models and
10°C~+43°C for cooling only models;
2.2.1.4 Indoor fan normal working amp is less
than 1A;
2.2.1.5 Outdoor fan. Normal working amp is less
than 1.5A;
2.2.1.6 Compressor: single-phase power supply.
Its normal working amp is less than 10A;
2.2.2 Proper symbols and their meanings:
TA: Indoor ambient temperature
TC: Indoor evaporator temperature
TS: Setting temperature through the remote
controller
2.2.3 Systematic functions
Remote receiving (Optional)
LED displaying and alarm
On or off Timer
Protection for the compressor
Water full alarm
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GD Midea Refrigeration Equipment Co. Ltd Service manual for K portable Series
Anti-icing function at cooling mode.
Temperature sensor err self-diagnose.
Both temperature mode display
2.2.4 Protection
2.2.4.1 The compressor functions protection with
a delay of three minutes.
2.2.4.2 Sensor protection at open or short circuit.
2.2.4.3 Evaporator anti-icing protection at cooling
mode.
2.2.4.4 Water full alarm
There are two water position switches used i n
the unit. One detects the water depth in the
chassis and the other detects the water in the
tank.
2.2.4.4.1 Water full alarm will be on when the unit
is standing by or operating.
2.2.4.4.2 When the water adds up to the first
position on the chassis, the pump will be
activated. If the water drops down through
the position, the pump will be on and stop
after 2 minutes.
2.2.4.4.3 When the water adds up to the position
on the tank, the compressor, outdoor fan
motor, electric heater and pump will stop
operation. And the LED will display “P1” while
the water full lamp flashes at 2Hz.
2.2.4.4.4 When the water adds up to the second
position on the chassis and the switch has
been on for 10 seconds, the whole unit will
stop operation. The LED will display “P2” and
the water full lamp will flash at 5Hz. After you
have clear the problem, you should unplug
the unit and plug again. Then the unit will be
ready to operate.
2.2.4.4.5 When the unit is standing by, if the unit
displays “P1”, the pump will not operate. After
the problem is cleared, the unit will be ready
to operate. But if you push the power button,
the unit will shut the “P1” display and shut
down.
2.2.5 Fan-only Mode Function Requirement
2.2.5.1 The compressor and outdoor fan are OFF
at Fan-only mode.
2.2.5.2 The speed of indoor fan can be optionally
chosen as High/Mid/Low.
2.2.6 Cooling Mode Function Requirement
2.2.6.1 The speed of indoor fan can be optionally
selected as High/Mid/Low.
2.2.6.2 The compressor operate as:
O
C
room temperature (TA)
Com p ressor ON
TS+1
TS
Compressor OFF
Temp down
Temp up
2.2.7 Drying mode
2.2.7.1 When the unit starts to operate in Drying
mode, the compressor will start while the
o
room temperature is over 13
C. After the
compressor started, the compressor will
operate as:
O
C
room temperature (TA)
Compressor and outdoor
o
15 C
o
13 C
fan ON
Compressor and
ou tdoor fan OFF
Temp down
Temp up
2.2.7.2 The indoor fan will operate with high
speed. The outdoor fan will operate with
compressor.
2.2.8 Heating mode
2.2.8.1 The speed of indoor fan can be optionally
chosen as High/Mid/Low.
2.2.8.2 Electric heater operate as :
O
C
room temperature (TA)
Electric heater OFF
TS+1
TS
Electric heater ON
Temp down
Temp up
2.2.9 Temperature display
2.2.9.1 The setting temperature will be displayed
in Cooling and Heating mode. The room
temperature will be displayed in Drying and
Fan only mode.
2.2.9.2 The setting temperature range is from
o
C to 30oC or 62oF to 88oF. The display
17
o
temperature range is from 10
o
F to 98oF. If the room temperature is lower
48
o
than 10
48
C or 48oF, the display will be 10oC or
o
F.
C to 35oC or
2.2.10 Timer Function
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GD Midea Refrigeration Equipment Co. Ltd Service manual for K portable Series
2.2.10.1 The maximum length of Timer is 24
hours and the minimum is 0.5 hours.
2.2.10.2 TIMER ON function: first turn OFF the
unit, the unit will be automatically ON at the
set time.
2.2.10.3 TIMER OFF function: first turn ON the
unit, the unit will be automatically OFF at the
set time.
2.2.10.4 TIMER ON/OFF function (ON TIMER is
earlier than OFF TIMER): first turn OFF the
unit, it will be automatically ON at set time,
and later be OFF at the set time.
2.2.10.5 TIMER OFF/ON function (OFF TIMER is
earlier than ON TIMER): first turn ON the unit,
it will be automatically OFF at set time, and
later be ON at the set time.
2.2.10.6 Timer function execution i s applicable
upon one operation only.
2.2.10.7 Timer preci sion is less than 15 minutes.
2.2.11 Auto restart function
In case of a sudden power failure, this
function automatically sets the unit to
previous settings before the power failure
when power returns.
2.3 TROUBLESHOOTING GUIDE
In general, possible trouble is classified in three kinds. One is called Starting Failure which is caused
from an electrical defect, another is ineffective Air Con ditioning caused by a defect in the refrigeration circuit
and improper application, and the other is called the Structure Damage.
ROOM AIRCONDITIONER VOLT AGE LIMITS:
NAMEPLATE RATING MINIMUM MAXIMUM
220~240V
115V
196V
103V
253V
122V
PROBLEM POSSIBLE CAUSE REMEDY
Check the power supplier if the power supplier is supplied to the
unit. Check the power cord and correct if damaged.
Check resistance between the two input/output lines on
transformer. Replace the transformer if either of the input/output
is open or the transformer is damaged.
Check the voltage on display board. Replace the display board if
it is +5V else replace the main PCB.
Check the voltage of battery. Replace batteries if the voltage is
lower than 2.3V.
Check voltage. Call an electrician if not within limits.
Test capacitor.
Replace if not within +/-10% of manufacture's rating.
Check bearings. Replace the motor if the blower wheel cannot
rotate freely.
Pay attention to any change from high speed to low speed.
Replace the motor if the speed does not change.
The amount of the refrigerant is too much, making the
compressor load too big. Recycle and recharge the refrigerant
after checking for the reason.
The compressor is blocked inside. Replace after checking for the
reason.
No power display
on panel or any one
of the buttons
failure.
Remote control
failure.
Fan motor runs
intermittently
Compressor stops
instantly after
startup.
Power failure
Transformer (Discharge
transformer before testing)
Display board or main PCB
failure
Battery failure
Cycles on overload.
Refrigerant
Compressor
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GD Midea Refrigeration Equipment Co. Ltd Service manual for K portable Series
No power Check voltage at electrical outlet. Correct if none.
Water alarm Check and correct if water alarm happens.
Power supply cord
Transformer (Discharge
transformer before testing)
Fan motor will not
run.
Fan motor noise.
Compressor will not
run while fan motor
runs.
Excessive noise. Copper tubing
Water full alarm
Wire disconnected or
connection loose
Main PCB failure
Capacitor (Discharge
capacitor before testing)
Will not rotate
Fan blower
Loose screws Tighten them.
Worn bearings
Voltage Check voltage. Call Supply Authority if not within limits.
Wiring
Main PCB failure Check voltage of main PCB. Replace the main PCB if open.
Capacitor (Discharge
capacitor before testing)
Room temp sensor
Compressor
Water tank full Check and pour if the water tank is full.
Water depth sensor if failure Check and replace if failure.
Water pump failure Check and replace if the pump if failure.
Water depth is over load in
chassis
Water depth sensing
structure
Check voltage at the power cord terminal on Main PCB. Replace
the power cord if none.
Check resistance between the two input/output lines on
transformer. Replace the transformer if either of the input/output
is open or the transformer is damaged.
Connect wire. Refer to wiring diagram for terminal identification.
Repair or replace loose terminal.
Select fan speed and Check the voltage on main PCB. Replace
the main PCB if no voltage in anyone.
Test capacitor.
Replace if not within +/-10% of manufacture's rating. Replace if
shorted, open or damaged.
Fan blower hitting scroll. Realign assembly.
Check fan motor bearings. Replace the motor if motor shaft do
not rotate.
Replace the fan blower if cracked, out of balance, or partially
missing.
Replace the motor if knocking sounds continue when running or
loose, or the motor hums or noise appears to be internal while
running.
Check the wire connections, if loose, repair or replace the
terminal. If wires are off, refer to wiring diagram for identification,
and replace. Check wire locations. If not per wiring diagram,
correct.
Check the capacitor.
Replace if not within +/-10% of manufacturers rating. Replace if
shorted, open, or damaged.
Check the temperature setting if not at the coolest (in cooling
mode) or the warmest (in heating mode). Set it if not.
Check the compressor for open circuit or ground. If open or
grounded, replace the compressor.
Remove the cabinet and carefully rearrange tubing not to contact
cabinet, compressor, shroud and barrier.
Check and drainage the water in the chassis by open the
drainage hose on the chassis.
Check and replace or realign if the structure is failure.
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