Beko Multi Type Air Conditioner User manual

BEKO
Service Manual
Portable Air Conditioner

CONTENTS
Instruction…………………………….…………………………………….1
1.1 The repair of ordinary breakdown……………………………………...2
1.2 Operation step……………………………….………………………3
2.1 Electric control theory…………………………..……………….….5
2.2. Typical Trouble-shooting Analysis……….……………………….7
2.3 Electric Control disassembly…………….…………………….…..13
3.1 Cooling Theory…………...……………………………………….….15
3.2 Examine & Repair of Cooling Troubleshoot ……………………15
3.3 Circuit Diagram……………………………………………….……...17
3.4 Explosive view……………………………………………….……...17

Instruction
◆This manual is only available for the above models.
BKP-09C、BKP-12C
◆ Please do not use this manual for any other products, we will not be responsible for the
accident caused by the possible wrong action.
◆The above must be repaired by professional workers。
◆ Please make sure the power plug and the power is off before the repair.

Chapter1.The repair of ordinary breakdown
1.1 Analysis of breakdown
When the unit is not able to work, please do not worry and do not separate the unit at once. In order
to solve the problem, please try to handle it according to the below methods.
When there is any breakdown, please follow the above information, if it is not effective yet, please try to
solve it according particular methods.
Breakdown Analysis of the season Methods
The unit is not able to
work
1.power cut
2.power plug is not on
3.display“P2”
1.make the power supply
available
2.make the power plug on
3. remove it into bathroom, pull
out the water plug and drain the
water inside（follow the
operation methods）
Cooling effect is not
distinct
1.air filter is full of dirt
2.anyobjet blocks the wind
outlet
3.room space is too big and
not airtight
1.clean the air filter (follow the
operation methods）
2.remove the block
3.adjust the space and make the
room airtight.
slack
1.the unit is declining
2water outlet is blocked
1.adjust the unit balance
2.pull off the water plug and
remove the block
Abnormal noisy
1.thye unit is not stable
2.airfilter is blocked
1.put the unit stable
2clean the air filter
Under the heating mode, there
is no warm wind at once
1.ambient temperature is
lower than the one setted
2.befoe the warm wind is
available, there is cool wind
insisting 3 minutes
1.set the temperature higher than
the ambient
2.please wait 3 minutes
Peculiar smell
Long time no use, the unit will
absorb some smell from the
environment
The peculiar smell will disappear
after turning on the unit 3
minutes.

1.2 Operation step
Step1：⑴Pull off the water plug , see photo 1 with hands.
⑵ Seeper will flow though the drainpipe.
⑶ When all the seeper is out, cover the plug.
Step 2.：
⑴Take out the air filter casing , see photo 2.
⑵Take out the air filter form the casing, see photo 3.
⑶Clean the filter, see photo 4.
⑷Put back the filter when it is dry

Step 3.
⑴open the batter cover of the remote control, see photo 5.
⑵make sure the battery is right.。
Chapter 2.
Repair when the unit is not able to on
2.1 Electric control theory
As we learnt from the picture, there are strong and weak electricity in the whole circuit
and the cut-off point is transformer.
When the strong electricity part is powered, two 50A relays RY6 and RY2 will
respectively control PTC heater and compressor. The current goes through fuse and then,
up-motor, down-motor, swing motor and water-spray motor. Up-motor has three speeds, and
respectively controlled by three 5A relays, which are RY1, RY3, RY4. They indicate
respectively high, middle and low speed. Only one of the three relays could be connected
at one time. When RY1 is connected, the up-fan speed is high; When RY3 is connected, the
up-fan speed is medium; When RY4 is connected, the up-fan speed is low. The starting
capacitor is 2uf/450V.The down-motor has two speeds and is controlled by two 5A relays,
RY8 and RY9 respectively. When RY8 connected, fan speed is high; when RY9 connected, fan
speed is low. The starting capacitor is 3 uf/450v.The swing motor is a step motor and
controlled by relay RY7.The water-spray motor is a electrode-covered motor and controlled
by RY5 relay.
Weak electricity part could be divided into two parts. One part is power supply,
another part is micro-control. The electricity becomes 13.5V alternate current through
transformer, and then is bridge-rectified by four IN4001 diodes. After rectification,
the current becomes 18.5V D.C through C2 capacitor, and goes through 7812 regulator and
becomes 12V stable current. The current then is divided into two routes. One route is

from RY1 to RY2…RY9 etc, which are nine relays and driver ICULN2003; another route becomes
stable 5V after 7812 regulator, and becomes single-chip, to supply electricity to LED
or LCD, or boozer etc.
Buttons, LED or LCD is a window of man-machine inter-action. The work status of machine
can be changed through buttons, LED or LCD indicates real-time work status of machine.
If remote control mode, the receiver of RC receive or send order or signal, and then pass
them to the single-chip. The surface temperature of evaporator is transferred to
single-chip through an evaporator sensor. Water level sensor transmit water level
information to the single-chip. All these signals pass to the single-chip, and then
analyzed and processed and the single-chip send all kinds of orders and control the on-off
status of all relays through driver ICULN2003.The whole machine works well under the
coordination of the single-chip.

2.2. Typical Trouble-shooting Analysis
Abnormal display
Display failure code
E1：Failure of the evaporator temperature
sensor：connection between the sensor plug and the
electric control panel is not very good, or there is
something wrong with sensor. E2：Failure of room
temperature sensor：connection between the sensor plug
and the electric control panel is not very good, or
there is something wrong with sensor.
E3：cooling system is abnormal：the compressor does not
start，or there is something wrong with down fan
motor.(see part 2 of chapter 3)
E4：Anti-frozen protection，it is normal.
P2:Water is full.（see part 1 of chapter 1).
the display is not complete, or the indicator is not flash ：
1.possiblly because the connection between the electric control panel and the
display board is not very good. just connect it again.
2.It also might because the problem of the display board, please change the display
board.

YES
NO connect the teminator N,L and the control panel piece
well.
check if the connection between input tip of the transformer
and the electric control panel is good or not.
NO connect it again
Check if the wire between the display board and the
electric control panel connected well.
connect it again
NO
check if the fuse is blown.
NO change the fuse.
YES
check by a AVOmeter and see if the resistance between plug tip N and the
COM1 terminator is lower than 0.1Ω, or check if the resistance between
the plug tip L and the COM piece of COMP relay RY2 is lower than 0.01Ω.
YES
YES
The machine is powered on, but neither it run,
nor it display.
check if the terminator N,L of the power cord and
the control panel piece connected well.

NO change the power cord.
YES
check by a AVOmeter and see if the resistance between plug tip N
and L is about 700Ω.(warp of 50Ω is allowed)
NO unplug the input terminator of the transformer, and check by a
AVOmeter and see if the resistance between two terminators is
about 700Ω.
NO change the transfomer.
check the elctric controller terminator PJ2, RY2 relay
and the fuse and see if they are well jointing.
check if the resistance between two output terminators
of the transformer is about 3.2Ω.
YES

NO if the resistance is 0Ω or higher than 1KΩ, please
change the transformer.
YES
check if the secondary socket of the transformer is well
jointing
seal the socket PJ1 again
NO

The down fan motor doesn’t run.
Set the machine in cooling mode, and see the down fan motor is running.
Yes
Restart the cooling modeNo
Slightly move the fan and check if something blocked the fan.
Yes
Move away the stem.
No
Check is the connection between the motor and the electric controller is well.
Connect again or change the plug.
Yes
No
Check if the fan motor is OK, and check if the wire connected well.
Change the fan motor capacitor.Yes No
Check if the resistance of principal windings or secondary windings is 0Ώor higher than 1 KΏ.
Replace with a same motor.
Yes
No
Change the PCB

Yes
No Yes
The up fan motor doesn’t run.
After starting the machine, choosing fan mode and see if there is any wind
blowing from the up motor.
Kindly check. Be sure that the setting
temperature should be lower than the room
temperature when in cooling mode; it also
should be higher than the room
temperature when in heating mode.
No
Slightly move the fan and check if something blocked the fan.
Yes Move away the stem.
No
Check is the connection between the motor and the electric controller is well.
Connect again or change the plug.
Yes No
Check if the fan motor is OK, and check if the wire connected well.
Change the fan motor capacitor.Yes
No
Check if the resistance of principal windings or secondary windings is 0Ώor higher than 1 KΏ.
Replace with a same motor.
Yes
No
Reset the
temperature.
Check the main electric controller
or change the temperature sensor.
Change the PCB.

2.3 Electric Control disassembly
Step 1: Disassembly six bolts at the both side pane. Also take part of two bolts between the bottom front
panel and the base plate. Then you can disassembly the front panel.. See photo 6.

（2）Disassembly 7 bolt at the back panel and take part of the back panel. See photo 7.
（3）Disassembly 2 bolts at left side and right side of the electric control. Meanwhile, disconnect the
Bolton the electric control cover. Then you can take part of the electric control cover. Please refer to
Photo 8.
Chapter 3 Maintenance for Not Cooling Troubleshoot
3.1 Cooling Theory
There are four parts for cooling system of our portable air conditioner. They are
compressor, condenser, capillary and evaporator , which will be connected by copper, see
diagram as below.
On the working condition, first the compressor will compress the normal temperature and low
pressure refrigerant to be high temperature and high pressure air. This air will discharge to the
condenser, dispersing the heating from the lower fan motor. The refrigerant in the condenser cooled to
be middle temperature and high pressure liquid（45℃-50℃）. Decompressed by the capillary,
refrigerant expand in the evaporator, appealing the quantity of heat of the surrounding
air. Then the cooling air will blow by upper fan motor.

3.2 Examine & Repair of Cooling Troubleshoot
Yes no
Yes
No
Yes No
The machine doesn’t run cooling function
Check the LCD display
Display error code the relevant error code( see part 2 of chart 2)
Abnormal display see electric controller part( see part 2 of chart
2)
Display OK
If the room temperature is higher than the setting temperature.
Set the temperature lower than room temperature..
If it is restarting after a short time close.
Please wait for 3 minutes because the machine was
set a 3 minutes delay starting protection after closed.
From the vibration of the machine you can judge is the compressor is starting
or not, or use the power meter to test and judge if the compressor is
starting.
See 3.2, Chapter 3 part 2 ---the compressor failed to start
After the compressor start, the temperature of the evaporator still doesn’t come down, the cause might as the
following:
1. After start for minutes the compressor stop running suddenly, and acutely vibrate. Stop the machine and
restart after 3 minutes and it still can’t work. The possible cause is that the system was blocked by
something---please check the system and change the capillary; or the outlet vent of the compressor might
be blocked when jointing.
2. After the start of the compressor, the vibration is not very big, and there are frosts on some parts of the
evaporator, at the same time the working electric current is lower than standard. This because the
refrigerant is not enough. Please up charge the refrigerant R407C.
3. After the start of the compressor, the vibration is small, the temperature of the evaporator didn’t change at
all, and the temperature of the outlet vent of the compressor is just 50~60℃. This possiblly because the
refrigerant completely leaked, please check the leaked part and sealed the again. After
vacuumized you can upcharge the refrigerant.
4. After the start of the compressor, the noise is vey big. After some seconds, the protector woks. The
temperature of the compressor is very high. Under this condition, please change the compressor.

Yes
No
Yes
No
Yes
Yes No
3.3 Circuit Diagram
The compressor doesn’t start.
Check if the resistance between the wire terminator of the compressor is good or not.
Usually, S-C 9secondary windings) is 2-10Ω; R-C( principal windings) is 2-6Ω.
Change the compressor
Check if the starting capacitor is OK. ( use a AVOmeter to check and
AVOmeter can charge up or discharge.)
Change the starting capacitor.
Check if the compressor has voltage.
Check the electric wire
Change the compressor

3.4 Explosive view
1. YPA-09C、 YPA-12C、YPA1-09C、YPA1-12C
Cooling only Series explosive view
2. YPB-07C、YPB-09C、YPB-12C
Cooling only Series explosive view