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Buttons on Remote Controller

2

4

3

1

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3

4

1

2

ON/OFF button

FAN button

MODE button

+/- button

1

5

6

8

11

10

13

14

2

3

4

7

9

12

16

15

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1

2

3

4

5

6

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FAN button

MODE button

+/- button

TURBO button button button 7

8

9

10

11

CLOCK button

TIMER ON/

TIMER OFF button

TEMP button

/ button

12 I FEEL button

13 LIGHT button

14

15

X-FAN button

QUIET button

16 SLEEP button

Introduction for Icons on Display Screen

I feel

Quiet

Operation mode

Auto mode

Cool mode

Dry mode

Fan mode

Set fan speed

Turbo mode

Send signal

Healthy mode

Scavenging functions

8 heating function

Set temperature

X-FAN function

Heat mode Set time

TIMER ON /TIMER OFF

Clock

Sleep mode

Light

: Set temp.

Temp. display type

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Child lock

Up & down swing

Left & right swing

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Introduction for Buttons on Remote Controller

Note:

● After putting through the power, the air conditioner will give out a sound.Operation indic D tor " " is ON (red indicator). After that, you can operate the air conditioner by using remote controller.

● Under on status, pressing the button on the remote controller, the signal icon " " on the display of remote controller will blink once and the air conditioner will give out a “de” sound, which means the signal has been sent to the air conditioner.

● Under off status, set temperature and clock icon will be displayed on the display of remote controller (If timer on, timer off and light functions are set, the corresponding icons will be displayed on the display of remote controller at the same time); Under on status, the display will show the corresponding set function icons.

1. ON/OFF button

Press this button, the unit will be turned on, press it once more, the unit will be turned off. Sleep function will be canceled, while unit off.


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2. FAN button

Press this button, Auto, Low, Medium-low, Medium, Medium-high, High speed can be circularly selected. After powered on, Auto fan speed is default. Under DRY mode, Low fan speed only can be set up.

ATUO

Note: It’s Low fan speed under Dry mode.

Low fan Medium-low fan Medium fan Medium-high fan High fan

3. MODE button

Press this button, Auto, Cool, Dry, Fan, Heat mode can be selected circularly. Auto mode is default while power on. Under Auto mode, the temperature will not be displayed;Under Heat mode, the initial value is 28°C( 82°F);Under other modes, the initial value is 25°C(77°F).

(only for cooling and heating unit.

As for cooling only unit, it won’t

AUTO COOL DRY FAN have any action when it receives

HEAT the signal of heating operation.)

4. +/- button

● Presetting temperature can be increased.

Press this button,the temperature can be set up, continuously press this button and hold for two seconds, the relative contents can quickly change,until unhold this button and send the order that the °C(°F) signal will be displayed all the time.The temperature adjustment is unavilable under the Auto mode, but the order can be sent by if pressing this button.Temperature of Celsius degree setting:16-30;for

Fahrenheit degree setting:61-86.

● Presetting temperature can be decreased.

Press this button, the temperature can be set up, continuously press this button and hold for two seconds, the relative contents can quickly change,until unhold this button and send the order that the °C(°F) signal will be displayed all the time.The temperature adjustment is unavailable under the Auto mode,but the order can be sent by if pressing this button.

5. TURBO button

Under Cool or Heat mode,press this button can turn on or turn off the Turbo function.After the Turbo function turned on, the signal of Turbo will display. The signal will be automatically cancelled if changing the mode or fan speed.

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Press this button to set left & right swing angle cycling as below:

OFF

7. button

Press this button to set swing angle,which circularly changes as below:

OFF

This remote controller is universal. If it receives threes kinds of following status,the swing angle will remain origial.

If guide louver is stopped when it is swinging up and down,it will remain its present position.

8. CLOCK button

Press this button, the clock can be set up,signal blink and display.Within 5 seconds, the value can be adjusted by pressing + or - button, if continuously press this button for 2 seconds above,in every 0.5 seconds, the value on ten place of Minute will be increased 1.During

After powered on, 12:00 is defaulted to display and signal will be displayed. If there is signal be displayed that denotes the current time value is Clock value, otherwise is Timer value.

9. TIMER ON/TIMER OFF button

● Timer On setting: Signal “ON”will blink and display,signal will conceal,the numerical section will become the timer on setting status.

During 5 seconds blink,by pressing + or - button to adjust the time value of numerical section,every press of that button,the value will be increased or decreased 1 minute.Hold pressing + or - button,2 seconds later,it quickly change,the way of change is: During the initial 2.5 seconds,ten numbers change in the one place of minute,then the one place is constant,ten numbers change in the ten splace of minute at

2.5 seconds speed and carry. During 5s blink,press the Timer button,the timer setting succeeds.The Timer On has been set up,repress the timer button,theTimer On will be canceled. Before setting theTimer,please adjust the Clock to the current actual time.

● One press this key to enter into TIMER OFF setup, in which case the TIMER OFF icon will blink. The method of setting is the sameas for


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TIMER ON.

10. TEMP button

Press this button,the following temperature can be setted circularly: the setting temperature, indoor ambient temperature and outdoor to ,displaying the indoor ambient temperature. is the outdoor ambient temperature. 3s laterit will return to the setting temprature or it depends on the other received signal within3s.

Note: Outdoor ambient temperatue display range is 0~60°C (32~99°F). As for the outdoor ambient temperature below 0it displays 0°C(32°F).

Warm tips: When operating buttons on the cover, please make sure the cover is closed completely.

11. / button(This function is only available for some models) scavenging function;LCD displays“ ”.Press the button for the second time to start healthy and scavenging functions simultaneously;LCD displays“ ”and “ ” .Press this button for the third time to quit healthy and scavenging functions simultaneously.Press the button for the fourth time to start healthy function; LCD display“ ” .Press this button again to repeat the operation above.

12. I FEEL button button, every 200ms to send I FEEL once, after this function started,the remote control will send temperature to the main un it in every 10 minutes.When repress this button, this function will be turned off.

13. LIGHT button

Press this button at unit On or Off status,Light On and Light Off can be set up.After powered on, Light On is defaulted.

14. X-FAN button

Pressing X-FAN button in COOL or DRY mode,the icon is displayed and the indoor fan will continue operation for 2 minutes in order to dry the indoor unit even though you have turned off the unit.After energization, X-FAN OFF is defaulted.X-FAN is not available in

AUTO,FAN or HEAT mode.

15. QUIET button

Press this button,the Quiet status is under the Auto Quiet mode (display" " and “Auto”signal ) and Quiet mode(display " " singal) and

Quiet OFF(there is no signal of " " displayed),after powered on,the Quiet OFF is defaulted. Under the Quiet mode (Display " "signal), the fan speed is not available.

16. SLEEP button

●Press this button, can select Sleep 1 ( ), Sleep 2 ( ),Sleep 3 ( ) and cancel the Sleep, circulate between these, after

●Sleep 1 is Sleep mode 1, in Cool, Dehumidify modes: sleep status after run for one hour, the main unit setting temperature will increase 1°C,

2 hours,setting temperature increased 2°C, the unit will run at this setting temperature; In Heat mode: sleep status after run for one hour, the setting temperature will decrease 1°C, 2 hours, setting temperature will decrease 2°C, then the unit will run at this setting temperature.

●Sleep 2 is sleep mode 2, that is air conditioner will run according to the presetting a group of sleep temperature curve.

In Cool mode:

(1) When setting the initial temperature 16~23°C, after turned on Sleep function, the temperature will be increased 1°C in every hour,after

3°C the temperature will be maintained, after 7hours,the temperature will be decreased 1°C, after that the unit will keep on running under this temperature;

(2) When setting the initial temperature 24~27°C, after turned on Sleep function, the temperature will be increased 1°C in every hour,after


(3) When setting the initial temperature 28~29°C, after turned on Sleep function, the temperature will be increased 1°C in every hour, after


(4) When setting the initial temperature 30°C, under this temperature setting, after 7hours, the temperature will be decreased 1°C, after that the unit will keep on running under this temperature;

In Heat mode:

(1) Under the initial presetting temperature 16°C, it will run under this setting temperature all along.

(2) Under the initial presetting temperature17~20°C, after Sleep function started up, the temperature will decrease 1°C in every hour, after

1°C decreased, this temperature will be maintained.

(3) Under the initial presetting temperature 21~27°C, after Sleep function started up, the temperature will decrease 1°C in every hour,after

2°C decreased, this temperature will be maintained.

(4) Under the initial presetting temperature 28~30°C, after Sleep function started up, the temperature will decrease 1°C in every hour, after

3°C decreased, this temperature will be maintained

●Sleep 3- the sleep curve setting under Sleep mode by DIY:

(1) Under Sleep 3 mode, press "Turbo" button for a long time, remote control enters into user individuation sleep setting status, at this time, the time of remote control will display "1hour ", the setting temperature "88" will display the corresponding temperature of last setting sleep

(3) At this time, 1hour will be automatically increased at the timer postion on the remote control, (that are "2hours" or "3hours" or "8hours "),


6HUYLFH0DQXDO the place of setting temperature "88" will display the corresponding temperature of last setting sleep curve and blink; control will resume the original timer display;temperature display will resume to original setting temperature.

●Sleep3- the sleep curve setting under Sleep mode by DIY could be inquired:

The user could accord to sleep curve setting method to inquire the presetting sleep curve, enter into user individuation sleep setting status,

Note: In the above presetting or enquiry procedure, if continuously within10s, there is no button pressed, the sleep curve setting status will be automatically quit and resume to display the original displaying. In the presetting or enquiry procedure, press "ON/OFF" button, "Mode" button, "Timer" button or "Sleep" button, the sleep curve setting or enquiry status will quit similarly.

17. About X-FAN function

This function indicates that moisture on evaporator of indoor unit will be blowed after the unit is stopped to avoid mould.

(1)Having set X-FAN function on: After turning off the unit by pressing ON/OFF button indoor fan will continue running for about 2 min. at low speed. In this period, press X-FAN button to stop indoor fan directly.

(2)Having set X-FAN function off: After turning off the unit by pressing ON/OFF button, the complete unit will be off directly.

18. About AUTO RUN

When AUTO RUN mode is selected, the setting temperature will not be displayed on the LCD, the unit will be in accordance with the room temp. automatically to select the suitable running method and to make ambient comfortable.

19. About turbo function

If start this function, the unit will run at super-high fan speed to cool or heat quickly so that the ambient temp. approachs the preset temp. as soon as possible.

20. About lock

Press + and - buttons simultaneously to lock or unlock the keyboard. If the remote controlleris locked, the icon will be displayed on it, in

.

21. About swing up and down

(1)Press swing up and down button continuously more than 2s,the main unit will swing back and forth from up to down, and then loosen the button, the unit will stop swinging and present position of guide louver will be kept immediately.

(2)Under swing up and down mode, when the status is switched from off to , if press this button again 2s later, status will switch to off status directly; if press this button again within 2s,the change of swing status will also depend on the circulation sequence stated above.

22. About swing left and right(This function is only available for some models)

(1)Press swing left and right button continuously more than 2s,the main unit will swing back and forth from left to right, and then loosen the button, the unit will stop swinging and present position of guide louver will be kept immediately.

(2)2. Under swing left and right mode, when the status is switched from off to , if press this button again 2s later, status will switch to off status directly; if press this button again within 2s,the change of swing status will also depend on the circulation sequence stated above.

23. About switch between Fahrenheit and Centigrade

Under status of unit off, press MODE and - buttons simultaneously to switch °C and °F.

24. Combination of " TEMP" and "CLOCK" buttons : About Energy-saving Function

Press “TEMP” and “CLOCK” simultaneously in COOL mode to start energy-saving function.Nixie tube on the remote controller displays “SE”.

Repeat the operation to quit the function.

25. Combination of " TEMP" and "CLOCK" buttons : About 8°C Heating Function 7KLVIXQFWLRQLVRQO\DYDLODEOHIRUVRPHPRGHOV

Press “TEMP” and “CLOCK” simultaneously in HEAT mode to start 8°C Heating Function.Nixie tube on the remote controller displays"

"and a selected temperature of “8°C” (46°F if Fahrenheit is adopted). Repeat the operation to quit the function.

26. About Auto Quiet function

When auto quiet function is selected:

(1)Under cooling mode: indoor fan operates at notch 4 speed. 10 minutes later or when indoor ambient temperature≤28°C, indoor fan will operate at notch 2 speed or quiet mode according to the comparison between indoor ambinet temperature and set temperature.

(2)Under heating mode: indoor fan operates at notch 3 speed or quiet mode according to the comparison between indoor ambient temperature and set temperature.

(3)Under dry, fan mode: indoor fan operates at quiet mode.

(4)Under auto mode: the indoor fan operates at the auto quiet mode according to actual cooling, heating or fan mode.

27. About Sleep function

Under the Fan and Auto mode, the Sleep function cannot be set up, under Dehumidify mode, only Sleep 1 can be selected.Select and enter into any kind of Sleep mode, the Quiet function will be attached and stared, different Quiet status could be optional and turned off.


6HUYLFH0DQXDO

Operation Guide

1. General operation

(1)After powered on, press ON/OFF button, the unit will start to run. (Note: When it is powered on, the guide louver of main unit will close automatically.)

(2)Press MODE button, select desired running mode.

(3)Pressing + or - button, to set the desired temperature (It is unnecessary to set the temp. at AUTO mode.)

(4)Pressing FAN button, set fan speed, can select AUTO FAN,LOW, MEDIUM-LOW, MEDIUM, MEDIUM-

HIGH and HIGH.

(5)Pressing and button, to select the swing.

2. Optional operation

(1)Press SLEEP button, to set sleep.

(2)Press TIMER ON and TIMER OFF button, can set the scheduled timer on or timer off.

(3)Press LIGHT button, to control the on and off of the displaying part of the unit (This function may be not available for some units).

(4)Press TURBO button, can realize the ON and OFF of TURBO function.

1

4

3

Replacement of Batteries in Remote Controller

cover of battery box along the arrow direction.

2. Replace two 7# (AAA 1.5V) dry batteries, and make sure the position of "+" polar and "-" polar are correct.

3. Reinstall the cover of battery box.

Note:

● During operation, point the remote control signal sender at the receiving window on indoor unit.

● The distance between signal sender and receiving window should be no more than 8m, and there should be no obstacles between them.

remote controller should be close to indoor unit during operation.

● Replace new batteries of the same model when replacement is required.

● When you don’t use remote controller for a long time, please take out the batteries.

● If the display on remote controller is fuzzy or there’s no display, please replace batteries.

4

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Space to the wall

At least 15cm

At least 300cm

Space to the obstruction

Space to the wall

At least 15cm


Space to the wall

At least 30cm


At least 30cm n

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At least 50cm

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Start installation

Preparation before installation

Read the requirements for electric connection select installation location

Prepare tools

Select indoor unit installation location

Install wall-mounting frame, drill wall holes

Connect pipes of indoor unit and drainage pipe

Connect wires of indoor unit

Bind up pipes and hang the indoor unit

Select outdoor unit installation location

Install the support of outdoor unit

(select it according to the actual situation)

Fix outdoor unit

Install drainage joint of outdoor unit

(only for cooling and heating unit)

Make the bound pipes pass through the wall hole and then

connect outdoor unit

Connect pipes of outdoor unit

Connect wires of outdoor unit

Neaten the pipes

Vacuum pumping and leakage detection

Check after installation and test operation

Finish installation

Note: this flow is only for reference; please find the more detailed installation steps in this section.

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The breaker trips at once when it is set to “ON”.

The breaker trips in few minutes when it is set to “ON”.

No power

Power plug is not well plugged in and poor connection.

Fuse of controller burnt out

The transformer connection is loose or has bad contact or the transformer has malfunction.

Measure insulation resistance to ground to see if there is any leakage.

The circuit or the part of the air conditioner has malfunction.

They heat and break the insulation and lead to short circuit or creepage. Measure the insulation resistance or eliminate the malfunction one by one. If the breaker itself has malfunction, then replace the breaker.

Check power supply circuit.

Check if the plug is properly plugged in and make the loose contact firm.

Change controller fuse

Fasten the wiring; measure the output voltage of the transformer , if it is incorrect, change the transformer.

Controller is broken Check remote controller

Remote controller is short of power Change batteries

The remote controller does not receive signals (after it is powered, the buzzer will sound, unless it has malfunction)

Remote controller malfunction

Receiver loose or poor connection

Receiver is broken

Power voltage is too low

First, press the manual switch b u t t o n A U TO , i f t h e r e i s n o response,check based on the above methods. If it runs normally after pressing the button, check again whether the installation position and the connection wire of the reception head is correct. If it is correct,then replace the receiver or the remote controller.

Check the voltage. If it is lower than 10% of the rated voltage, check the cause, improve the power supply condition and add the stabilized voltage power supply.

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Improper set of temperature Adjust set temperature

If cooling (heating) load is proper

Malfunction of refrigerant flow

Check the forecasted load of cooling (heating)

The refrigerant has leakage or is insufficient

Leakage between the high pressure and the low pressure inside the compressor

Malfunction of four-way valve

Check and fill the leakage, then vacuumize it and supplement the refrigerant as required

Replace the compressor

Replace the four-way valve

Local block of capillary Replace the capillary

Blockage of cooling system

Judge whether the system is blocked by observing the condensation of evaporator and the pressure value of the high pressure manometer and take measures to deal with the system.

Heat insulation for the connection pipes of the indoor unit and the outdoor unit is bad.

Air filter were blocked

Make sure that heat insulation for the thick and thin pipes is good. Heat insulation must also be provided for the joint andthe exposed part of the copper pipe .

Block of outdoor heat exchanger

Clean the dust accumulated on the surface of the heat exchanger.

Clean the filter

Fan speed was set too slow

To set the fan speed to high or middle speed

Air circulation is insufficient

Fan rotation speed becomes low

Capacitor damage

Motor damage

Replace the capacitor

Replace the motor

The installation position of the outdoor unit is not appropriate.

The outdoor temperature is too high.

Good ventilation must be provided for the installation position of the outdoor unit.

Properly install the rainproof plate or the sunproof plate. If the maximum cool air still can not meet the requirement, it is suggested to replace the air conditioner.

The air tightness is not enough. People come in and out too frequently. There are heating devices indoors.

Keep certain air tightness indoors, try not to use electricalappliance with large quantity of heat


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The fan does not run when it is set to supply air.

In the cooling and heating mode, the compressor runs, but the outdoor fan does not run.

In the cooling and heating mode, the outdoor fan runs, but the compressor does not run.

The compressor is too hot and leads to the action of the protector.

The indoor fan motor is burned or breaks or has the heat protector malfunction.

The built-in heat protector of the motor breaks frequently because the motor is abnormal.

Wrong connection

The fan capacitor has open circuit or is damaged.

The outdoor fan motor is damaged.

Wrong connection

The outdoor fan capacitor is damaged.

Malfunction of compressor

Breakage of running capacitor of compressor

The voltage is too low or too high.

Wrong wire connection

The protector itself has malfunction.

The refrigerant is not enough or is too much.

The capillary is blocked and the temperature rises.

The compressor does not run smoothly or is stuck. The air discharge valve is damaged

The protector itself has malfunction.

Replace the fan motor or the defective part.

Replace the fan motor

Make the correction connection based on the circuit drawing.

Replace the fan capacitor of the same type and same specification.

Replace the fan motor

Make the correct connection based on the circuit drawing

Replace the fan capacitor



Manostat is recommended.

Connect the circuit diagram correctly

Use the multimeter to check whether the contact of the compressor is on when it is not overheated. If it is not on, then replace the protector

Adjust the volume of the refrigerant

Replace the capillary


Replace the protector


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The swing fan does not run.

In cool, heat mode, the outdoor unit and compressor will not run.

Water leakage

Abnormal sound and shake

The torque of the swing motor is not enough

Wrong connection

The controller is damaged(IC2003 is damaged, the swing relay can not close, etc)

C o n t r o l l e r m a l f u n c t i o n ( I C 2 0 0 3 broken, creepage of parallel capacitor of relay loop, relay is broken etc.)

Wire loose or wrong connection

Improper setting of temperature

Drainage pipe blocked or broken

Wrap of refrigerant pipe joint is not close enough.

Fan of indoor unit contacts other parts

Foreign object in indoor unit

Compressor shakes too much

Touch of pipeline of outdoor unit

Touch of inner plates

Louver of outdoor unit touched outer case.

Abnormal sound inside compressor

First, check whether the connection is wrong. If no, replace the parts

Change controller

Correctly wire according to the drawing

Adjust setting temp.

Change drainage pipe

Re-wrap and make it tight.

Adjust fan location

Take out the foreign object

Adjust support washer of compressor, and tighten loosen screws

Separate the touching pipeline.

1. Tighten connect screw.

2. Stick absorbing clay between plates.

Adjust location of louver.

Change compressor


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Start

Is the wiring

terminal between temperature sensor and the controller loosened or

poor ly contacted?

yes

Insert the temperature sensor tightly no no

Malfunction is eliminated.

Is there short circuit due to tri-pover

of the pa rts?

yes

Make the parts upright no no

Is the te mperature sensor normal according to the

Resistance Table?

Malfunction is eliminated.

yes yes no

Replace the controller with one of the same model no

Replace it with a temperature sensor of the same model

Malfunction is removed.

yes yes

End


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Start

Turn the fan blades by hand under power-off condition

Whether the fan blades can run smoothly?

No

Adjust the motor and blade assembly so that rotor can run smoothly.

Yes

No

Turn unit on to check whether the malfunction is eliminated.

Reinsert the wiring terminal of indoor fan.

Under power-off condition, check whether the wiring terminal between indoor fan and main board is loose.

Yes

No No

Turn unit on to check whether the malfunction is eliminated.

Connect power and restart the unit.

Test whether the voltage between terminal 1 and terminal 2 of motor interface is within 280~310VDC.

No

It's the malfunction of main board.

Replace a new main board that is of the same model.

Yes

Yes

Yes

Then check whether the voltage between terminal 2 and terminal 3 of the motor interface is 15VDC.

Yes

Then check whether there is voltage between terminal 2 and terminal 4 of the motor interface.

Yes

It's the malfunction of motor.

Replace a new motor that is of the same model.

No



No



END


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Troubleshooting for C5 malfunction

Is there jumper cap on the mainboard ?

yes

Is the jumper cap inserted correctly and

tightly ?

no yes no

Replace the jumper cap with the same model

Is malfunction eliminated no

Replace the mainboard with the same model.

End no

Assemble the jumper cap with the same model

Appearance of the jumper cap

Is malfunction eliminated no

Insert the jumper cap tightly

Is malfunction eliminated yes yes yes


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Start

Cut off power, check if the wire between indoor unit and outdoor unit, and the wire inside electric box are connected correctly

Connected correctly?

No

Reconnect the wire

according to wiring diagram

No

Yes

Malfunction is

eliminated

Is there incorrect match between the mainboard and the display panel or between the indoor and outdoor

mainboards?

No

Match them

according to the requirement

Yes

No

Communication wire connection is broken?

No

Replace indoor mainboard

Yes

Replace the wire

No

No

Replace outdoor mainboard

Malfunction is

eliminated

Yes

End

Malfunction is

eliminated

Yes

Malfunction is

eliminated

Yes

Yes


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Turn on the unit and wait 1 minute

Use DC voltmeter to measure the voltage on the two ends of electrolytic capacitor

Voltage higher than 200V?

N

Measure the AC voltage between terminal L and N on wiring board

XT(power supply)

Y

Fault with the voltage testing circuit on control panel AP1

Replace the control panel AP1

Voltage within

210VAC~250VAC?

Y

Shut down the power and wait 20 minutes; or use DC voltmeter to measure the voltage on the two ends of capacitor , until the

voltage is lower than 20V

N

Shut down the power and repair the power supply to restore the range

210VAC~250VAC power on and restart the unit

N

Check the connection of reactor

(L in the Electrical

Wiring Diagram)

If the wiring of reactor L is normal?

Y


N

Connect the reactor

Laccording to Electrical Wiring Diagram correctly

Re-energize and turn on the unit

N

If the fault is eliminated?


Y

Y

End


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Energize and switch on

IPM protection occurs after the machine has run for a period of time?

If the voltage between terminal L and N on wiring board XT is within

210VAC~250VAC?

Y

Please confirm:

1. If the indoor and outdoor heat exchangers are dirty? If they are obstructed by other objects which affect the heat exchange of indoor and outdoor unit.

2. If the indoor and outdoor fans are working normally?

3. If the environment temperature is too high, resulting in that the system pressure is too high and exceeds the permissible range?

4. If the charge volume of refrigerant is too much, resulting in that the system pressure is too high?

5. Other conditions resulting in that the system pressure becomes too high.

Refer to the

Electrical Wiring

Diagram and check

if the connection between AP1 and

COMP is loose and if the connection order is correct.

Y

Voltage between the two ends of celectrolytic capacitor is higher than

250V

N

Stop the unit and

disconnect the power

supply. Then, check

the connection of capacitor C2 according to Electrical

Wiring Diagram.

Remove the wires

on the two ends of capacitor C2. Then, use capacitance meter to measure the capacitor C2.

Verify as per the

Parameters Sheet.

Restart the unit. Before protection occurs, use DC voltmeter to measure the voltage between the two ends of electrolytic capacitor on control panel AP1

The connection of capacitor C2 is loose.

N

Stop the unit and disconnect the power supply. Wait 20 minutes, or use DC voltmeter to measure the voltage between the two ends of capacitor C2, until the voltage is lower than 20V

N

Y

N

If capacitor

C2 is failed?

N

If there is any abnormality

N

Y described above?

Y


C2. Then, energize and start the unit.


Take corrective actions according to Technical

Service Manual, and then energize and start the unit.


If the connection between AP1 and

COMP is unsecure or the connection order is wrong?

Y

Y

Use AC voltmeter to measure the voltage between terminal L and N on the wiring board XT)

Connect the control panel

AP1 and compressor

COMP correctly according to the Electrical Wiring

Diagram. Then, energize and start the unit.

If the unit can work normally?

N

Check the supply voltage and restore it to

210VAC~250VAC

Reconnect the capacitor C2 according to Electrical Wiring

Diagram. Then,

Restart the unit.

If the unit can work normallv?


N


N


Y

Y

Y

Y

Y

Use ohmmeter to measure the resistance between the three terminals on compressor

COMP, and compare the measurements with the compressor resistance on

Service Manual.

Use ohmmeter to measure the resistance between the two terminals of compressor

COMP and copper tube.

If the resistance is normal?

N

Resistance higher than 500MΩ?

Y

Replace the control panel

AP1


COMP

N

END


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Overheat and high temperature protection

Is outdoor ambient temperature higher than 53?

N

20 minutes after the complete unit is powered off.

Y

Normal protection, please operate it after the outdoor ambient temperature is normalized.

Is heat dissipation of the indoor unit and outdoor unit abnormal?

N

Y

Improve the heat dissipation environment of the unit

Does the outdoor fan work normally?

N

1. Check if the fan terminal OFAN is connected correctly

2. Resistance between any two terminals is measure by an ohm gauge and should be less than 1K

Ohm.

Y


Replace the fan capacitor C1

Replace the outdoor fan

End


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Power on the unit

N

Is stop time of the compressor longer than 3 minutes?

Y

Does startup fail?

Y

Are the wires for the compressor connected correctly? Is connection sequence right?

N

Restart it up after

3 minutes

N

Connect the wires as per the connection diagram

Y



N


Y

End

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Out of step occurs once the unit is powered on.

Out of step occurs in operation

Is stop time of the compressor longer than

3 minutes?

Is the outdoor fan working normally?

Check if the fan terminal

OFAN is connected correctly

Replace the fan capacitor C1

Replace the outdoor fan

Remove foreign objects

Is the outdoor unit blocked by foreign objects?


Are the wires for the compressor connected correctly? Is connection sequence right?

Is the connection made in clockwise direction?

Connect the wires correctly




End



End


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20 minutes after the complete unit is powered off

Is the terminal FA for the electronic expansion valve connected correctly?

Connect the wires correctly

Resistances between the first four pins close to the terminal hole and the fifth pin are almost the same, less than 100 ohm.

Replace the electronic expansion valve


Replace the control panel

AP1


Coolant leakage, refilling the coolant

End

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Start

Check wiring of the reactor (L) of the outdoor unit and the

PFC capacitor

Whether there is any damage or short-circuit?

Y

Replace it as per the wiring diagram and reconnect the wires

N

Remove the PFC capacitor and measure resistance between the two terminals.

Is the resistance around zero?

N

Disconnect the terminals for the reactor and measure the resistance between the two terminals of the reactor by an ohm gauge

Y

The capacitor is short circuited and the capacitor should be replaced

N

Restart the unit

N

Whether there is any damage or short-circuit?

Y Replace the reactor

N

Restart the unit


N




Y

Y

Y

End


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Start

Y

Check wiring inside of the indoor and outdoor units

The AP1 voltage detection circuit is at fault

Y


N

Are wires broken?

N

Check the communication circuit of the outdoor unit

Did the equipment operate normally before the failure occurs?

Y

N

N

Check the wiring of the indoor and outdoor units with reference to the wiring diagram

Is the connection right?

N

Correctly connect the corresponding wires for the indoor and outdoor units with reference to the wiring diagram


Y

The communication circuit is abnormal

Y

Replace the main board

AP1 of the outdoor unit

N

Replace the main board of the indoor unit

N


Y

End

Y


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Steps

1. Before disassembling the unit

Procedure

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Before disassembling the unit.

2. Remove filter

1 Open the panel.

2 Loosen the clasps on filter, push the filter inward and then pull it upward, then the filter can be removed.

3.Remove guide louver

1 Remove the axial bushing of big guidelouver. axial bushing


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Steps

2 Remove the rotating shaft of big guide louver from the groove, slightly bend thebig guide louver to remove it.

Procedure

3 Remove the axial bushing of small guide louver.

4 Remove the rotating shaft of small guide louver from the groove, slightly bend the small guide louver to remove it.

4.Remove panel

1 Loosen the clamps of the panel to remove the panel. big guide louver axial bushing small guide louver


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Steps

2 panel, to remove the display.

5.Remove front case

1 Remove the screws fixing electric box cover 2, to remove the electric box cover

2.

Procedure electric box cover 2 screw

2 Remove the screws fixing front panel, loosen the clamps, to remove the front case. screw clamp front case


Steps

6.Remove swing fan blade

1 Loosen the clamps fixing swing connecting rod, to remove the swing connecting rod.

Procedure clamp swing connecting rod

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2 remove the swing fan blade.

clamp

7.Remove electric box sub-assy

1 Remove the indoor tube temp. sensor.

swing fan blade heat exchanger thermistor

2 Remove the screws fixing earth wire, to remove the earth wire.

earth wire screw


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Steps

3 to remove the cover.

Procedure

4 Remove every wiring terminals, and remove the electric box cover sub-assy.

7.Remove evaporator sub-assy pipe clamp auxiliary piping electric box cover electric box cover sub-assy screw

1 Remove the screws fixing connection pipe clamp, to remove the connection pipe clamp.

screw screw


Steps Procedure

2 Remove the screws fixing evaporator sub-assy, slightly regulate the tube, to remove the evaporator sub-assy. evaporator sub-assy auxiliary piping

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8.Remove cross fan blade and motor

1 motor, to remove the motor.

2 to remove the motor. up&down swing motor left&right swing motor


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Steps

3 Remove the screws fixing motor clamp, to remove the motor clamp.

Procedure

4 Remove the cross fan blade and motor.

5 Remove the shafting bearing cushion rubber base bearing cushion rubber base screw motor clamp

6 blade and motor, and then remove the motor. cross fan blade motor


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Step Procedure

1. Remove top cover

Remove the screws connecting top cover, left and right side plate, as well as panel, to remove the top cover.

2. Remove handle and valve cover

Remove the screws connecting handle and right side plate, to remove the handle.Remove the screw fixing valve cover, to remove the cover.

3. Remove panel and grille

Remove the screws fixing panel, to remove the panel.

Remove the screws connecting panel grille and panel, loosen the clamp, to remove the panel grille.

top cover handle valve cover panel grille


6HUYLFH0DQXDO

Step

4. Remove left side plate

Procedure

Remove the screws fixing left side plate and condenser support boa rd, to remove the left side plate.

5. Remove cross fan blade

Remove the screw nut fixing cross fan blade, remove the gasket and spring cushion, to remove the cross fan blade.

left side plate

6. Remove right side plate

Remove the screws fixing right side plate and valve support, to remove the right side plate.

cross fan blade right side plate


Step

7. Remove electric box assy

Procedure

Remove screws fixing electric box assy and mid-isolation board, loosen the bonding tie, pull off the wiring terminal, lift to remove the electric box assy.

6HUYLFH0DQXDO electric box cover electric box assy

8. Remove electric reactor

Remove the screws fixing electric reactor, to remove the electric reactor.

electric

reactor

9. Remove motor and motor support

Remove the four tapping screws fixing motor, pull out the contact tag of motor wiring, to remove the motor.

Remove the two tapping screws fixing motor support and chassis, lift to remove the motor support.

motor motor support


6HUYLFH0DQXDO

Step

10. Remove

flash vaporizer assy

Procedure

Remove the screws connecting mid-isolation board, lift to remove the flash vaporizer assy.

flash vaporizer assy

11. Remove four-way valve assy

Welding cut the spot weld of four-way valve assy, compressor air suction/discharging valve and condenser pipe outlet, lift to remove the four-way valve assy.

(Note: release the refrigerant before welding cutting.) four-way valve assy

12. Remove mid-isolation board

Remove the screws connecting mid-isolation board, chassis and condenser assy, to remove the mid-isolation.

mid-isolation board


Step

13. Remove compressor

Procedure

Remove the three feet screwnuts fixing compressor, to remove the compressor.

6HUYLFH0DQXDO compressor

14. Remove big and small valve assy

Remove screws connecting condenser assy and chassis, to remove the condenser assy.

Remove the screws fixing big and small valve, to remove the valves.

condenser assy

15. Remove chassis sub-assy

big valve small valve

Remove screws connecting condenser assy and chassis, to remove the chassis sub-assy.


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