TCL TCD125D1HWH-DV (02) PDF Document

Failure to observe a warning may result in death, injury, or damage to the equipment. Please follow these warnings:

• Ask your Dealer or qualified personnel to carry out installation work. Do not try to install the machine yourself, as improper installation may result in water leakage, electric shock, or fire.

• Perform installation work in accordance with the installation manual. Improper installation may result in water leakage, electrical shock, or fire.

• Be sure to use only the specified accessories and parts for installation work. Failure to use specified parts may result in water leakage, electric shock, fire, or the unit failing.

• Install the conditioner on a structure strong enough to withstand the weight of the unit. An insufficient structure may result in the equipment falling and causing injuries.

• Carry out the specified installation work after considering strong winds, typhoons, or earthquakes. Improper installation work may result in the equipment falling and causing accidents.

• Ensure a separate power supply circuit is provided and all electrical work is carried out by qualified personnel according to local laws, regulations, and this installation manual. An insufficient power supply or improper electrical construction may lead to electric shocks or fire.

• Make sure all wiring is secured, the specified wires are used, and no external forces act on the terminal connection or wires. Improper connections or installation may result in fire.

• When wiring, position wires so that the switch box cover can be securely fastened. Improper positioning may result in electric shock, fire, or the terminals overheating.

• If refrigerant gas leaks during installation, ventilate the area immediately.

• After completing installation, check that the refrigerant gas does not leak. Fire may occur if leaked refrigerant contacts an ignition source.

• Before accessing terminals and electrical parts, all supply circuits must be disconnected.

• Do not install the indoor unit or remote controller where they may be exposed to rain or moisture. Water or other fluids on electrical components may result in fire or electric shock.

• Grounding is necessary. Earth the air conditioner. Do not connect the earth wire to gas or water pipes, a lightning conductor, or a telephone ground wire. Improper earthing may result in electric shock.

• Be sure to install an earth leakage breaker. Failure to do so may result in electric shock.

Failure to observe a caution may result in injury or damage to the equipment. Please adhere to the following cautions:

• Do not install the indoor unit or wired controller where flammable gases may leak, where there are carbon fibers or ignitable dust, or where volatile flammables like thinner or gasoline are handled.

• Do not install the indoor unit or wired controller where the area is filled with steam or the ground is always wet. Insulation of electric components may be damaged, resulting in electric shock.

• Be sure to only use refrigerant piping approved for use with R32 refrigerant. Unapproved piping may result in an explosive rupture.

• When making piping connections, do not let air or other substances other than the specified refrigerant enter the refrigeration cycle. This can cause lower capacity, abnormally high pressure, explosion, and injury.

• The appliance is not for use by persons (including children) with reduced physical, sensory, or mental capabilities, or lack of experience, unless supervised or instructed.

• Children should be supervised to not play with the appliance.

• The appliance must be installed according to national wiring regulations.

• This appliance can be used by children aged 8 and above and persons with reduced capabilities if they have been given supervision or instruction.

• Children shall not play with the appliance. Cleaning and user maintenance shall not be done by children without supervision.

1. Check this manual for the dimensions of space needed for proper installation, including minimum distances to adjacent structures.

2. The appliance must be installed, operated, and stored in a room with a floor area larger than 4m².

3. Installation of pipe-work shall be kept to a minimum.

4. Pipe-work must be protected from physical damage and not installed in an unventilated space if the space is smaller than 4m².

5. Compliance with national gas regulations must be observed.

6. Mechanical connections must be accessible for maintenance.

7. Follow instructions for handling, installing, cleaning, maintaining, and disposing of the refrigerant.

8. Ensure ventilation openings are clear of obstruction.

9. Servicing shall be performed only as recommended by the manufacturer.

10. **Warning:** The appliance must be stored in a well-ventilated area where the room size corresponds to the room area specified for operation.

11. **Warning:** The appliance must be stored in a room without continuously operating open flames (e.g., an operating gas appliance) and ignition sources (e.g., an operating electric heater).

12. The appliance must be stored to prevent mechanical damage.

13. Anyone working on a refrigerant circuit should hold a valid certificate from an accredited assessment authority, recognizing their competence to handle refrigerants.

14. Every working procedure that affects safety must only be carried out by competent persons.

15. **Warning:**

– Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer.

– The appliance must be stored in a room without continuously operating ignition sources.

– Do not pierce or burn.

– Be aware that refrigerants may not contain an odor.

Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure the risk of ignition is minimized. For repair to the refrigerating system, the following precautions must be complied with:

1. **Work procedure:** Work shall be undertaken under a controlled procedure to minimize the risk of a flammable gas or vapor being present.

2. **General work area:** All maintenance staff and others in the local area must be instructed on the nature of the work. Avoid work in confined spaces. The area around the workspace must be sectioned off and made safe by controlling flammable material.

3. **Checking for presence of refrigerant:** The area must be checked with an appropriate refrigerant detector before and during work to ensure the technician is aware of potentially flammable atmospheres. The leak detection equipment must be suitable for use with flammable refrigerants (non-sparking, adequately sealed, or intrinsically safe).

4. **Presence of fire extinguisher:** If hot work is conducted, appropriate fire extinguishing equipment (dry powder or CO2) must be available.

5. **No ignition sources:** No person working on a refrigeration system shall use any sources of ignition that may lead to fire or explosion. All possible ignition sources, including cigarette smoking, should be kept sufficiently far away. “No Smoking” signs must be displayed.

6. **Ventilated area:** Ensure the area is in the open or adequately ventilated before breaking into the system or conducting hot work. Ventilation must continue during the work period to safely disperse any released refrigerant.

7. **Checks to the refrigeration equipment:** When changing electrical components, they must be fit for the purpose and to the correct specification. Always follow the manufacturer’s maintenance and service guidelines.

8. **Checks to electrical devices:** Repair and maintenance to electrical components must include initial safety checks and component inspection procedures. If a fault that could compromise safety exists, no electrical supply should be connected until it is resolved. Initial safety checks include ensuring capacitors are discharged safely, no live electrical components are exposed, and there is continuity of earth bonding.

The installation of your TCL TCD125D1HWH-DV, which uses R32 refrigerant, must be in a room larger than the minimum construction area. This area is determined by the total refrigerant charging quantity (factory charge + additional charge). Please refer to the following table to determine the minimum required area for your ceiling-type unit.

Minimum Room Area for Ceiling Type Unit

R32 refrigerant Weight (kg)	Area (m²)
<1.224	–
1.224	0.956
1.4	1.25
1.6	1.63
1.8	2.07
2.0	2.55
2.2	3.09
2.4	3.68
2.6	4.31
2.8	5.00
3.0	5.74
3.2	6.54
3.4	7.38
3.6	8.27
3.8	9.22
4.0	10.2
4.2	11.3
4.4	12.4
4.6	13.5
4.8	14.7
5.0	16.0
5.2	17.3
5.4	18.6
5.6	20.0
5.8	21.5
6.0	23.0
6.2	24.5
6.4	26.1
6.6	27.8
6.8	29.5
7.0	31.3
7.2	33.1
7.4	34.9
7.6	36.9
7.8	38.8
8.0	40.8

Select a location for the indoor unit that meets the following criteria:

1. A place with sufficient space for repair in a hung ceiling that can bear the weight of the machine.

2. A place where the air inlet and outlet are not hindered and are without influence from outdoor air.

3. A place without heat sources like smoke, fire, or toxic pollution.

4. A place where airflow can be transmitted everywhere in the room.

5. A place convenient for installation.

Select a location for the outdoor unit that meets the following criteria:

1. A place with sufficient space for installation and repair.

2. A place where the air inlet and outlet are not hindered, without strong airflow.

3. A dry and ventilated place.

4. A place where the overhanging is level and can bear the weight of the outdoor unit, without much noise.

5. A place where neighbors are not annoyed by noise and exhausted air.

6. A place without leakage of flammable gas.

7. A place convenient for installation.

Caution: Avoid locations that may cause malfunction, such as:

• Places with flammable gas leakage.

• Areas with salty air (near the coast).

• Areas with caustic gas (like sulfide) in the air.

• Places that cannot bear the weight of the machine.

• Kitchens full of oil gas.

• Areas with strong electromagnetic waves.

• Places where acid or alkaline liquid is evaporating.

• Areas where air circulation is not enough.

• Other special surroundings.

Please check that the following accessories are included with your TCL TCD125D1HWH-DV unit.

Model	Name	Quantity
TCD100 / TCD125 / TCD140 / TCD160	Hose Clamp	1
	Drain Hose	1
	Installation Manual	1
	Operation Manual	1
	Hanger Bracket Accessories Pack	1
	Pipe Insulation	2
	Wired Controller	1
	Wired controller connection cable	1

After installation is finished, take special care to check the following items to ensure proper operation and safety.

Items to be checked	If not properly done, what is likely to occur
Is the gas leak test finished?	It may result in insufficient cooling or heating.
Does the unit require external insulation?	Condensate water may drip.
Does drainage flow smoothly?	Condensate water may drip.
Does the power supply voltage correspond to that shown on the name plate?	The unit may malfunction or the components burn out.
Is the wiring and piping correct?	The unit may malfunction or the components burn out.
Is the unit safely grounded?	Dangerous during electric leakage.
Is the wiring size according to specification?	The unit may malfunction or the components burn out.
Is something blocking the air outlet or inlet of either the indoor or outdoor units?	It may result in insufficient cooling or heating.
Are refrigerant piping length and additional refrigerant charge noted down?	The refrigerant charge in the system is not clear.
Is the indoor unit positioned so that it is not in contact with parts of the ceiling?	Vibration and noise can be transmitted into building.
Is the airflow within specification?	Poor performance or malfunction.
Is an air filter installed in the return air?	Blocked heat exchanger causing malfunction or compressor failure.
Is an external drain tray installed?	Condensate water may drip.
Check and confirm that there are no R32 leak after the installation.	(Not specified)

Also, at completion, ensure you have shown the customer how to operate the system using the operation manual, reviewed the safety considerations, and handed the operation manual to the customer.

All refrigerant piping work must only be carried out by a qualified person. Where additional refrigerant is required, use only R32.

CAUTION:

• Avoid introducing air or other contaminants into the piping. If contaminants remain, the system will malfunction.

• Carry out sufficient ventilation if refrigerant gas leaks during installation.

• Use both a spanner and a torque wrench when connecting or disconnecting pipes.

• Use only a flaring block suitable for R32 tube.

• When connecting the flare nut, coat only the flare’s inner surface with ether or ester oil. Initially tighten by hand for 3 to 4 turns before firmly tightening.

• Use the flare nuts included with the indoor unit.

• Refer to the tables below for flare dimensions, proper tightening torque, and tightening angles (if a torque wrench is not available).

Table 2: Tightening Torque and Flare Dimensions

Pipe size	Tightening torque	Flare dimensions A (mm)
6.4 (1/4″)	14.2-17.2 N·m (144-175 kgf·cm)	8.6-9.0
9.5 (3/8″)	32.7-39.9 N·m (333-407 kgf·cm)	12.6-13.0
12.7 (1/2″)	49.5-60.3 N·m (504-614 kgf·cm)	15.8-16.2
15.9 (5/8″)	61.8-75.4 N·m (630-770 kgf·cm)	19.3-19.7

Not recommended but in case of an emergency (without a torque wrench):

As you tighten the flare nut with a spanner, there is a point where the tightening torque suddenly increases. From that position, further tighten the flare nut using the angle shown below. After finishing, check for gas leaks.

Table 3: Further Tightening Angle

Pipe size	Further tightening angle	Recommended arm length of tool
6.4 (1/4″)	60 to 90 degrees	Approx. 150mm
9.5 (3/8″)	60 to 90 degrees	Approx. 200mm
12.7 (1/2″)	30 to 60 degrees	Approx. 250mm
15.9 (5/8″)	30 to 60 degrees	Approx. 300mm

CAUTION: Be sure to insulate local piping all the way into the pipe connections inside the machine. Exposed piping may cause condensation or burns on contact.

WARNING: Improperly installed drain piping may result in water leaks and eventually wet furniture and belongings. After the piping work is finished, check that the drainage flows smoothly by pouring approximately 1 litre of water gradually into the drain tray.

CAUTION: For units with water pumps, you can choose between pump drainage (Fig10 ①) or natural drainage (Fig10 ②).

• If pump drainage is selected, the “Tray Drain Outlet” (②) must be blocked with the “Drain Plug”.

• If natural drainage is chosen, remove the “Drain Plug” from the “Tray Drain Outlet” (②) and unplug the “CN14” pump terminal on the circuit board. Wrap the unplugged terminal wires with insulating tape and secure them in an empty space in the electrical box to prevent contact with other components.

For Units With a Pump:

• The drain pipe outlet can be raised up to 600mm above the ceiling.

• Keep the horizontal pipe length and offset within 100mm or less to avoid overflow from water backflow when the unit stops.

General Installation:

• Keep the drain pipe short and sloping downward at a gradient of at least 1/100 to prevent air pockets.

• Secure the pipe every 1 to 1.5m to prevent sagging.

• Use the provided drain hose and clamp. Tighten the clamp firmly.

• Insulate the metal clamp with a field-supplied sealing pad.

• Insulate the drain hose inside the building.

• As a safety measure, use a safety drain tray (field supplied) and drain it separately.

• Insulate the drain pipe to prevent condensate dripping in humid conditions.

• Do not connect the drain piping directly to sewage pipes. Drainage must conform to local plumbing regulations.

All field-supplied parts, materials, and electric works must conform to local codes. Use copper wire only. All wiring must be performed by an authorized electrician.

Precautions for Wiring:

• Do not clamp wired controller cords together with wires connecting the units.

• Keep controller cords and connecting wires at least 50mm from other electric wires to avoid electrical noise.

• Use a round crimp-style terminal for connection to the power supply terminal block.

• Do not connect wires of different gauges to the same power supply terminal.

• After connecting wires, secure them with cable ties so no pressure is applied to the connections.

• Ensure the terminal box cover fits snugly without pinching any wires.

Wire Specifications and Fuse:

Indoor Unit Model	Power Supply (V/Ph/Hz)	Fuse Capacity (A)	Circuit Breaker Capacity (A)	Min. Sectional Area of Power Cord (mm²)
TCD71/85	220-240V 1~ 50Hz	8	10	0.75
TCD100/125		8	10	1.0
TCD140/160		8	10	1.5

Outdoor Unit Model	Power Supply (V/Ph/Hz)	Fuse Capacity (A)	Circuit Breaker Capacity (A)	Min. Sectional Area of Power Cord (mm²)
TCD71/85	220-240V 1~ 50Hz	30	32	2.5
TCD100/125		30	40	4
TCD140/160		30	40	4

WARNING: Power should be disconnected and tagged off when performing this procedure on an already installed unit.

To Separate the Indoor Unit:

1. Carefully remove the Airbox compartment by removing the (4) M6 bolts.

2. Carefully remove the (1) thermistor cable (R1T) from its clamp.

3. Wrap the thermistor cable and place it neatly into the rubber bush next to the fan deck.

4. Carefully disconnect the fan motor wiring from the base panel located underneath the reactor box.

5. Remove the (5) tapping screws located above the fan deck flange.

6. Remove the (4) M6 bolts securing the fan deck to the base panel of the heat exchanger compartment.

7. Carefully separate the fan deck assembly from the base panel, taking care not to damage the fan motor wiring.

8. Carefully detach the fan deck.

To Reassemble the Indoor Unit:

9. Carefully place the fan deck back in position on the base panel.

10. Secure the fan deck onto the heat exchanger compartment with the (4) M6 bolts and (5) tapping screws for the top flange of the fan deck.

11. Place the thermistor cable (R1T) back to the side of the fan deck and secure it with the thermistor clamp. Ensure the tip of the thermistor is positioned horizontally opposite the fan casing.

12. Reconnect the fan motor connector back to the connector of the base panel.

13. Carefully place the fan deck compartment with (4) M6 bolts, taking care not to damage the fan motor wiring.

Here are the explanations for the main buttons on your wired remote controller:

1. **[ON/OFF] button:** Press to turn the air conditioner on or off.

2. **[MODE] button:** Press to cycle through the running modes: AUTO -> COOL -> DRY -> FAN -> HEAT.

3. **[∧ / ∨] button:** Press ‘∧’ to increase and ‘∨’ to decrease the set temperature or time value.

4. **[FAN SPEED] button:** Press to cycle through fan speeds: Mute -> Low speed -> Medium-low speed -> Medium speed -> Medium-high speed -> High speed -> Turbo -> Auto speed.

5. **[UP-DOWN SWING]/[ENTER] button:** Press to activate or inactivate the upward-downward swing function. When setting a function, press this button to confirm the selection.

6. **[LEFT-RIGHT SWING]/[BACK] button:** Press to activate or inactivate the left-right swing function. When setting a function, press this button to return to the previous setting.

7. **[FUNCTION] button:** Press for function selection. The current function icon will blink. Use the ‘∧’ or ‘∨’ buttons to switch to the next function. If the icon is lit up permanently, the function is activated; otherwise, it is inactivated. Functions include SLEEP, I FEEL, HEALTH, ECO, GENTLE, SELF-CLEANING, 8H HEATING, and GENERATOR.

1. Press the “FUNC.” button until the parameter setting icon blinks.

2. Press the “[ENTER]” button to access the parameter setting interface. The timer zone will blink and display the current device function code, and the temperature zone will display the corresponding parameter.

3. Use the “∧” and “∨” buttons to change the device function code.

4. Press “[ENTER]” to select the target function. The temperature zone will then blink.

5. Use the “∧” and “∨” buttons to change the function parameter.

6. Press “[ENTER]” for confirmation.

7. Press “[BACK]” to exit from the parameter setting.

The following parameters can be adjusted:

Device Function Code	Device Function	Device Function Parameter	Remarks
P6	Degree Fahrenheit/Celsius display	F-C	C: Degree Celsius display F: Degree Fahrenheit display
PA	Ambient/set temperature display	00-01	00: Set temperature 01: Ambient temperature
PD	Wired controller button Buzzer switch	ON-OF	ON: Buzzer on OFF: Buzzer off
A8	Maximum backlight luminance	30~100	Percentage of maximum backlight luminance
B3	Dust full reminding	ON-OF	ON: Dust full reminding function on OFF: Dust full reminding function off
B4	Clock display setting	12-24	12: 12-hour system display 24: 24-hour system display
BA	Night quiet mode switch (on some models)	ON-OF	ON: Activate night quiet mode OFF: Deactivate night quiet mode
BB	Night quiet mode start time (on some models)	0-23	Start time selection
BC	Night quiet mode end time (on some models)	0-23	End time selection

You can set the Night Quiet Mode using the wired controller.

1. In the power on or off state, press and hold the “FAN” key and the “∨” key for 5-7 seconds to enter the parameter setting screen. The temperature display will show “01” and the time display will show a blinking “PO”.

2. Use the “∨” or “∧” keys to select the “bA” icon, which will blink.

3. Press the “[ENTER]” button. The “bA” will stop blinking, and the temperature display zone will blink.

4. Use the “∨” or “∧” buttons to select “ON” or “OF”, then press “[ENTER]” to enable or disable Night Quiet Mode.

5. After enabling, the “bA” will blink again. Use the “∨” or “∧” buttons to navigate to the “bb” icon (start time).

6. Press “[ENTER]”. The digital code in the temperature display zone will blink. Select a start time between “0” and “23”.

7. Press “[ENTER]” to confirm. Use the “∨” or “∧” buttons to navigate to the “bC” icon (end time).

8. Press “[ENTER]”. The digital code in the temperature display zone will blink. Select an end time between “0” and “23”.

9. Press “[ENTER]” to confirm. The “bC” icon will blink.

10. Press the “[BACK]” or “MODE” icon (or wait 5 seconds) to return to the normal display.

Notes:

• Night Quiet Mode is effective only in cooling or heating modes.

• It will activate at the selected start time and deactivate at the selected end time.

• The start and end times cannot be the same.

• Activating this mode may result in a slight reduction in capacity.

If the default static pressure (150 Pa) does not meet your installation duct requirements, you can adjust it using the wired controller.

1. In the power on or off state, press and hold the “FAN” key and the “∨” key for 5-7 seconds to enter the parameter setting screen.

2. Use the “∨” or “∧” keys to select the icon “PL”, which will blink.

3. Press the “[ENTER]” button. The “PL” will stop blinking, and the digital code in the temperature display zone will blink (default is “00”).

4. Use the “∨” or “∧” keys to select a number from “01” to “09” corresponding to the static pressure value you need.

5. Press the “[ENTER]” button to confirm. The “PL” icon will blink again.

6. Press the “[BACK]” or “MODE” icon (or wait 15 seconds) to return to the normal display.

Refer to the table below for the code and corresponding static pressure value.

Table 4: Static Pressure Settings via Wired Controller

Display code	00	01	02	03	04	05	06	07	08	09	10	11
Set definition	current operating static pressure value is displayed on the light pane	P1 (0Pa)	P2 (25Pa)	P3 (50Pa)	P4 (75Pa)	P5 (100Pa)	P6 (125Pa)	P7 (150Pa)	P8 (175Pa)	P9 (200Pa)	current indoor unit free static function pressure setting

The dimensions for the various models are as follows:

MODEL	A (Width)	B (Height)	C (Depth)	D	E	F	G
TCD71/85	910	804	607	421	391	380	378
TCD100/125	1010	858	660	494	462	440	436
TCD140/160	950	1339	600	409	375	354	352

The TCL TCD71~TCD160 models are pre-charged with refrigerant for 20 meters of connecting piping.

• **When the pipeline length exceeds 20 meters:** Additional refrigerant is required. The formula is:
Additional charge (kg) = {Main length (m) – 20(m)} × 0.03 (kg/m)

• **When the pipeline length is between 10m and 20m:** Refrigerant needs to be reduced for optimal performance. The formula is:
Refrigerant reduced (kg) = {20(m) – main length (m)} × 0.03 (kg/m)

• **When the pipeline length is between 5m and 10m:** Refrigerant needs to be reduced for optimal performance. The formula is:
Refrigerant reduced (kg) = {20(m) – main length (m)} × 0.03 (kg/m)

• **When the pipeline length is shorter than 5 meters:** The refrigerant shall be at the rated charge indicated on the nameplate for 5 meters of refrigerant pipeline.

Additional Charge per Meter of Pipe:

Model	Additional charge for 1m pipe (R32)/g
TCD71/85	30
TCD100/125	30
TCD140/160	30

Pipe Length and Height Drop Limits:

	TCD71/85	TCD100/125/140/160
Longest pipe (L)	50m	75m
Maximum height drop (H)	30m	30m

When the drop between indoor and outdoor units is longer than 10m, an oil return bend should be added every 6m if the outdoor unit is above the indoor unit.

If the display panel or wired control displays an error code, please refer to the following table for its meaning.

Error Code	Error Content	Error Code	Error Content
E0	Indoor and outdoor communication failure	F1	Battery module failure
E1	Indoor ambient temperature sensor failure	F2	Exhaust temperature sensor failure protection
E2	Indoor fancoil temperature sensor failure	F3	Failure protection of outer tube temperature sensor
E3	Outdoor fancoil temperature sensor failure	F4	Abnormal protection of refrigerant circulation
E4	Abnormal system malfunction(lack of fluorine)	F5	PFC protection
E5	Model configuration error	F6	Compressor missing/ reverse phase protection
E6	Indoor PG/DC fan failure	F7	Module temperature protection
E7	Outdoor ambient temperature sensor failure	F8	Abnormal commutation of four-way valve
E8	Outdoor exhaust temperature sensor failure	F9	Module temperature sensor circuit malfunction
E9	Outdoor IPM module failure/compressor drive failure	FA	Compressor phase current detection fault
EA	Outdoor current sensor failure	Fb	Cooling and heating overload protection limit / reduce frequency
Eb	PCB and display screen communication Failure	FC	High power protection limit / reduce frequency
EC	Outdoor modules Communication failure	FE	Module current (compressor phase current) protection limit / reduce frequency
EE	Outdoor EEPROM fault	FF	Module temperature protection limit / reduce frequency
EF	Outdoor DC fan failure	FH	Drive protection limit / reduce frequency
EH	Outdoor suction sensor failure	FP	Anti condensation protection limit / reduce frequency
EP	Outdoor compressor casing top failure	FU	Anti freezing protection limit / reduce frequency
EU	Outdoor voltage sensor failure	Fj	Exhaust protection limit / reduce frequency
Ej	Outdoor central coil temperature sensor failure	Fn	External AC current protection limit / reduce frequency
En	Outdoor air pipe temperature sensor failure	Fy	Fluorine deficiency protection
Ey	Outdoor liquid pipe temperature sensor failure	H1	High pressure switch malfunction
PO	IPM module protection	H2	Low pressure switch malfunction
P1	Overvoltage and undervoltage protection	bf	TVOC sensor failure
P2	Overcurrent protection	be	PM2.5 sensor failure
P3	Other protections	bj	Humidity sensor failure
P4	Protection against excessive outdoor exhaust temperature	bE	CO₂ sensor malfunction
P5	Cooling protection against overcooling	bd	Fresh air fan failure
P6	Cooling and anti overheating protection	d4	Water full protection failure
P7	Heating and anti overheating protection	d5	Access control protection
P8	Protection against high or low outdoor temperature	b5	Main fan drive communication fault
P9	Compressor drive protection (abnormal load)	Fd	Refrigerant sensor fault
PA	Communication failure/mode conflict	Hd	Refrigerant leakage protection
FO	Infrared human sensing sensor failure

If your air conditioner fails to function normally, please check the following items before calling for maintenance:

Problem	Cause	Corrective measure
The air conditioner can’t run.	If you turn off the unit and then immediately turn it on, the compressor will delay running for 3 minutes to protect it.	Please wait for a while.
	Wire connection is wrong.	Connect wires according to the wiring diagram.
	Fuse or circuit breaker is broken.	Replace the fuse or switch on the circuit breaker.
	Power failure.	Restart after power is resumed.
	Power plug is loose.	Reinsert the power plug.
	Wired controller has low battery.	Replace the batteries.

If you are experiencing poor cooling or heating performance, check the following possible causes and solutions:

Cause	Corrective measure
Air inlet and outlet of indoor or outdoor units have been blocked.	Clear the obstacles and keep the area for indoor and outdoor units well ventilated.
Improper temperature setting.	Reset to a proper temperature.
Fan speed is too low.	Reset to a proper fan speed.
Air flow direction is not right.	Change the direction of air louvers.
Doors or windows are open.	Close them.
Exposed under direct sunshine.	Put on curtains or louvers in front of the windows.
Too many heat sources in the room.	Remove unnecessary heat sources.
Filter is blocked or dirty.	Send for a professional to clean the filter.
Air inlets or outlets of the units are blocked.	Clear away obstacles that are blocking the air inlets and outlets of indoor and outdoor units.

The following situations are not operation failures and are part of the normal function of your air conditioner:

Phenomenon	Time of occurrence	Cause
Mist comes from the air conditioner.	During operation.	If the unit is running under high humidity, the wet air in the room will be quickly cooled down.
Water full protection	During operation.	When in cooling mode, if the water level is too high, the machine will shut down for protection. The water pump continues to draw water. After the water level drops, the machine returns to normal. This protection frequency is less than or equal to 3 times.
System switches to heating mode after defrosting.	Post-defrosting.	Defrosting process will generate some water, which will turn to water vapor.
The air conditioner is buzzing at the beginning of operation.	Start of operation.	The temperature controller will buzz when it starts. The noise will become weak after about 1 minute.
When the unit is turned on, it purrs.	When system is just started.	The refrigerant is not stable. After about 30 seconds, the purr of the unit becomes low.
Refrigerant brushing sound.	About 20s after enabling heating mode or during defrost.	This is the sound of the 4-way valve switching direction. It will disappear after the valve changes direction.
Hissing sound.	When the unit is started, stopped, or during/after operation.	This is the sound of gaseous refrigerant that stops flowing and the sound of the drainage system.
Crunching sound.	During and after operation.	Due to temperature change, the front panel and other components may swell, causing an abrasion sound.
Hissing sound.	When turned on or suddenly stopped during operation or after defrosting.	This is caused by refrigerant suddenly stopping or changing its flow direction.
Dust comes from the unit.	When starting after being unused for a long time.	Dust inside the indoor unit comes out with the air.
The air conditioner generates some smell.	During operation.	The room smell or the smell of cigarettes comes out through the indoor unit.