• Car Service Manual
• Daikin Vrv Iv Service Manual
• Daikin Vrv 4 Service Manual

Service Manual SiE 00-07. SiE 00-07 Table of Contents i Inverter K Series. After the repair work is complete, be sure to conduct a test operation to ensure that the equipment operates normally, and explain the cautions for operating the product to the customer 1.1.1 Caution in Repair.

Index:

1. Split AC Error Codes
2. L Series AC Error Codes
3. Multi AC Error Codes
4. VRV IV 4 Error Codes
5. VRV III 3 Error Codes

1-Daikin Split AC Error Codes:

Led On Outdoor Unit PCB

2- Daikin L Series AC Error Codes:

Indoor Unit PCB Abnormality;

Remote Controller Display: A1

Supposed Causes:

• Wrong models interconnected
• Defective indoor unit PCB
• Disconnection of connector
• Reduction of power supply voltage

Remote Controller Display: A5

Supposed Causes:

• Short-circuited air
• Clogged air filter of the indoor unit
• Dust accumulation on the indoor heat exchanger
• Defective indoor heat exchanger thermistor
• Defective indoor unit PCB

Remote Controller Display: A6

Supposed Causes:

• Layer short inside the fan motor winding
• Breaking of wire inside the fan motor
• Breaking of the fan motor lead wires
• Defective capacitor of the fan motor
• Defective indoor unit PCB

Remote Controller Display: C4, C9

Supposed Causes:

• Disconnection of connector
• Defective thermistor
• Defective indoor unit PCB

Remote Controller Display: U0

Supposed Causes:

• Disconnection of the discharge pipe thermistor, indoor or outdoor heat exchanger thermistor, room or outdoor temperature thermistor
• Closed stop valve
• Refrigerant shortage (refrigerant leakage)
• Poor compression performance of compressor
• Defective electronic expansion valve

Remote Controller Display: U2

Supposed Causes:

• Supply voltage is not as specified.
• Defective DC voltage detection circuit
• Defective over-voltage detection circuit
• Defective PAM control part
• Disconnection of compressor harness
• Noise
• Momentary fall of voltage
• Momentary power failure
• Defective indoor unit PCB

Remote Controller Display: U4

Supposed Causes:

• Wiring error
• Breaking of the connection wires between the indoor and outdoor units (wire No. 3)
• Defective outdoor unit PCB
• Defective indoor unit PCB
• Disturbed power supply waveform

Remote Controller Display: U7

Supposed Causes: Defective outdoor unit PCB

Remote Controller Display: UA

Supposed Causes:

• Wrong models interconnected
• Wrong wiring of connecting wires
• Wrong indoor unit PCB or outdoor unit PCB mounted
• Defective indoor unit PCB
• Defective outdoor unit PCB

Remote Controller Display: E1

Supposed Causes:

• Defective outdoor unit PCB
• Broken harness between PCBs
• Noise
• Momentary fall of voltage
• Momentary power failure, etc

Remote Controller Display: E5

Supposed Causes:

• Defective discharge pipe thermistor
• Defective electronic expansion valve or coil
• Defective FourWay valve or coil
• Defective outdoor unit PCB
• Refrigerant shortage
• Water mixed in refrigerant
• Defective stop valve

Remote Controller Display: E6

Supposed Causes:

• Compressor locked
• Compressor harness disconnected

Remote Controller Display: E7

Supposed Causes:

• Foreign matter stuck in the fan
• Defective fan motor
• Defective outdoor unit PCB

Remote Controller Display: E8

Supposed Causes:

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• Outdoor temperature is out of operation range.
• Defective compressor
• Defective power module
• Defective outdoor unit PCB
• Short circuit

Remote Controller Display: EA

Supposed Causes:

• Disconnection of fourway valve coil
• Defective fourway valve, coil, or harness
• Defective outdoor unit PCB
• Defective thermistor
• Refrigerant shortage
• Water mixed in refrigerant
• Defective stop valve

Remote Controller Display: F3

Supposed Causes:

• Defective discharge pipe thermistor
• Defective electronic expansion valve or coil
• Refrigerant shortage
• Defective fourway valve
• Water mixed in refrigerant
• Defective stop valve
• Defective outdoor unit PCB

Remote Controller Display: F6

Supposed Causes:

• The installation space is not large enough.
• Dirty outdoor heat exchanger
• Defective outdoor fan motor
• Defective stop valve
• Defective electronic expansion valve or coil
• Defective outdoor heat exchanger thermistor
• Defective outdoor unit PCB

Remote Controller Display: H0

Supposed Causes:

• Broken or disconnected harness
• Defective outdoor unit PCB

Remote Controller Display: H6

Supposed Causes:

• Disconnection of the compressor relay cable
• Defective compressor
• Defective outdoor unit PCB
• Start-up failure caused by the closed stop valve
• Input voltage is outside the specified range.

Remote Controller Display: H8

Supposed Causes: Defective outdoor unit PCB

Remote Controller Display: H9, J3, J6, P4

Supposed Causes:

• Disconnection of the connector for the thermistor
• Defective thermistor corresponding to the error code
• Defective heat exchanger thermistor in the case of J3 error
• Defective outdoor unit PCB

Remote Controller Display: L3

Supposed Causes:

• Defective outdoor fan motor
• Short circuit
• Defective radiation fin thermistor
• Disconnection of connector
• Defective outdoor unit PCB

Remote Controller Display: L4

Supposed Causes:

• Defective outdoor fan motor
• Short circuit
• Defective radiation fin thermistor
• Disconnection of connector
• Defective outdoor unit PCB
• Silicon grease is not applied properly on the radiation fin after replacing the outdoor unit PCB.

Remote Controller Display: L5

Supposed Causes:

• Poor installation condition
• Closed stop valve
• Defective power module
• Wrong internal wiring
• Abnormal power supply voltage
• Defective outdoor unit PCB
• Defective compressor

Service Check Function

1. When the timer cancel button is held down for 5 seconds, 00 is displayed on the temperature display screen.
2. Press the timer cancel button repeatedly until a long beep sounds.

3-Daikin Multi-Split Type AC Error Codes:

Daikin’s multi-split type air conditioning systems offer superior performance, energy-efficiency, and comfort in stylish solutions conforming to all interior spaces and lifestyles. An extensive product lineup utilizes Daikin technology for lower costs and environmental impact. Advanced inverter and heat pump technologies achieve greater efficiency and energy-savings at lower costs. A broad array of models allows the perfect match of style and performance to any interior space.

2/3/4MXS-G/J Series/Heat Pump

4-Daikin VRV IV (4) Error Codes:

The following will be displayed on the screen when an error (or a warning) occurs during operation. Check the error code and take the corrective action specified for the particular model. If unit stops due to an error, the operation indicating LED on the signal receiving part of indoor unit blinks. The error code can be determined by following the procedure described below. (The error code is displayed when an operation error has occurred. In normal condition, the error code of the last problem is displayed.)

5-Daikin VRV III (3) Error Codes:

If operation stops due to malfunction, the remote controlís operation LED blinks, and malfunction code is displayed. (Even if stop operation is carried out, malfunction contents are displayed when the inspection mode is entered.)

1. Pressing the INSPECTION/TEST button will blink the check indication.

2. While in check mode, pressing and holding the ON/OFF button for a period of five seconds or more will clear the failure history indication shown above.

Daikin AC Troubleshooting

The following incidents do not indicate a malfunctioning air conditioner and have explanations. The air conditioner can continue to operate.

Case: Operation does not start soon.

Explanation: This is to protect the air conditioner. You should wait for about 3 minutes.

Case: Hot air does not fl ow out soon after the start of HEAT operation.

Explanation: The air conditioner is warming up. You should wait for 1 to 4 minutes.

Case: The HEAT operation stops suddenly and a flowing sound is heard.

Explanation: The system is taking away the frost on the outdoor unit. You should wait for about 4 to 12 minutes.

Case: The outdoor unit emits water or steam.

Explanation:

• In HEAT operation; The frost on the outdoor unit melts into water or steam when the air conditioner is in defrost operation.
• In COOL or DRY operation; Moisture in the air condenses into water on the cool surface of outdoor unit piping and drips.

Case: Mist comes out of the indoor unit.

Explanation:

• This happens when the air in the room is cooled into mist by the cold airflow during COOL operation.
• This is because the air in the room is cooled by the heat exchanger and becomes mist during defrost operation.

Case: The indoor unit gives out odor

Explanation:

• This happens when smells of the room, furniture, or cigarettes are absorbed into the unit and discharged with the airflow. If this happens, it is recommended to have the indoor unit washed by a technician. Consult the service shop where you purchased the air conditioner.

Case: The outdoor fan rotates while the air conditioner is not in operation.

Explanation:

• After operation is stopped; The outdoor fan continues rotating for another 60 seconds for system protection.
• While the air conditioner is not in operation; When the outdoor temperature is very high, the outdoor fan starts rotating for system protection.

Case: Operation stopped suddenly. (OPERATION lamp is on.)

Explanation: For system protection, the air conditioner may stop operating on a sudden large voltage fluctuation. It automatically resumes operation in about 3 minutes.

Case: No remote controller signals are displayed. Remote controller sensitivity is low. Display is low in contrast or blacked out. Display runs out of control.

Explanation: The batteries are dying and the remote controller is malfunctioning. Replace all the batteries with new size batteries, AAA.LR03 (alkaline). For details, refer to set the batteries of this manual.

Case: Possible sounds.

Explanation:

• Flowing water; Generated because the refrigerant in the air conditioner is flowing. This is a pumping sound of the water in the air conditioner and heard when the water is pumped out from the air conditioner in cooling or drying operation. The refrigerant flows in the air conditioner even if the air conditioner is not working when the indoor units in other rooms are in operation.
• Blowing; Generated when the flow of the refrigerant in the air conditioner is switched over
• Pinging; Generated when the size of the air conditioner slightly expands or shrinks as a result of temperature changes.

Case: The air conditioner does not operate

Check:

• Is a breaker off or a fuse blown?
• Is there a power failure?
• Are batteries set in the remote controller?
• Is the timer setting correct?

Case: Cooling (Heating) effect is poor

Check:

• Are the air fi lters clean?
• Is there anything to block the air inlet or the outlet of the indoor and the outdoor units?
• Is the temperature setting appropriate?
• Are the windows and doors closed?
• Are the airfl ow rate and the airfl ow direction set appropriately?

Case: Operation stopped suddenly

Daikin Vrv Iv Service Manual

Check:

• Are the air fi lters clean?
• Is there anything to block the air inlet or the outlet of the indoor and the outdoor units?
• Clean the air fi lters or take all obstacles away and turn the breaker off. Then turn it on again and try operating the air conditioner with the remote controller. If the lamp still flashes, call the service shop where you purchased the air conditioner.
• Are operation modes all the same for indoor units connected to outdoor units in the multi system?

Case: An abnormal functioning happens during operation

Check: The air conditioner may malfunction with lightning or radio waves. Turn the breaker off, turn it on again and try operating the air conditioner with the remote controller.

Case: The louvers do not immediately swing. The louvers move soon after startup

Check: The air conditioner is adjusting the louvers position. The louvers will start moving soon

Daikin Inverter Technology

Daikin Vrv 4 Service Manual

Daikin VRV Solutions History

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