Daikin Air Conditioner Troubleshooting


Indoor unitThe flaps do not start swing immediately.
The air conditioner is adjusting the flaps position. The flaps will start moving soon.

The air conditioner stops generating airfl ow during operation.
Once the set temperature is reached, the airflow rate is reduced and operation stopped in order to avoid generating cool airfl ow (during heating) or in order to keep the humidity from rising (during cooling). Operation will resume automatically when the indoor temperature rises or falls.

Operation does not start soon
When “ON/OFF” button was pressed soon after operation was stopped.
When the mode was reselected. This is to protect the air conditioner.
You should wait for about 3 minutes

The HEAT operation stops suddenly and a fl owing sound is heard.
The outdoor unit is taking away the frost. The HEAT operation starts after the frost on the outdoor unit is removed. You should wait for about 4 to 12 minutes

A sound is heard.
A sound like a flow of water
• This sound is 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 fl ows in the air conditioner even if the air conditioner is not working when the indoor units in other rooms are in operation

Blowing sound
• This sound is generated when the flow of there frigerant in the air conditioner is switched over.
Pinging sound
• This sound is generated when the size of the air conditioner slightly expands or shrinks as a result of temperature changes.
Whistling sound
• This sound is generated when refrigerant flows during defrosting operation.
Clicking sound during operation or idle time
• This sound is generated when the refrigerant control valves or the electrical parts operate.
Clopping sound
• This sound is heard from the inside of the air conditioner when the exhaust fan is activated while the room doors are closed. Open the window or turn off the exhaust fan.

Outdoor unit

The outdoor unit emits water or steam.

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.

Operation stopped suddenly. (Multi-monitor lamp fl ashes.)
• Are the air fi lters clean?
Clean the air fi lters.
• Is there anything to block the air inlet or the outlet of the indoor and the outdoor units?
• Turn the bleaker off and take all obstacles away. Then turn it on again and try operating the air conditioner with the remote controller. If the lamp still fl ashes, call the service shop where you bought the air conditioner.
• Are operation modes all the same for indoor units connected to outdoor units in the multi system? If not, set all indoor units to the same operation mode and confi rm that the lamps flash. Moreover, when the operation mode is in AUTO, set all indoor unit operation modes to COOL or HEAT for a moment and check again that the lamps are normal. If the lamps stop fl ashing after the above steps, there is no malfunction.

Cooling (Heating) effect is poor.
• 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?

Front panel does not open. (Multi-monitor lamp fl ashes.)
• Is there something caught in the front panel? Remove the object and attempt operation again using the remote controller. If the front panel still does not open and the multimonitor lamp is still fl ashing, consult the service shop where you bought the air conditioner.




An abnormal functioning happens during operation.
• 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.

Front panel does not close completely.
• Are the front panel locks setting appropriately?

Hot air does not fl ow out soon after the start of HEAT operation.
• The air conditioner is warming up. You should wait for 1 to 4 minutes. (The system is designed to start discharging air only after it has reached a certain temperature.)

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

The ON/OFF TIMER does not operate according to the settings.
• Check if the ON/OFF TIMER and the WEEKLY TIMER are set to the same time. Change or deactivate the settings in the WEEKLY TIMER.

The indoor unit gives out odour.
• This happens when smells of the room, furniture, or cigarettes are absorbed into the unit and discharged with the airfl ow. ( If this happens, we recommend you to have the indoor unit washed by a technician. Consult the service shop where you bought the air conditioner.)

Operation stopped suddenly. (Multi-monitor lamp is on.)
• For system protection, the air conditioner may stop operating on a sudden large voltage fl uctuation. It automatically resumes operation in about 3 minutes.

If the front panel is closed while the air conditioner is in operation, the air conditioner will stop operating and the multi-monitor lamp will blink.
• Restart the air conditioner after stopping the operation of the air conditioner with the remote controller

Mist comes out of the indoor unit.
• This happens when the air in the room is cooled into mist by the cold airfl ow during COOL operation.
• This is because the air in the room is cooled by the heat exchanger and becomes mist during defrost operation

Remote controller does not work properly.
No remote controller signals are displayed.
The remote controller sensitivity is low.
The display is low in contrast or blacked out.
The display runs out of control.
• The batteries are dying and the remote controller is malfunctioning. Replace all the batteries with new, size AAA.LR03 (alkaline). For details, refer to set the batteries of this manual.

Fault diagnosis by remote controller

SYSTEM
00 NORMAL
U0 REFRIGERANT SHORTAGE
U2 OVER-VOLTAGE DETECTION
U4 SIGNAL TRANSMISSION ERROR (BETWEEN INDOOR AND OUTDOOR UNIT)

INDOOR UNIT
A1 INDOOR UNIT PCB ABNORMALITY
A5 FREEZE-UP PROTECTION OR HEATING PEAK-CUT CONTROL
A6 FAN MOTOR (DC MOTOR) ABNORMALITY
C4 INDOOR HEAT EXCHANGER THERMISTOR ABNORMALITY
C7 FRONT PANEL OPEN /CLOSE FAULT
C9 ROOM TEMPERATURE THERMISTOR ABNORMALITY

OUTDOOR UNIT
EA FOUR WAY VALVE ABNORMALITY
E1 OUTDOOR UNIT PCB ABNORMALITY
E5 OL ACTIVATION (COMPRESSOR OVERLOAD)
E6 COMPRESSOR LOCK
E7 DC FAN LOCK
F3 DISCHARGE PIPE TEMPERATURE CONTROL
H0 COMPRESSOR SYSTEM SENSOR ABNORMALITY
H6 POSITION SENSOR ABNORMALITY
H8 DC VOLTAGE / CURRENT SENSOR ABNORMALITY
H9 OUTDOOR TEMPERATURE THERMISTOR ABNORMALITY
J3 DISCHARGE PIPE THERMISTOR ABNORMALITY
J6 OUTDOOR HEAT EXCHANGER THERMISTOR ABNORMALITY
L4 RADIATION FIN TEMPERATURE RISE
L5 OUTPUT OVERCURRENT DETECTION
P4 RADIATION FIN THERMISTOR ABNORMALITY






10 Responses to Daikin Air Conditioner Troubleshooting

  1. s a s wasantha says:

    mobail

  2. KYAW HTUN says:

    how to settle j2 fault

  3. SUDHIR KHOSLA says:

    My Daikin invertor AC becomes a liability when it rains or humidity level goes up. It does not start when we give command thru remote. Green light blinks and keeps on blinking but the unit does not cool.Kindly help me out.

    • Ugo says:

      Hello Sudhir, it is raining here in Montreal and we have the same problem: blinking green light and nothing works. Does anyone have a solution? Thanks!

  4. Shamim says:

    It’s been only 1 year and 3 months and AC is not working well.

  5. Vinay says:

    The green light blinks and Ac doesn’t cool and shuts off on cool mode. Fan works on dry mode

  6. mohamed musaid says:

    12000btu daikine airconditioner outdoor unit compressor is not working what is the soliution

  7. Linnea says:

    I have an A5 error code, how do I proceed?

  8. Barrie Hildebrandt says:

    Fan speed very slow when set on high, and also very slow when set on auto?

  9. selvam says:

    Our daikin invert ac first time300psi L5AFTER GAS DOWN 250PSI IDEAL AFTER H6 ERROR HOW RECTIFY THIS

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