background image

Before making an inquiry or a request for repair, please check the following.
If the problem persists, consult your dealer.

Not a problem

This case is not a problem.

Check

Please check again before requesting 
repairs.

Case

Description / what to check

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.

Air does not come out�

 

„

In HEAT operation

• 

The air conditioner is warming up. Wait for about 1 to 4 minutes.

•  During defrosting operation, hot air does not fl ow out of the indoor unit.

 

„

When the air conditioner operates immediately after the circuit breaker is turned on

• 

The air conditioner is preparing to operate. Wait for about 3 to 20 minutes.

The HEAT operation stops suddenly 

and a fl owing sound is heard.

• 

The system is taking away the frost on the outdoor unit.

You should wait for about 4 to 12 minutes.

The outdoor unit emits water or 

steam�

„

 In HEAT mode

 

•  The frost on the outdoor unit melts into water or steam when the air conditioner is in defrost 

operation.

„

 In COOL or DRY mode

 

• 

Moisture in the air condenses into water on the cool surface of outdoor unit piping and drips.

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 cooling 

operation.

The indoor unit gives out odor�

„

 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 
your dealer where you bought the air conditioner.)

The outdoor fan rotates while the 

air conditioner is not in operation�

„

 After operation is stopped:

 

•  The outdoor fan continues rotating for another 1 minute 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 operation stopped suddenly�

(OPERATION 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.

The air conditioner does not 

operate�

(OPERATION lamp is off�)

•  Hasn’t the circuit breaker turned OFF or a fuse blown?
•  Isn’t it a power failure?
•  Are batteries set in the remote controller?
•  Is the timer setting correct?

Cooling (Heating) effect is poor�

 •  Are the air fi lters clean?
 •  Is there anything blocking 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 air direction set appropriately?

Operation stops suddenly�

(OPERATION lamp fl ashes.)

 •  Are the air fi lters clean?
 •  Is there anything blocking 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 circuit breaker OFF. Then turn it ON 

again and try operating the air conditioner with the remote controller. If the lamp still blinks, 
call your dealer 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 blink.
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 blinking after the above steps, there is no malfunction.

Troubleshooting

       English

01_EN_3P500431-1.indd   9

10/12/2017   11:57:51

Summary of Contents for FDMQ12RVJU

Page 1: ...oy year round comfort Enjoy year round comfort Enjoy year round comfort Enjoy year round comfort DAIKIN ROOM AIR CONDITIONER OPERATION MANUAL English Fran ais Espa ol MODELS FDMQ09RVJU FDMQ12RVJU FDMQ...

Page 2: ...in equipment or property damage accidents only DANGER Do not install the unit in an area where flammable materials are present due to risk of explosion resulting in serious injury or death Any abnorm...

Page 3: ...t from lightning or other sources may cause damage to the air conditioner Be sure to install a ground fault circuit interrupter Failure to install a ground fault circuit interrupter may result in elec...

Page 4: ...ith a mist of mineral oil such as cutting oil b Locations such as coastal areas where there is a lot of salt in the air c Locations such as hot springs where there is a lot of sulfur in the air d Loca...

Page 5: ...r temperature sensor back Model name Indoor Unit a b c d e f g h i j k l m a Drain discharge device built in g Refrigerant piping b Drain pan inspection window h Drain piping c Remote controller Wired...

Page 6: ...ng active Refer to Priority room setting on the next page NIGHT QUIET mode Available only for COOL operation NIGHT QUIET mode requires initial programing during installation Please consult your retail...

Page 7: ...erent operation mode from other rooms Example Room A is the priority room in this example When COOL operation is selected in room A while operating the following modes in room B C and D Operation mode...

Page 8: ...d accessory Do not attach objects other than the genuine air filter e g kitchen paper to the air inlet Otherwise the performance of the air conditioner will be degraded and icing or water leakage may...

Page 9: ...select FAN operation When a multi outdoor unit is connected make sure the HEAT operation is not being used in other rooms before you use the FAN operation Page 5 2 Press the ON OFF button and start o...

Page 10: ...an rotates while the air conditioner is not in operation After operation is stopped The outdoor fan continues rotating for another 1 minute for system protection While the air conditioner is not in op...

Page 11: ...may result in problems electric shock or fire Consult the dealer where you bought the air conditioner Do not attempt to repair or modify the air conditioner by yourself Incorrect work may result in e...

Page 12: ...The two dimensional bar code is a manufacturing code 3P500431 1 M17B178 1711 HT...

Reviews: