Daikin FBA35A2VEB Operation Manual

Also see for FBA100A2VEB: Installation manual Operation manual

Contents

Daikin FBA35A2VEB Operation Manual Manual pdf 7 page image

6 TroubleshootingOperation manual7FBA35~140A2VEB+FBA35~71A2VEB9Split system air conditioners4P456964-1C – 2018.08Malfunction MeasureThe system operatesbut cooling or heatingis insufficient.▪ Check if air inlet or outlet of outdoor orindoor unit is not blocked by obstacles.Remove any obstacles and make surethe air can flow freely.▪ Check if the air filter is clogged. Contactyour dealer to clean the air filter (refer to"Maintenance" in the indoor unit manual).▪ Check the temperature setting. Refer tothe manual of the user interface.▪ Check if the fan speed setting is set tolow speed. Refer to the manual of theuser interface.▪ Check if the air flow angle is proper.Refer to the manual of the user interface.▪ Check for open doors or windows. Closedoors and windows to prevent wind fromcoming in.▪ Check if direct sunlight enters the room.Use curtains or blinds.▪ Check if there are too many occupants inthe room during cooling operation. Checkif the heat source of the room isexcessive.▪ If the heat source of the room isexcessive (when cooling). Cooling effectdecreases if heat gain of the room is toolarge.Operation stopssuddenly. (Operationlamp blinks.)▪ Check if the air filter is clogged. Contactyour dealer to clean the air filter (refer to"Maintenance" in the indoor unit manual).▪ Check if air inlet or outlet of outdoor orindoor unit is not blocked by obstacles.Remove any obstacles, turn the breakerOFF and back ON. If the lamp still blinks,contact your dealer.▪ Check if all indoor units connected tooutdoor unit in the multi-system areoperating in the same mode.An abnormal functionhappens duringoperation.▪ The air conditioner may malfunctionbecause of lightning or radio waves. Turnthe breaker OFF and back ON.If after checking all above items, it is impossible to fix the problemyourself, contact your installer and state the symptoms, the completemodel name of the unit (with manufacturing number if possible) andthe installation date (possibly listed on the warranty card).6.1 Symptoms that are NOT systemmalfunctionsThe following symptoms are NOT system malfunctions:6.1.1 Symptom: The system does not operate▪ The air conditioner does not start immediately after the ON/OFFbutton on the user interface is pressed. If the operation lamplights, the air conditioner is in normal condition. It does not restartimmediately because one of its safety devices actuates to preventthe air conditioner from being overloaded. The air conditioner willturn on again automatically after 3 minutes.▪ The air conditioner does not start immediately after the powersupply is turned on. Wait 1 minute until the microcomputer isprepared for operation.▪ The air conditioner does not restart immediately when thetemperature setting button is returned to its former position afterpushing. It does not restart immediately because one of its safetydevices actuates to prevent the air conditioner from beingoverloaded. The air conditioner will turn on again automaticallyafter 3 minutes.▪ The outdoor unit has stopped. This is because the roomtemperature has reached the set temperature. The unit switchesto fan operation. " " (external control icon) is displayed onthe user interface and the actual operation is different from theuser interface setting. For multi-split models, the microcomputerexecutes the following control depending on the operation modeof other indoor units.▪ The fan speed is different from the setting. Pressing the fan speedcontrol button does not change the fan speed. When the roomtemperature reaches the set temperature in heating mode or theunit’s maximum capacity is reached, the outdoor unit will stopoperation and the indoor unit will operate in fan only mode (lowfan speed). In case of multi-split, the indoor unit alternatelyoperates in fan stop mode and fan only mode (LL= low fanspeed). This is to prevent the cool air from being blown directlyonto anyone present in the room.6.1.2 Symptom: White mist comes out of a unit(Indoor unit)▪ When humidity is high during cooling operation (in oily and dustyplaces). If the interior of an indoor unit is extremely contaminated,the temperature distribution inside a room becomes uneven. It isnecessary to clean the interior of the indoor unit. Ask your dealerfor details on cleaning the unit. This operation requires a qualifiedservice person.▪ When the air conditioner is changed over to heating operationafter defrost operation. Moisture generated by defrost becomessteam and exits.6.1.3 Symptom: Dust comes out of the unitWhen the unit is used for the first time in a long time. This isbecause dust has gotten into the unit.6.1.4 Symptom: The units can give off odoursThe unit can absorb the smell of rooms, furniture, cigarettes, etc.,and then emit it again.6.1.5 Symptom: The operation stoppedsuddenly (Operation lamp is on)The air conditioner may stop for system protection due to largevoltage fluctuation. It automatically resumes operation after about 3minutes.6.1.6 Symptom: The outdoor fan rotates whilethe air conditioner is not in operation▪ After operation has stopped. The outdoor fan continues torotate for another 30 seconds for system protection.▪ While the air conditioner is not in operation. When the outdoortemperature is very high, the outdoor fan starts to rotate forsystem protection.6.1.7 Symptom: The heating operation stopssuddenly and a flowing sound is heardThe system is removing frost on the outdoor unit. You should wait forabout 3 to 8 minutes.