Either pump stopped working or the drain pan got too dirty and clogged the pump. Answer from Kowloon9 on reddit.com
Reddit
reddit.com › r/hvacadvice › daikin ceiling unit error code a3
r/hvacadvice on Reddit: Daikin Ceiling Unit Error Code A3
July 30, 2024 -
I have a Daikin ceiling AC installed since 2017. The model number is FXMQ07PBVJU.
Since yesterday it's flashing an error code of A3, which appears to be a drainage issue when researching online. I found what appears to be a drain hole on the side of the machine. Pulled out the plug and a lot of water came out. I let the water drained for about a minute, reinstalled the plug, and turned the power back on. The error code was gone and the AC was working again, however it only lasted for a few hours before the same error code returned. I opened up the drain hole and this time again there's a lot of water that came out.
What could be the possible cause of this? If some part is broken and needs to be replaced, where can I order it?
Top answer 1 of 2
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Either pump stopped working or the drain pan got too dirty and clogged the pump.
2 of 2
1
Did you figure out how to acces the pan/pump? It is the second time that my AC did this. The first time the guys access it from the inside of the house. But i do remember what part he removed.
YouTube
youtube.com › jhp cool
DAIKIN VRV INDOOR Unit Error A3 - YouTube
A3 = Drain level control system abnormality
Published June 20, 2021 Views 19K
Daikin error code EA
152K subscribers in the hvacadvice community. A place for homeowners, renters, tenants, business owners or anyone with a general question about their… More on reddit.com
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August 25, 2024Daikin Ceiling Unit Error Code A3
Either pump stopped working or the drain pan got too dirty and clogged the pump. More on reddit.com
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Daikin
my.daikin.eu › content › dam › DASW › supportavdelningen › Felkoder_SM-TS3errorcode_chart.pdf pdf
Simple Self-Diagnosis by Malfunction Code After Sales Service Division (SM-TS3)
VRV · Package · Heat reclaim ventilator · Chiller · Fan Coil · Indoor Unit · A0 · External protection device · activated · External protection device connected to the terminal strip · T1-T2 of indoor unit is activated · k k k · A1 · Malfunction of indoor unit PCB · Defective indoor unit PCB · External factor (Noise etc.) k k k k k k · A3 ·
Daikin
daikin.com › - › media › Project › Daikin › daikin_com › products › ac › services › error_codes › pdf › sm-ts3_p7-8_howtocheck-pdf.pdf pdf
UNIT NO. 1 CODE UNIT NO. 1 3. Press MODE selector button. 4. Change the
UNIT NO. 1 · 3. Press MODE · selector button · 4. Change the · upper digit · 1. Press · INSPECTION/TEST · button · 6. Change the
Silverback Air-con
silverbackaircon.sg › home › aircon error code › daikin error code › daikin a3 error code (an ultimate guide)
Daikin A3 Error Code (An Ultimate Guide) - Silverback Air-con
November 17, 2025 - The Daikin A3 error code typically points to an ill-maintained unit, a defective drain pump, or a malfunctioning indoor thermistor. The cost of fixing an A3 error in a Daikin air conditioner can be just the price of professional aircon servicing ($150 to $250).
JustAnswer
justanswer.com › hvac › sdzex-split-system-showing-error-code-a3-brand.html
Split System A3 Error Code? Troubleshooting Help & Fix Guide
July 5, 2025 - The A3 error on the FXM024TBVJU indicates a communication fault between indoor and outdoor units. Check wiring connections for looseness or damage. Inspect the PCB boards for signs of moisture or corrosion.
RemoveandReplace.com
removeandreplace.com › home › home air conditioning › daikin air conditioner ac error codes
DAIKIN Air Conditioner AC Error Codes
December 22, 2022 - AO Indoor Error of external protection device A1 Indoor PCB defect A3 Indoor Malfunction of drain Level control system A5 Indoor Freeze-up prevention A6 Indoor Fan motor lock – overload A7 Indoor Malfunction of swing motor flap A9 Indoor ...
Daikin ONE
daikinone.com › smart_thermostats › oneplus › pros › PhaseTwoErrorCodes.pdf pdf
Climate Talk Fault Code Dealer error code Possible causes Corrective actions
VRV, RA, Altherma · A3 · 0x13 · Float switch error · •Drain clogging. •Defective drain pump. •Defective float switch. •Defective indoor unit PCB. •208~230 VAC power is not provided. •Check drain for clog. •Check drain pump and replace if needed.
Star-supply
star-supply.com › content › Daikin-Troubleshooting Codes.pdf pdf
Trouble Shooting www.climatecenter.co.uk Daikin Trouble Shooting Guide
Daikin Fault Codes · Indoor Fault Codes · Fault Code · Definition · Supposed Causes · Split · Skyair · VRV · Package · A0 · External protection active · External protection wired to T1-T2 active · • · • · • · A1 · Failure of indoor PCB · Defect of PCB or noise · • · • · • · • · A3 ·
HVAC Toolkit
hvactoolkit.org › home › resources › error codes › daikin
Daikin Error Codes - Complete Fault Code List & Solutions | HVAC Toolkit
VRV systems store fault history ... refrigerant leak · U4: Communication error - check S1/S2 wiring · A3: Drain issue - clean drain line and pan ·...
Coolautomation
support.coolautomation.com › hc › en-us › articles › 6050902175133-Daikin-system-connection-configuration-and-error-messages
Daikin system connection, configuration and error messages – CoolAutomation English
May 16, 2024 - Indoor Group Address (centralized address) is required for proper CoolMasterNet operation. Without Group Address Indoor unit is not visible and can not be controlled by CoolMasterNet or any other Daikin equipment.
CoolAutomation
coolautomation.com › blog › daikin error codes: comprehensive breakdown
Daikin Error Codes (Malfunction Self-Diagnosis)
July 20, 2025 - Easily identify Daikin HVAC system faults with this complete list for simple self-diagnosis & troubleshooting. Includes VRV, SkyAir, HRV systems, and more.
Vrf
e-vrf.com › products tagged “daikin vrv error code a3”
daikin vrv error code a3 Tag - Vrf Sistem
DAIKIN VRV · Outdoor Unit · Internal Unit · Control Elements · MITSUBISHI VRF · Outdoor Unit · Internal Unit · Control Elements · CARRIER VRF · Outdoor Unit · Internal Unit · Control Elements · Samsung Vrf · Outdoor Unit · Internal Unit · Control Elements ·
Airway Group
airway-group.co.uk › home › help & advice › daikin air conditioning fault codes explained [infographic]
Daikin Air Conditioning Fault Codes Explained [Infographic] | Airway
April 2, 2026 - A1 – Micro-computer in PCB is not working – this is a fault that occurs either in the assembly of the PCB or due to an external factor, such as noise. A3 – Drain level is too high – This is caused by a clogging of dirt in the drain, ...
Daikin
daikin.com › products › ac › services › error_codes
Error Codes | After Sales Service | Air Conditioning and Refrigeration | Daikin Global
Error Code Search offers information on the cause of the malfunction and the status of your air conditioner by entering the error code.
Beaconsaves
beaconsaves.com › blog › daikin-mini-split-a3-error-code
Daikin Mini Split A3 Error Code: What It Means & What to Check | Beacon Services & Appliances
March 6, 2026 - A: On many Daikin mini split systems, A3 usually points to a drain problem.
Parts Town
partstown.com › cm › resource-center › guides › gd2 › daikin-air-conditioner-fault-codes
Daikin Air Conditioner Fault Codes | Parts Town
Not certain what the flashing code on equipment means? Parts Town is here to help with some tips for Daikin air conditioner fault code troubleshooting.
Daikin India
daikinindia.com › product-services › product-services › error-codes
Error Codes | Daikin
Fault diagnosis by remote controller The remote controller can receive relevant error codes from the indoor unit.
Fixya
fixya.com › home › forum › heating & cooling
SOLVED: What is a3 error code for daikin? drain level is - Heating & Cooling | Fixya
November 2, 2015 - What is a3 error code for daikin? drain level is ok, Floate valve and water level also ok. so anyone help me what - Heating & Cooling question
Daikin NZ
daikin.co.nz › blogs › knowledge-base › what-is-a-a3-fault
What is a A3 fault? – Daikin NZ
February 24, 2025 - Fault A3 is Indoor unit PCB Abnormality For more information open the Daikin Service App on your mobile. 1. Ensure you are logged into the Daikin Service App. You will see Engineer as below.