AC Error Codes → Daikin
Daikin AC Error Codes — Complete List & Fixes
Daikin error codes appear on the remote display when you press the cancel/diagnosis button, or on the indoor unit display. Letter + number combinations identify the faulty section.
17 codes explained · DIY checks included · Same-day Daikin AC repair in Ahmedabad
👆 Select your AC brand and type the code shown on your AC display or remote
All Daikin AC Error Codes
Refrigerant shortage detected
Likely causes: Gas leak, blocked refrigerant piping
What to do: AC will cool poorly. Gas top-up alone is not a fix — the leak must be found and sealed first.
📱 Book Same-Day Repair for U0Supply voltage problem
Likely causes: Low/high mains voltage, power fluctuation
What to do: Check with a stabilizer or have your supply checked. Restart after voltage normalises.
📱 Book Same-Day Repair for U2Indoor-outdoor transmission failure
Likely causes: Wiring fault, PCB failure, incorrect connection after relocation
What to do: Restart at the MCB once. If it repeats, the interconnecting cable and PCBs need testing.
📱 Book Same-Day Repair for U4Indoor PCB defective
Likely causes: Board failure, moisture damage
What to do: Indoor control board replacement required.
📱 Book Same-Day Repair for A1Drain level system abnormal
Likely causes: Clogged drain, faulty drain pump or float switch
What to do: Check for water around the indoor unit; drain cleaning usually resolves it.
📱 Book Same-Day Repair for A3Freeze-up / high-pressure protection
Likely causes: Dirty filters, low gas, blocked airflow
What to do: Clean the air filters first. If the error returns, gas pressure needs checking.
📱 Book Same-Day Repair for A5Indoor fan motor abnormal
Likely causes: Fan motor or motor driver failure
What to do: Needs fan motor inspection/replacement.
📱 Book Same-Day Repair for A6Indoor heat-exchanger thermistor fault
Likely causes: Sensor failure or loose connector
What to do: Quick sensor replacement by a technician.
📱 Book Same-Day Repair for C4Suction air thermistor fault
Likely causes: Room temperature sensor failure
What to do: Sensor replacement required; AC may overcool or undercool until fixed.
📱 Book Same-Day Repair for C9Outdoor PCB defective
Likely causes: Outdoor control board failure
What to do: Outdoor board diagnosis and replacement.
📱 Book Same-Day Repair for E1High-pressure switch activated
Likely causes: Blocked condenser, outdoor fan failure, overcharge
What to do: Switch off and clean the outdoor unit. If it repeats, call for service immediately.
📱 Book Same-Day Repair for E3Compressor motor overload
Likely causes: High ambient temperature, low gas, failing compressor
What to do: Switch the unit off to prevent compressor damage and book a visit.
📱 Book Same-Day Repair for E5Compressor startup failure (lock)
Likely causes: Seized compressor, faulty starting components
What to do: Do not keep retrying — call for service.
📱 Book Same-Day Repair for E6Outdoor fan motor fault
Likely causes: Fan motor failure, obstruction
What to do: Check for visible obstruction in the outdoor fan; otherwise needs motor replacement.
📱 Book Same-Day Repair for E7Discharge pipe temperature abnormal
Likely causes: Low refrigerant, blocked piping
What to do: Needs gas-pressure check by a technician.
📱 Book Same-Day Repair for F3Compressor position sensor error
Likely causes: Sensor or inverter driver fault
What to do: Inverter board diagnosis required.
📱 Book Same-Day Repair for H6Inverter instantaneous overcurrent
Likely causes: Compressor short, inverter PCB failure
What to do: Switch off the unit and book an inspection.
📱 Book Same-Day Repair for L5Disclaimer: error codes can vary by model and year. This guide covers the most common Daikin split AC codes in India. When in doubt, send us a photo of your AC display on WhatsApp — diagnosis advice is free.
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