Daikin Air Conditioner Error CA

⚡ Quick Answer: The Daikin Air Conditioner CA error indicates a compressor overload protection issue, often linked to a malfunctioning humidity sensor or outgoing air... ✅ DIY Fixable

What Does Error CA Mean?

The Daikin Air Conditioner CA error indicates a compressor overload protection issue, often linked to a malfunctioning humidity sensor or outgoing air thermistor. This error usually presents with the CA code displayed on the unit or remote, and may cause impaired humidity and temperature sensing, leading to ineffective cooling and unusual humming sounds.

Common Symptoms:

  • Error code CA displayed on remote or unit
  • Indoor unit may continue to operate with impaired humidity/temperature sensing
  • Possible incorrect humidity or airflow control

Possible Causes

  • Humidity sensor malfunction at the discharge/outlet (medium)
  • Outgoing air thermistor (temperature sensor) fault (medium)

How to Fix Error CA

DIY Fix Basic power cycle and check

  1. Turn off the air conditioner using the remote control.
  2. Switch off the dedicated breaker or unplug the unit.
  3. Wait about 1–2 minutes.
  4. Restore power and restart the unit to see if the error clears.

Technician Only Inspect and test indoor sensors and connections

  1. Check the humidity sensor at the discharge/outlet for proper operation and signal.
  2. Test the outgoing air thermistor (temperature sensor) if present in the model.
  3. Inspect connectors and wiring for loose contacts or corrosion.
  4. Replace defective sensor(s) as necessary.

Parts needed: Humidity sensor, Thermistor (outgoing air temperature sensor), Wiring/connectors

🛑 When to Call a Pro:
  • If the error persists after a proper power reset
  • If there is evidence of sensor wiring damage or moisture ingress
  • If the unit exhibits other fault indicators alongside CA

Technical Specifications

wattage 2000W
component Compressor
resistance 5-10 ohms
part_number DAIKIN 4F200A
voltage_rating 230V AC

Common Questions

What does CA error mean on Daikin Air Conditioner?

The CA error indicates a compressor overload due to humidity sensor or thermistor malfunctions.

Can I fix Daikin Air Conditioner CA error myself?

Yes, you can perform a basic power cycle to reset the unit.

How much does it cost to fix CA error?

Repair costs range from ¥5,000 to ¥25,000+, depending on parts and labor.

When should I call a technician for CA?

Call a technician if the error persists after a reset or if there are signs of wiring damage.

Data last verified: 2026-07-01

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