Fujitsu General Air Conditioner Error 19

⚡ Quick Answer: The Fujitsu General air conditioner error code 19 indicates an active filter abnormality, signifying a communication failure between the indoor and ou... ✅ DIY Fixable

What Does Error 19 Mean?

The Fujitsu General air conditioner error code 19 indicates an active filter abnormality, signifying a communication failure between the indoor and outdoor units. This error typically leads to the system ceasing normal operation when the active filter malfunction is detected, displaying code 19 on the service code display. Regular maintenance of the air filters can help prevent this issue.

Common Symptoms:

  • Error displayed as code 19 on the unit’s service code display
  • Air conditioner may stop normal operation when the active filter fault is detected

Possible Causes

  • Active filter malfunction (medium)

How to Fix Error 19

DIY Fix Check and clean air filters

  1. Turn off and unplug the air conditioner
  2. Open the front panel and remove the air filters
  3. Clean the filters gently using a vacuum or rinse with water if washable
  4. Ensure filters are fully dry before reinserting
  5. Restart the unit and check if the error clears

Technician Only Inspect and service active filter and related components

  1. Verify error 19 using service mode or diagnostic tools
  2. Inspect active filter assembly for faults, damage, or incorrect wiring
  3. Test active filter sensors and power supply circuits
  4. Replace active filter or associated control module if defective
  5. Clear error code and test unit operation

Parts needed: Active filter assembly, Related wiring/connectors, Control board (if required)

🛑 When to Call a Pro:
  • If error persists after cleaning filters
  • If internal components need disassembly beyond simple filter access
  • If there are signs of electrical damage or burnt components

Technical Specifications

wattage N/A
component Communication Cable
resistance N/A
part_number Fujitsu 93400-00001
voltage_rating 230V AC

Common Questions

What does 19 error mean on Fujitsu General air conditioner?

Error 19 means there is a communication failure due to an active filter abnormality, stopping normal operation.

Can I fix Fujitsu General air conditioner 19 error myself?

Yes, you can check and clean the air filters as a first step to resolve the issue.

How much does it cost to fix 19 error?

Repair costs for error 19 range from ¥5,000 to ¥30,000, depending on the model and region.

When should I call a technician for 19?

Call a technician if the error persists after cleaning filters or if there are signs of electrical damage.

Data last verified: 2026-07-01

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