Mitsubishi Air Conditioner Error PA

⚡ Quick Answer: The Mitsubishi Air Conditioner error code PA indicates a compressor overload protection issue, often related to a drain system malfunction leading to ... ✅ DIY Fixable

What Does Error PA Mean?

The Mitsubishi Air Conditioner error code PA indicates a compressor overload protection issue, often related to a drain system malfunction leading to water accumulation or leakage. Symptoms include the PA code displayed, potential system shutdown, and unusual humming sounds. Addressing this issue promptly can prevent further damage and restore normal operation.

Common Symptoms:

  • Error code PA displayed on unit or remote controller
  • Possible system shutdown or interruption of normal operation
  • Indication of water accumulation, drain pan issues or leakage

Possible Causes

  • Drain system issue leading to water accumulation or leak detection (medium)

How to Fix Error PA

DIY Fix Check drain and leakage paths

  1. Turn off the air conditioner and disconnect power before inspecting.
  2. Check the drain pipe and pan for blockages, incorrect slope, or visible water accumulation.
  3. Inspect the drain sensor and clean any debris that may interfere with sensing.
  4. Clear any obstructions and ensure proper drainage.

Technician Only Service drain sensors and related components

  1. Confirm PA error with diagnostic tools and system logs.
  2. Inspect drain pan float switches and wiring for proper operation.
  3. Test and replace faulty drain sensors or float switches as needed.
  4. Inspect and if necessary replace drain pumps or piping that are malfunctioning.

Parts needed: drain sensor / float switch, drain pump (if present), drain piping

🛑 When to Call a Pro:
  • If water leakage is observed or water damage risk is present
  • If the PA error persists after basic drain and sensor cleaning
  • If the unit fails to restart normally after corrective attempts

Technical Specifications

wattage 2000W
component Compressor
resistance 5-10 ohms
part_number Mitsubishi 5R00A
voltage_rating 230V AC

Common Questions

What does PA error mean on Mitsubishi Air Conditioner?

The PA error indicates a compressor overload protection issue, often due to water accumulation or drain system failure.

Can I fix Mitsubishi Air Conditioner PA error myself?

Yes, you can check for blockages in the drain and clean the drain sensor as a DIY action.

How much does it cost to fix PA error?

Repair costs can range from ¥5,000 to ¥30,000+, depending on parts and labor required.

When should I call a technician for PA?

Call a technician if leakage is observed, the PA error persists after cleaning, or if the unit fails to restart normally.

Data last verified: 2026-07-01

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