Hitachi Air Conditioner Error P2

⚡ Quick Answer: The Hitachi air conditioner error code P2 typically indicates a drain pan overflow, leading to the unit stopping operation during heating or cooling. ... ✅ DIY Fixable

What Does Error P2 Mean?

The Hitachi air conditioner error code P2 typically indicates a drain pan overflow, leading to the unit stopping operation during heating or cooling. This may be accompanied by unusual sounds or a water leak. It can also suggest an inverter protection fault related to compressor overcurrent or overheating, or a communication error between the indoor and outdoor units. Basic troubleshooting includes resetting the unit and ensuring clear airflow to the outdoor unit.

Common Symptoms:

  • Unit stops operation and displays P2 during heating or cooling.
  • Often seen on inverter-type Hitachi AC units when protection trips.

Possible Causes

  • Inverter/Compressor protection fault (IPM overcurrent/overheat) (low)
  • Indoor–outdoor communication interruption (low)

How to Fix Error P2

DIY Fix Basic checks before professional service

  1. Turn off the air conditioner and disconnect from power for a few minutes to reset the unit.
  2. Ensure the outdoor unit’s airflow is not obstructed and that vents are clear.
  3. Check that remote and indoor unit display connections appear normal.

Technician Only Diagnose inverter/compressor and communication systems

  1. Use service diagnostic tools to check inverter current and IPM module temperatures.
  2. Inspect wiring between indoor and outdoor units for continuity, secure connectors, and absence of damage.
  3. Test outdoor unit components (IPM, compressor, communication board) under load to isolate the fault.

Parts needed: IPM module, Communication signal wiring, Control boards

🛑 When to Call a Pro:
  • If P2 persists after basic reset and airflow checks
  • If unusual noises or electrical odors accompany the error

Technical Specifications

wattage 2000W
component Drain Pan
resistance N/A
part_number HAC-123456
voltage_rating 220V AC

Common Questions

What does P2 error mean on Hitachi air conditioner?

P2 indicates a drain pan overflow, stopping the unit during operation and possibly causing unusual sounds.

Can I fix Hitachi air conditioner P2 error myself?

Yes, try resetting the unit and checking for airflow obstructions before seeking professional help.

How much does it cost to fix P2 error?

Repair costs range from ¥10,000 to ¥50,000+, depending on the parts that need replacement.

When should I call a technician for P2?

Call a technician if the P2 error persists after basic troubleshooting or if you notice unusual noises or odors.

Sources & References

Data last verified: 2026-07-01

User Comments (0)

Share your experience or solution below.

Be the first to comment!