Daikin Air Conditioner Error P1
⚡ Quick Answer: The Daikin air conditioner P1 error indicates a drainage issue, often linked to a power supply voltage imbalance or an open phase condition, typically... ✅ DIY Fixable
What Does Error P1 Mean?
The Daikin air conditioner P1 error indicates a drainage issue, often linked to a power supply voltage imbalance or an open phase condition, typically occurring at the outdoor unit. Symptoms include the air conditioner failing to start or stopping unexpectedly, possible abnormal sounds, and no signs of overheating or refrigerant issues. Immediate action is required to address these electrical supply problems to ensure proper operation.
Common Symptoms:
- Air conditioner does not start or stops operation when P1 is shown on controller/display
- Possible abnormal sound or operational interruption when error occurs
- No immediate overheating or refrigerant‑related symptom indicated specifically by P1
Possible Causes
- Supply voltage imbalance or open phase in three‑phase power supply (high)
- Unstable or abnormal external power source (medium)
- Internal electrical component faults when supply voltage is normal (medium)
How to Fix Error P1
DIY Fix Check basic power supply conditions
- Ensure the unit is switched off before inspecting power supply.
- Verify proper three‑phase power presence with main breaker and panel labels.
- Check for blown fuses or tripped breakers supplying the air conditioner.
- Note any recent outages, lightning strikes, or power fluctuations at the building.
Technician Only Measure and correct supply voltage imbalance, inspect electrical components
- Using appropriate instruments (voltage meter or memory recorder), confirm individual phase voltages and phase sequence.
- Ensure voltage balance and phase presence meet Daikin specifications for the model.
- Inspect the outdoor unit power terminal, main circuit capacitor, and inverter board for damage or signs of electrical stress.
- Correct any loose connections, replace damaged capacitors or inverter boards as applicable.
Parts needed: Voltage measuring tools (for diagnostics), Replacement capacitor, Replacement inverter board or power terminal components
- If P1 persists after checking external supply power balance
- If there are signs of electrical burning, smell, or visible damage to unit wiring
- When the user lacks equipment or training to safely diagnose electrical supply
Next step
Choose the next step for P1
Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.
Most relevant component to inspect
Capacitor
Stores electrical energy to assist in starting or running the motor efficiently.
- Typical part-only price
- $15 - $35
- DIY difficulty
- Easy
- Estimated time
- 10-20 mins
Where can I find the model number?
Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.
Verify the complete model and part number on the retailer's compatibility page before ordering.
Other parts options
Check related components first; use model search as a fallback.
Model-compatible Air Conditioner parts
Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. We may earn a commission from other qualifying purchases or service requests made through links on this page, at no additional cost to you. Recommendations are based on repair relevance, not commission rate.
Optional routine care
Maintenance supplies
These products support cleaning or routine upkeep. They are separate from the possible repair components above and are not claimed to fix this error code or symptom.
Air Conditioner Fin Cleaner
For routine cleaning of accessible coil fins when permitted by the manufacturer. Disconnect power and follow product and appliance instructions.
Model-Compatible Washable AC Filter
A reusable filter option only where the appliance supports one. Match the full model, dimensions, and filter specification.
Compatibility check required: use the complete appliance model and compare the existing filter, bag, or specification before ordering.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.
Technical Specifications
| note | The previous model-independent part specification was removed. Verify the full model number and diagnosis in the manufacturer's official parts catalog before ordering. |
|---|---|
| part_number | None |
Common Questions
What does P1 error mean on daikin air conditioner?
P1 error indicates a drainage issue due to a power supply voltage imbalance or open phase, causing the unit to stop functioning.
Can I fix daikin air conditioner P1 error myself?
Yes, check the power supply and ensure the unit is off before inspecting for blown fuses or tripped breakers.
How much does it cost to fix P1 error?
Repair costs range from ¥10,000 to ¥80,000+, depending on the parts replaced and service fees.
When should I call a technician for P1?
Call a technician if the error persists after checking power supply or if there are signs of electrical damage.
Sources & References
- What is a P1 fault? – Daikin NZ (community)
Data last verified: 2026-07-31
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