Daikin Aircon PA Error Code
Capture the Daikin PA fault correctly, then see what should be checked before parts are quoted. Match the model first; same-looking codes can point to different rows.
What does Daikin PA mean?
Daikin PA is listed as broken wire of heater in humidifier unit and refrigerant cylinder is empty during automatic charging in Inverter Split, Multi-Split, Single-Split rows such as General RA self-diagnosis guide, SkyAir. This meaning comes from the manufacturer's own diagnostic material. Do not collapse this code across model families; use the model, series, or system type to choose the right row. Confirm the exact model, series, or signal row before accepting a parts quote.
Choose the listing that matches your unit
The same code has more than one listed meaning. Match the model family, the system type and the unit that shows the code before approving parts.
| Code | What it means | What to check first |
|---|---|---|
| General RA self-diagnosis guide | Broken wire of heater in humidifier unit | Match this meaning to your installed model and the unit that shows the code, then use the checks below. |
| SkyAir | Refrigerant cylinder is empty during automatic charging | Match this meaning to your installed model and the unit that shows the code, then use the checks below. |
- Code
- General RA self-diagnosis guide
- What it means
- Broken wire of heater in humidifier unit
- What to check first
- Match this meaning to your installed model and the unit that shows the code, then use the checks below.
- Code
- SkyAir
- What it means
- Refrigerant cylinder is empty during automatic charging
- What to check first
- Match this meaning to your installed model and the unit that shows the code, then use the checks below.
What to do now
Use these steps before customer action, gas work, a pressure check, or parts quote.
Stop using the unit if PA returns
Stop using the unit if PA returns with weak cooling, frost, hissing, or outdoor-unit tripping.
No manufacturer reset steps listed for PA
Capture the complete PA display and model stickers first. The manufacturer lists no customer reset procedure; do not treat a generic power-cycle as manufacturer guidance.
Send these to us
PA error code, a clear display photo, Daikin model stickers, affected rooms, operating state when the code appeared, and cooling-loss timeline and any recent gas top-up
Guidance for your model
Notes that match the code to your exact model. Electrical, refrigerant, wiring, resistance and component checks are for a technician.
| Detail | What it says |
|---|---|
| Diagnostic note | Stop the system if it smells burnt, leaks, or trips power; note the exact model and code before booking diagnosis. |
| Singapore / model note | Official Daikin SM-TS3 row; use only on models with humidifier heater hardware. |
| Singapore / model note | Official Daikin SM-TS3 self-diagnosis row. Manual causes: Master-unit refrigerant cylinder is empty. |
- Detail
- Diagnostic note
- What it says
- Stop the system if it smells burnt, leaks, or trips power; note the exact model and code before booking diagnosis.
- Detail
- Singapore / model note
- What it says
- Official Daikin SM-TS3 row; use only on models with humidifier heater hardware.
- Detail
- Singapore / model note
- What it says
- Official Daikin SM-TS3 self-diagnosis row. Manual causes: Master-unit refrigerant cylinder is empty.
What to check before repair
Use this split to separate safe evidence capture from the tests a technician should prove before quoting parts.
| You can check | Technician should confirm |
|---|---|
| Before taking any system action on PA, take a clear display photo. | Match PA to low-pressure, high-pressure, leak, or refrigerant-cycle protection. |
| Capture the Daikin indoor and outdoor model stickers so the correct family row is used. | Measure operating pressures, coil temperatures, airflow, and outdoor fan condition. |
| The manufacturer lists no customer reset procedure for this code. Note whether one room, several rooms, or the whole system is affected. | Leak-check or pressure-test before recommending another refrigerant top-up. |
- You can check
- Before taking any system action on PA, take a clear display photo.
- Technician should confirm
- Match PA to low-pressure, high-pressure, leak, or refrigerant-cycle protection.
- You can check
- Capture the Daikin indoor and outdoor model stickers so the correct family row is used.
- Technician should confirm
- Measure operating pressures, coil temperatures, airflow, and outdoor fan condition.
- You can check
- The manufacturer lists no customer reset procedure for this code. Note whether one room, several rooms, or the whole system is affected.
- Technician should confirm
- Leak-check or pressure-test before recommending another refrigerant top-up.
Pressure, leak, or airflow decision
Daikin PA needs measured pressure, airflow, and leak evidence before gas work is approved. Replacement only becomes serious when the leak, compressor, or coil repair is uneconomical.
A top-up alone is poor value if the leak source is not found.
High-pressure faults often come from airflow, condenser, fan, or overcharge conditions.
Coil leaks or compressor-related findings can shift older systems toward replacement.
Daikin PA questions
What does the Daikin PA error mean?
Can I fix a Daikin PA error myself?
Is it safe to keep running the aircon with a PA error?
What causes a Daikin PA error?
Will a Daikin PA error need a repair or a full replacement?
What should I send a technician about a Daikin PA error?
Confirm the fault
Share the error code, model number and symptoms so we can assess the likely cause.
Not the right code?
Browse the full Daikin list or check a few codes in the same fault category.
Describe your situation
Tell us what’s going on. Symptoms, setup, photos, anything we should know. We’ll assess and come back with the right next step.
Read next
Use these if the quote mentions the parts, checks, or repair path this code points to.