Daikin Mini-Split Code P1
Soft lockout
High voltage of capacitor in main inverter circuit. The main circuit capacitor's voltage waveform looks like an open-phase power supply.
Manual wording: “P1 High voltage of capacitor in main inverter circuit”
Documented for: RMXS multi-split outdoor units
Likely causes, most common first
- Defective main circuit capacitor
- Improper main circuit wiring
- Defective main PCB (A1P)
What you can safely check yourself
- Check both legs of the outdoor unit breaker are on and there has not been a partial power outage
When to call a technician
The main inverter capacitor stores dangerous voltage even after power is off. Only a technician should open the outdoor electrical box.
A Daikin mini-split throwing this code repeatedly has a reason — clearing the code without fixing the cause just hides it.
Source
- Service Manual - Multi-Split Type Air Conditioners RMXS-L Series (SiUS181631EA) (Daikin, RMXS48LVJU outdoor, BPMKS048A2U/049A3U branch provider, CTXG/CTXS/FTXS/CDXS/FDXS/FVXS/FFQ indoor units) · checked 2026-08-25