HVACopediaKinghome · Heat pump
P5 Compressor phase overcurrent
What the control is telling you
Compressor phase current went above its limit and the unit stops.
Applies to: Kinghome KM09HT1DI, KM12HT1DI, KM18HT1DI, KM24HT1DI wall mini-splits; Kinghome KM09HF1DI to KM24HF1DI wall mini-splits (Gree GFH..DA/DB); Kinghome Ultranixx Eco KD24UHO to KD60UHO outdoor units with KD..UHI air handlers; Kinghome Ultranixx cold-climate KU36UHO and KU60UHO outdoor units with KU..UH2I and KD..UHI air handlers
Likely causes
- Heavy system load
- Compressor wires missing a phase, reversed or loose
- Faulty current-sample circuit
- Failed compressor
Test and repair steps
- Warning: Switch off power at the breaker and wait for the DC bus capacitors to discharge before touching the outdoor control board or compressor wiring.
- Check compressor wire connections and phase order.
- Check for overload (airflow, charge).
- Replace the drive board then the compressor if confirmed faulty.
Models that show this code
27 models in Kinghome KM HT1DI, Kinghome KM HF1DI, Kinghome Ultranixx Eco, Kinghome Ultranixx
Other codes on the same units
- P0 Compressor minimum-frequency test / driver reset
- P1 Compressor rated-frequency test display
- P2 Compressor maximum-frequency test display
- P3 Compressor intermediate-frequency test display
- P6 Main-to-driver communication error
- P7 Module temperature sensor circuit fault
- P8 Power module over-temperature
- U1 Compressor phase current detection circuit fault
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Source: Kinghome KM09-12-18-24HT1DI service manual, sec. 9.1 error code list; Kinghome KM09-24HF1DI service manual, sec. 11.1 error code list; Kinghome Ultranixx Eco KD24-60UHO service manual, sec. 3.3-3.4; Kinghome Ultranixx cold-climate KU36/60UHO service manual GC202306, sec. 3.3-3.4. Summarized in our own words; check the original manual for your model.
Homeowner looking at this code? See what it means for you and when to call a technician.
For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.