HVACopediaKinghome · Heat pump
P8 Power module over-temperature
What the control is telling you
The power module temperature exceeded its limit.
Applies to: Kinghome KM09HT1DI, KM12HT1DI, KM18HT1DI, KM24HT1DI wall mini-splits; Kinghome KM09HF1DI to KM24HF1DI wall mini-splits (Gree GFH..DA/DB); Kinghome Ultranixx cold-climate KU36UHO and KU60UHO outdoor units with KU..UH2I and KD..UHI air handlers
Likely causes
- Thermal grease missing or uneven
- Module screws loose
- Faulty temperature sampling
Test and repair steps
- De-energize and wait 20 min.
- Check thermal grease and the heat-sink fit.
- Retighten module screws.
- Replace the board if needed.
Models that show this code
15 models in Kinghome KM HT1DI, Kinghome KM HF1DI, Kinghome Ultranixx
Other codes on the same units
- P3 Compressor intermediate-frequency test display
- P5 Compressor phase overcurrent
- P6 Main-to-driver communication error
- P7 Module temperature sensor circuit fault
- U1 Compressor phase current detection circuit fault
- U3 DC bus voltage drop fault
- U5 Whole-unit current detection fault
- U7 Four-way valve abnormal
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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 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.