Trianco High Temperature Air Source Heat Pump R290 fault F26
IGBT power device overheat fault
Heat pumpWhat it means
IGBT (power module) overheat protection has activated, indicating excessive temperature at the power device likely due to inadequate cooling or airflow.
Likely causes
- Fans not running
- Insufficient installation distance/space causing poor heat transfer
- Blocked or dirty heat exchanger fins
- Faulty driver board
Where to start
- Check if the fans are running or not
- Check the installation distance and space
- Verify enough clearance for good heating transfer condition
The full answer, free
- 1 more check in order
- How to put it right, step by step
- The manual page for this fault (page 37), right under the answer
Safety: Isolate the outdoor unit and any backup heater, and give the inverter capacitors time to discharge before you open the electrics. Anything on the refrigerant circuit needs F-gas certification.
From the Trianco manual for the High Temperature Air Source Heat Pump R290. Check the model on the data plate before you order parts.
Other Trianco High Temperature Air Source Heat Pump R290 fault codes
- E03Water flow switch protection
- E08Communication fault
- E103Fan motor overload protection
- E29Secondary antifreezing protection (water inlet≤A04-2°C)
- F03PFC fault
- F05DC bus over voltage
- F06DC bus under voltage
- F07AC input under voltage
- F09Input voltage sampling fault
- F13IPM overheat stop
- F15Input voltage lacking phase
- F16Compressor weak magnetic protection alarm
- F20IGBT power device overheat alarm
- P01Water inlet temp. sensor fault
- P02Water outlet temp. sensor fault
- P032Hot water tank temp. sensor fault
- P04Ambient temp. sensor fault
- P101EVI inlet temp. sensor fault
- P102EVI outlet temp. sensor fault
- P153Coil temp. sensor fault
- P17Water outlet temp. sensor fault
- P181Exhaust temp. sensor fault
- P182Exhaust over temp
- P191Antifreeze temp. sensor fault