TradeAssistIQHome

Midea M-Thermal Arctic HT R290 Mono fault L6E

Inverter module protection code

Heat pump

What it means

Inverter module protection code shown on digital display; specific description not detailed in this section beyond code table image.

Likely causes

  1. Compressor wiring fault
  2. Power supply phase loss
  3. Faulty inverter power module
  4. Faulty three-phase bridge rectifier (3Ph models)

Where to start

  1. Check specific L** code on digital display panel on the Main Control PCB
  2. Refer to Part 4 Appendix: Guide for identifying inverter PCB failure to determine PCB status before component replacement
  3. Set multimeter to diode test function (secondary tube available)

The full answer, free

  • 6 more checks in order
  • The readings and component tests from the manual
  • How to put it right, step by step
  • The manual page for this fault (page 147), right under the answer
Ask about L6E freeCreate a free account

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 Midea manual for the M-Thermal Arctic HT R290 Mono. Check the model on the data plate before you order parts.

Other Midea M-Thermal Arctic HT R290 Mono fault codes