How To Fix a P6 Mini Split Error Code (Cooper and Hunter)

By | March 12, 2022

How To Fix a P6 Mini Split Error Code
A P6 code on a Cooper and Hunter mini split is an Inverter Module (IPM) Protection Error.

When the voltage signal Inverter Module (IPM) Protection sends the compressor drive chip is abnormal, the display LED will show P6.

The AC will turn off.

Possible Causes of P6 Mini Split Error Code

  • Wiring Problem
  • Faulty IPM Board
  • Faulty Outdoor Fan Assembly
  • Compressor Malfunction
  • Low Refrigerant
  • Faulty Outdoor PCB Board

A P6 may be caused by a wiring mistake, faulty IPM board, faulty outdoor fan, assembly compressor malfunction, and faulty outdoor PCB.

How To Fix or Clear a P6 Mini Split Error Code

  1. Power off the unit and turn off the breaker or disconnect.
  2. Wait 2-3 minutes and power the unit back on.

Troubleshooting a P6 Mini Split Error Code

  • Check the power supply voltages
  • Check voltage at outside terminals
  • Check wiring
  • Check outside fan and ventilation
  • Check the IPM Board
  • Check outdoor Main PCB
  • Check refrigerant level
  • Check Compressor

If you have a Cooper and Hunter mini split with a P6 error code, there can be several causes.

Check all the voltages going to the unit, both outside and inside.

Also, check the communication line going between the inside and outside units.

Check the refrigerant level is correct and there are no leaks.

Video walk-through of troubleshooting.

5 thoughts on “How To Fix a P6 Mini Split Error Code (Cooper and Hunter)

  1. robert princiotta

    bosch minisplit for a few daus the inoor unit will show its set for 79 deg. then show p6 and go back to 79 deg. now p6 all the time no heat

  2. Richard A Schementi

    Have a p6 problem i shut the breaker off and put it on no change my parents misplaced the booklet on it what can i do?

  3. Michael Ganovski

    my P6 problem is not an A/C problem, but heat. Heat comes on but does not hold, it is intermittent.

    it seems to work fine for the day, then at night,it does not run. Is it or could it be on a timer, from the remote, by any chance?

  4. Babinyu

    Can this type of problem showing P6 error cause excessive use of electricity?


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