Midea MCA3U-09HRFN1-M(C)

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17.4.18. P6/J5 Malfunction
Malfunction conditions
Outdoor pressure switch cut off the system because high pressure is higher than
4.4 MPa.
Possible causes
● Wiring mistakes
● Faulty pressure protector
● Faulty outdoor fan
● System blockages
● Faulty outdoor PCB