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Joined: Apr 2010
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julio Offline OP
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I got FISHER&PAYKEL MR850JHU problem,that error code showed E28 and E12.Who can tell me which board is bad?

Joined: Aug 2007
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E28-mains voltage measurement is uncalibrated; E12- temp. circuit calibration out of range. Check your service manual and go to service menu and try to calibrate first the humidifier and check your power PCB B/D, maybe just need recalibrations.

Joined: Apr 2010
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julio Offline OP
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Micro-controller failure could be it?How to do the calibration?

Joined: Aug 2007
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You must have a service manual and follow the instructions for voltage calibration check.


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