Mitsubishi Electric PUMY-P36NKMU3 Technical & Service Manual page 92

Check code
6831, 6834
(E0/E4)
●Diagnosis of defects
Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards
Continued from the previous page.
Refer to the chapter
"Electrical Work".
Is the wiring connected
properly, meeting the condition?
Yes
OCH733
MA communication receive error
Diagnosis
No
Connect the wiring properly as specified in
the chapter "Electrical Work" in the indoor
unit Installation Manual.
No abnormality
It might be caused by an external noise, so
check the transmission line to remove the
factor(s).
92
Chart 2 of 2
Remedy