Mitsubishi Electric PUMY-P250YBM Technical & Service Manual page 86

Check code
6832 6833
,
(E3/E5)
●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
OCH760
MA communication send 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).
86
Chart 2 of 2
Remedy