Mitsubishi Electric PUMY-P112VKM4 Technical & Service Manual page 107

Check code
7130
(EF)
Abnormal points and detection methods
When the connected indoor unit is not compatible with the outdoor unit,
the outdoor unit detects the error at startup.
●Diagnosis of defects
Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Refer to the service manual of the outdoor
unit or the connected indoor unit for the
authorized combination.
Is the indoor unit authorized to
connect with the outdoor unit?
Check whether the model
selection switch is set correctly.
Are they correct?
OCH673D
Incompatible unit combination error
Diagnosis
Yes
Yes
Causes and checkpoints
Connecting indoor unit(s) which is not authorized to
connect to the outdoor unit.
Replace the indoor unit(s) to the
No
connectable one.
Set the model selection switch correctly,
No
then restart.
Replace the outdoor multi controller circuit
board.
107
Remedy