Mitsubishi Electric PURY-M200YNW-A1 Service Handbook page 258

[7-9 Error Code Definitions and Solutions: Codes [7000 - 7999] ]
Error source
HBC
BS_07_M
Cause
YES
Is th b)?
NO
YES
Are 4 or more indoor units
Port No. setting error?
connected to the same port?
NO
Adjust the piping
Is the model total of indoor
YES
connection to the port.
units connected to the same port
greater than the item (1)?
NO
When two ports are used,
is the port with the smallest number
Port No. setting error?
connected to the indoor unit?
NO
The wrong model
(capacity code) is set.
Adjust the piping
Change the port No.
connection to the port.
the smallest indoor unit address,
YES
Change the port No.
unit, which is connected to the the
NO
YES
(Sub 1)" < "Indoor unit address of
Change the port No.
NO
Change the set
YES
indoor unit model
(capacity code).
NO
(Sub 2)" < "Indoor unit address of
Check method and remedy
For the address of the
HBC (Sub), is 50 added to
NO
Change the HBC (Sub)
address.
which is connected to the
HBC (Sub)?
YES
Is the address of the indoor
Change the indoor
NO
unit address or
HBC (Main) ,smaller than
change the HBC
that of the indoor, which is
address
connected to the HBC (Sub 1)?
YES
Is the formula "Address of the
NO
indoor unit connected to HBC
the HBC (Sub 2)" true?
YES
Is the formula "Address of the
NO
indoor unit connected to HBC
the HBC (Sub 3)" true?
YES
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