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Mitsubishi Electric PURY-P200 Service Handbook page 150

City multi r410a
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Checking
Meaning, detecting method
code
7107
Branch port setting error
Branch port No. setting of the indoor
unit is wrong.
Total type number per each branch
port is greater than the specification.
Is there a BC
controller (Sub)?
NO
Is single
Is single
branching setting made on
branching setting made on
4 or more indoor units?
4 or more indoor units?
4 or more indoor units?
NO
Is the total type
number of the indoor unit,
on which single branching
setting is made, greater
than the item 1)?
When multiple
branches merge, is the
smallest number set on
the branch port?
Change the branch
port No.
Cause
(1) Total type number of the in-
door unit per each branch
port or per each merge port
is greater than the specifica-
tion.
Total port number
Single branching
2 branches merge
(2) Single branching setting is
made on 4 or more indoor
units.
(3) When multiple branches
merge, the smallest number
is not set on the branch port.
(4) For the address of the BC
controller (Sub 1 or 2), 50 is
not added to the smallest ad-
dress of the indoor unit,
which is connected to the
BC controller (Sub1 or 2).
(5) Under the multiple BC con-
trollers connection system,
the address of the indoor
unit, which is connected to
the BC controller, is not set
as shown below.
1 The address of the indoor
unit which is connected to
the BC controller (main)
2 The address of the indoor
unit which is connected to
the BC controller (Sub1)
3 The address of the indoor
unit which is connected to
the BC controller (Sub2)
Address setting
1 < 2 < 3
✻2 and 3 can be reversed.
YES
YES
YES
Branch port No.
setting error?
NO
Adjust the piping
connection to the
branch port.
YES
YES
Branch port No.
setting error?
NO
The type
The type
YES
indoor unit type
(capacity code)
(capacity code)
(capacity code)
setting switch is set
setting switch is set
wrong.
wrong.
NO
Adjust the piping
connection to the
branch port.
- 147 -
Checking method & Countermeasure
Before resetting the branch port set-
ting switch or the type (capacity code)
setting switch, turn off the power of
the outdoor unit, the BC controller and
the indoor unit.
Total type number
140
250
For the address
For the address
of the BC controller (Sub),
of the BC controller (Sub),
is 50 added to the smallest
is 50 added to the smallest
is 50 added to the smallest
address of the indoor unit,
address of the indoor unit,
which is connected to the
which is connected to the
BC controller (Sub)?
BC controller (Sub)?
YES
Change
the branch
port No.
Is the address
Is the address
of the indoor unit, which
of the indoor unit, which
is connected to the BC
is connected to the BC
controller (Main), smaller
controller (Main), smaller
controller (Main), smaller
than that of the indoor unit,
than that of the indoor unit,
which is connected to the
which is connected to the
BC controller
BC controller
(Sub 1 or 2)?
(Sub 1 or 2)?
Change
the branch
port No.
Is the address
Is the address
Is the address
of the indoor unit, which
of the indoor unit, which
of the indoor unit, which
Change the
is connected to the BC
is connected to the BC
is connected to the BC
controller (Sub1), smaller
controller (Sub), smaller
controller (Sub), smaller
controller (Sub), smaller
controller (Sub), smaller
than that of the indoor unit,
than that of the indoor unit,
than that of the indoor unit,
setting.
which is connected to the
which is connected to the
which is connected to the
BC controller
BC controller
BC controller
(Sub2)?
(Sub2)?
(Sub2)?
NO
Change the BC
controller (Sub)
address.
Change the
indoor unit
NO
address or
change the BC
controller
address
NO
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