Mitsubishi Electric PURY-P120Y(T)HMU-A, Service Handbook

Page: 261 / 387

[
IX
Troubleshooting ]
- 252 - HWE0803A GB
1. Error Code
Port setting error
2. Error definition and error detection method
The port with wrong number is connected to the indoor unit.The model total connected to the port is greater than the specifi-
cation.
3. Cause, check method and remedy
7107
Error source Cause Check method and remedy
BC controller (1) Model total of indoor units per each port or per
each port merge is greater than the specification. Before resetting the port number using
the port number setting switch or the
model using the model (capacity code)
setting switch, turn off the power of the
outdoor unit, the BC controller and the
indoor unit.
(2) 4 or more indoor units are connected to the same
port.
(3) When two ports are used, the port with the smaller
number is not connected to the indoor unit.
(4) For the address of the BC controller (Sub 1 or 2),
50 is not added to the smallest indoor unit address,
which is connected to the BC controller (Sub1 or
2).
(5) In the system to which multiple BC controllers are
connected, the indoor unit address connected to
the BC controller is not set as shown below.
(i) The indoor unit address which is connected to
the BC controller (main)
(ii) The indoor unit address which is connected to
the BC controller (Sub1)
(iii) he indoor unit address which is connected to
the BC controller (Sub2)
Address setting
(i)<(ii)<(iii)
*(ii) and (iii) can be reversed.
Model total Total port number
Single branching
2 branches merge
54
69
Change the port No.
Is there a BC
controller (Sub)?
Are 4 or more indoor units
connected to the same port?
Is the model total of indoor
units connected to the same port
greater than the item (1)?
When two ports are used,
is the port with the smallest number
connected to the indoor unit?
YES
YES
NO
YES
YES
NO
For the address of the BC
controller (Sub), is 50 added to
the smallest indoor unit address,
which is connected to the
BC controller (Sub)?
Is the address of the indoor
unit, which is connected to the the
BC controller (Main) ,smaller than
that of the indoor, which is
connected to the BC controller
(Sub 1 or 2)?
YES
YES
Is the address of the indoor
unit, which is connected to the the
BC controller (Main), smaller than
that of the indoor, which is
connected to the BC controller
(Sub 1 or 2)?
YES
NO
NO
NO
NO
NO
Change the port No.
NO
Change the BC
controller
(Sub) address.
NO
NO
Change the indoor
unit address or
change the BC
controller address
YES
Change the port No.
YES
Change the set
indoor unit model
(capacity code).
Port No. setting error?
Port No. setting error?
The wrong model
(capacity code) is set.
Adjust the piping
connection to the port.
Adjust the piping
connection to the port.