Mitsubishi Electric CMB-PW202V-J Service Handbook page 94

[ VIII Troubleshooting ]
1. Error Code
7107
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
Error source
WCB (1)
(2)
(3)
HWE09070
Cause
Model total of indoor units per each port or per
each port merge is greater than the specification.
Port
Indoor unit/PWFY port
PWFY port
The port number for indoor unit has not been set
according to the table below.
Port
Indoor unit/PWFY port
PWFY port
The port number for indoor unit has been set to "1,"
which is the port number for PWFY.
Is the model total of indoor
units connected to the same port
greater than the item (1)?
Change the port No.
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 WCB and the indoor
Model total
unit.
525
350
Port number
0
1
YES
NO
YES
Port No. setting error?
NO
YES
The wrong model
(capacity code) is set.
NO
Adjust the piping
connection to the port.
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Check method and remedy
Change the port No.
Change the set
indoor unit model
(capacity code).
GB