Mitsubishi Electric CMB-PW202V-J, Service Handbook, Page: 94 / 114

[
VIII
Troubleshooting ]
- 85 -
HWE09070 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
WCB (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 WCB and the indoor
unit.
(2) The port number for indoor unit has not been set
according to the table below.
(3) The port number for indoor unit has been set to "1,"
which is the port number for PWFY.
Model total Port
525
350
Indoor unit/PWFY port
PWFY port
Port number Port
Indoor unit/PWFY port 0
PWFY port 1
Change the port No.
Is the model total of indoor
units connected to the same port
greater than the item (1)?
YES
NO
NO
NO
YES
Change the port No.
YES
Change the set
indoor unit model
(capacity code).
Port No. setting error?
The wrong model
(capacity code) is set.
Adjust the piping
connection to the port.