Mitsubishi Electric CMB-WM108V-AA Service Handbook page 175

[ VIII Troubleshooting ]
7107
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. Error source, cause, check method and remedy
After troubleshooting the error using the check methods and remedies shown below, turn the power back on.
Error source
HBC controller (1)
(2)
(3)
(4)
(5)
(6)
HWE1708A
Cause
Model total of indoor units per each port or per
each port merge is greater than the specification.
Single branching
Total port
number
Two branches merge
4 or more indoor units are connected to the same
port.
When two ports are used, the port with the smaller
number is not connected to the indoor unit.
The address of the HBC controller is not set to an
address that equals the address of the lowest ad-
dress of the connected indoor unit plus 50.
In the system to which multiple HBC controllers
are connected, the indoor unit address connected
to the HBC controller is not set as shown below.
(i) The indoor unit address which is connected to
the HBC controller (main 1)
(ii) The indoor unit address which is connected to
the HBC controller (Sub 1)
(iii) The indoor unit address which is connected to
the HBC controller (main 2)
(iv) The indoor unit address which is connected to
the HBC controller (Sub 2)
Address setting
(i) < (ii) < (iii) < (iv)
Indoor units (W/WP/WL81 or above) using two
branch ports are connected to two branch ports
across the groups listed below.
Group 1: Branch port No. 1 to No. 4
Group 2: Branch port No. 5 to No. 8
Group 3: Branch port No. 9 to No. 12(*)
Group 4: Branch port No. 13 to No. 16(*)
* For HBC with 16 branch ports
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
80
outdoor unit, the HBC controller and
the indoor unit.
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Check method and remedy
GB