Mitsubishi Electric PURY-P72 Service Handbook page 265

[ IX Troubleshooting ]
1. Error Code
7130
Incompatible unit combination
2. Error definition and error detection method
The check code will appear when the indoor units with different refrigerant systems are connected.
3. Error source, cause, check method and remedy
Error source
Outdoor unit The connected indoor unit or BC controller is
exclusively for use with R22 or R407C. An in-
compatible indoor unit or BC controller is con-
nected.
The M-NET connection adapter is connected
to the indoor unit system in a system in which
the Slim Model (A control) of units are con-
nected to the M-NET.
HWE0803A
Cause
- 256 -
Check method and remedy
Check the model names of the connected in-
door unit and the BC controller.
Check whether the connecting adapter for
M-NET is not connected to the indoor unit.
(Connect the connecting adapter for M-NET
to the outdoor unit.)
GB