Midea MV5-X252W/V2GN1 Service Manual page 77

V5 X VRF 50/60Hz
4.12 H7 Troubleshooting
4.12.1 Digital display output
4.12.2 Description
 Number of indoor units detected by master unit not same as number set on main PCB.
 All units stop running.
 Error code is only displayed on the master unit.
4.12.3 Possible causes
 Number of indoor units set on main PCB not same as actual number of indoor units.
 Some indoor units are powered off.
 Communication wires between indoor and outdoor units not connected properly.
 Indoor unit PCB damaged.
 Indoor unit without address or indoor unit address duplicated.
 Main PCB damaged.
76 201608