Midea MDV-335(12)W/D2RN1T(C)

V4+R VRF 50/60Hz
201608 69
Part 5 - Diagnosis and Troubleshooting
4.11 H7 Troubleshooting
Digital display output 4.11.1
Description 4.11.2
 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.
Possible causes 4.11.3
 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.