V6 VRF 50Hz
109
Part 6 - Diagnosis and Troubleshooting
2.16 H7: Unmatched total number of indoor units
Digital display output 2.16.1
Description 2.16.2
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.
Trigger / recover condition 2.16.3
Trigger condition: Only one indoor unit cannot be detected by master unit for 8 hours or more than one indoor unit
cannot be detected by master unit for 3 minutes.
Recover condition: Number of indoor units detected by master unit is same as number set on main PCB.
Reset method: Resume automatically.
Possible causes 2.16.4
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.