H7: Qty. Of Indoor Units Mismatching - Midea VRF Series Service Manual

2.15 H7: Qty. of indoor units mismatching

Digital display output
Description
 Number of indoor units detected by master unit not same as number set on outdoor main PCB.
 All units stop running.
 Error code is only displayed on the master unit.
Trigger / recover condition
 Trigger condition: One or more indoor units cannot be detected by master unit for 20 minutes.
 Recover condition: Number of indoor units detected by master unit is same as number set on outdoor main PCB for
1minute.
 Reset method: Resume automatically.
Possible causes
 Number of indoor units set on outdoor 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.
 Outdoor main PCB damaged.
V6R VRF 50/60Hz
117