Midea VRF Series User Manual

V6R VRF 50/60Hz
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Part
6
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Diagnosis and Troubleshooting
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.

Midea VRF Series Specifications

General

Compressor Type	Inverter Scroll Compressor
Type	Variable Refrigerant Flow (VRF)
Refrigerant	R410A
Control	Centralized control, individual control
Indoor Unit Types	Wall mounted, cassette, ducted, floor standing
Energy Efficiency	High energy efficiency with DC inverter technology
Indoor Unit Noise Level	19 dB(A) to 45 dB(A)