intensity VRF V5 Series Service Manual page 76

V5 X VRF 460V 60Hz
4.11 H7 Troubleshooting
Digital display output
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.
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.
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