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8.2.5 E6 Malfunction Inspection
1. Check if connection wire between indoor and outdoor units and wire inside the unit are connected well.
2. Check if mainboard of indoor or outdoor unit is damaged.
Communication malfunction of some indoor units
De-energize the unit and check if the connecting
wire of indoor and outdoor unit and wiring of
electric box are correct.
Is wire connected correctly?
Does the broken-down indoor unit resume normal?
Replace the broken-down mainboard of the indoor unit
End
Connect wires according
to the wiring diagram
Is malfunction removed？
De-energize the unit. Change the communication cable
of indoor units. Energize the unit and wait for 3 min
Replace mainboard of outdoor unit
No
No
No
Yes
Yes
Yes
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