45
9.2.5 E6 malfunction
Troubleshooting
Inspection
Check if connection wire between indoor and outdoor units and wire inside the unit are connected well.
Check if mainboard of indoor or outdoor unit is damaged
Flowchart
Communication malfunction of
some indoor units
Does the
broken-down indoor
unit resume normal?
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
Connect wires
according to the
wiring diagram
De-energize the unit. Change the communication cable
of indoor units. Energize the unit and wait for 3 min
Yes
No
Replace mainboard
of outdoor unit
Replace the broken-down
mainboard of the indoor unit
No
Yes
End
Is malfunction
removed
Yes
No
