Fujitsu ASYG07KMTA Service Manual page 68

Trouble shooting 4
INDOOR UNIT Error Method:
External communication error
Detective Actuators:
External communication error
Forecast of Cause :
1. Connection failure
Check Point 1 : Check the connection
Check any loose or removed connection of between the Main PCB to the Wi-fi adapter
>>If there is an abnormal condition, correct it by refer to installation manual or
the technical manual.
Check the condition condtion on the Wi-fi adapter and the Main PCB
(If there is loose connector, open cable or miss-wiring)
OK OK
Check Point 2: Replace Wi-fi adapter
If Check Point 1 do not improve the symptom, change Wi-fi adapter.
OK OK
Check Point 3: Replace Main PCB
If Check Point 2 do not improve the symptom, change Main PCB.
Indicate or Display:
Outdoor Unit : No indication
Indoor Unit
ERROR CODE : [E : 18 ]
Detective details:
After receiving a signal from the Wi-fi adapter,
the same a signal has not been received for 15sec
2.Wi-fi adapter failure
02-07
: Operation lamp: 1 time Flash, Timer lamp: 8 time Flash
Economy lamp: Continuous flash.
3.Main PCB failure