Troubleshooting With Error Code (For Wireless Lan Adapter); E: 18. External Communication Error Between Indoor Unit And Wlan Adapter - Fujitsu ASUG09LZAS Service Manual

4. Troubleshooting with error code (For wireless LAN adapter)

4-1. E: 18. External communication error between indoor unit
and WLAN adapter
Indoor unit
Indicator
Wireless LAN
adapter
Wireless LAN adapter PCB
Detective actuator
Controller PCB
Forecast of cause
Check point 1. Check the connection
• Check any loose or removed connection of between the wireless LAN adapter PCB and con-
troller PCB.
-> If there is abnormal condition, correct it.
• Check the connection condition on the controller PCB.
-> If there is loose connector, open cable or mis-wiring, correct it.
Check point 2. Replace wireless LAN adapter.
If check point 1 do not improve the symptom, replace the wireless LAN adapter and cancel the reg-
istration of air conditioner on the mobile app.
After replacing the adapter, perform the pairing on the mobile app.
For the method of the mobile app, refer to
Check point 3. Replace controller PCB
If check point 1 to 2 do not improve the symptom, replace the controller PCB.

4-1. E: 18. External communication error between indoor unit and WLAN adapter

Operation indicator
Timer indicator
Economy indicator
Error code
LED1 (green)
LED2 (orange)
↓
"Mobile app setting method"
↓
↓
End
Continuous flash
After receiving a signal from the wireless LAN adapter,
the same signal has not been received for 15 seconds.
Controller
PCB
Connection between indoor unit and wireless LAN
Wireless LAN adapter PCB failure
Controller PCB failure
- (03-51) -
4. Troubleshooting with error code (For wireless LAN adapter)
1 time flash
8 time flash
E: 18
Flashing fast
On
NG
adapter failure
on page 03-59.