E: 18. Communication Error - Fujitsu ASYG07-14KGTF Service Manual

4-3. E: 18. Communication error

Indoor unit
Indicator
Mobile app
Wireless LAN router
Wireless LAN adapter PCB
Detective actuator
Indoor unit 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.
4-3. E: 18. Communication error
Operation indicator
Timer indicator
Economy indicator
Wireless LAN
indicator
Error code
When the external communication error between indoor
unit and wireless LAN adapter and network
communication error between wireless LAN router and
wireless LAN adapter has occurred simultaneously.
Connection between indoor unit and wireless LAN
Connection between wireless LAN adapter and wireless
↓
"Mobile app setting method"
↓
↓
- (03-84) -
1 time flash
8 time flash
Continuous flash
Flashing slowly
E: 18
E: 18.1
NG NG
Controller
PCB
Connection cable failure of wireless LAN router
Wireless LAN router failure
adapter failure
LAN router failure
Wireless LAN adapter PCB failure
Controller PCB failure
on page 03-87.
4. Troubleshooting with error code (For wireless LAN adapter)
NG