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