Fujitsu AOUH18LMAS1, Service Manual

Page: 115 / 215

4-5. E: 18.X. Wireless LAN adapter non-energized
Indicator
Indoor unit
Operation indicator 1 time flash
Timer indicator 8 time flash
Economy indicator Continuous flash
Error code E: 18
→ireless LAN
adapter
LED1 (green) Off
LED2 (orange) Off
Detective actuator Indoor unit controller PCB
→hen the voltage (DC 12 V) does not output from the
controller PCB.
→ireless LAN adapter PCB
Forecast of cause
Indoor unit controller PCB failure
→ireless LAN adapter PCB failure
→iring connection 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. Check the wireless LAN adapter PCB and the controller PCB
Check voltage at CN6 (terminal 1—2) of main PCB.
(Power supply to remote controller)
• If it is DC 0 V, controller PCB is failure.
-> Replace controller PCB.
• If it is DC 12 V, wireless LAN adapter PCB is failure.
-> Replace the wireless LAN adapter and cancel the registration of air condi-
tioner 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 03-75.
End
4-5. E: 18.↓. →ireless LAN adapter non-energized
- (03-73) -
4. Troubleshooting with error code (For wireless LAN adapter)
TR
O
U
B
LESH
O
O
TI
N
G
TR
O
U
B
LESH
O
O
TI
N
G