Fujitsu AOUH18LMAS1, Service Manual

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4-4. E: 18.X. Communication error
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) Flashing fast
LED2 (orange) Flashing fast
Detective actuator
→ireless LAN router →hen the external communication error between indoor
unit and →LAN adapter and network communication
error between wireless LAN router and →LAN adapter
has occurred simultaneously.
NG
Controller
PCB
NG NG
→ireless LAN adapter PCB
Indoor unit controller PCB
Forecast of cause
Connection cable failure of wireless LAN router
→ireless LAN router failure
Connection between indoor unit and wireless LAN
adapter failure
Connection between wireless LAN adapter and wireless
LAN router failure
→ireless LAN adapter PCB failure
Controller PCB failure
Check point 1. Check the connection cable
Check the connection cable on the wireless LAN router.
-> If there is loose connector, open cable or mis-wiring, correct it.
Check point 2. Check the connection status.and transmission state
• Check the connection status to the internet and wireless LAN router.
-> If the wireless LAN router is not connected to the internet, check the transmission between
wireless LAN products (ex. PC or game console, etc.) other than air conditioner and wireless
LAN router.
If no, go to
"Check point 4" .
• Check the wireless transmission state of wireless LAN router (LED status).
-> If the wireless transmission from the wireless LAN router has not been outgoing, inquire to
wireless LAN router maker.
If the display pattern is changed as follows, go to "Check point 3-2" .
– LED 1 (green): flashing fast
– LED 2 (orange): on
If no, go to "Check point 3-1" .
4-4. E: 18.↓. Communication error
- (03-71) -
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