Mitsubishi Electric MSZ-EF18VGW-E1 Service Manual page 34

2. Check of Wi-Fi interface (MSZ-EF·VGKW/B/S)
Follow the procedure below if the air conditioner cannot be monitored or controlled with a device such as a smartphone.
Start
Is UNIT LED on the Wi-Fi interface blinking?
Yes
Can the device such as a smartphone be connected
to the Internet through the router?
Yes
Has pairing of the Wi-Fi interface and the router
been successfully completed?
Yes
Is NET LED on the Wi-Fi interface blinking?
Yes
Is ERR LED on the Wi-Fi interface blinking?
Yes
Communication between the Wi-Fi interface and
the router (or MELCloud) has been failed. Please
hold down the RESET switch of Wi-Fi interface for 2
seconds. If ERR LED blinks after waiting for a few
minutes, please check the internet environment and
confirm again after a while.
The following characters cannot be used with SSID,
so please change if you are using. [ " , ' , < , > , & ]
Refer to the SETUP MANUAL at the following URL.
http://www.mitsubishielectric.com/ldg/ibim/
OBH831D
There is a problem in communication between the air conditioner and
the Wi-Fi interface. Check whether the air conditioner can be oper-
No
ated with a remote controller.
If the air conditioner does not operate, Check indoor/outdoor connect-
ing wire and the power supply. (Check the indoor power P.C. board
and the indoor electronic control P.C. board)
If the indoor/outdoor wire is connected and the power supplied,
hold down the RESET switch of Wi-Fi interface for 2 seconds. The
communication with the air conditioner is normal if UNIT LED starts
blinking. (It may take a few minutes to blinking.)
If the problem persists, check the cable and the connector of Wi-Fi
interface.
If all else failed, replace the Wi-Fi interface.
If not improve it even if replace the Wi-Fi interface, replace the indoor
electronic control P.C. board.
Check the instruction manuals for the router and the device such as a
smartphone, and enable the Internet access.
No
Connect the Wi-Fi interface and the router by referring to
SETUP QUICK REFERENCE GUIDE and SETUP MANUAL. If
the connection failed, check the following and connect the Wi-Fi
interface and the router again:
- Make sure that communication distance is not too far between
No the Wi-Fi interface and the router. Move the router closer to the
Wi-Fi interface.
- Make sure that the router uses WPA2-AES encryption.
- Make sure that the number of the connected devices to the
router does not exceed the limit.
If NET LED is not blinking, the Wi-Fi interface and the router are
not communicating properly. Move the router and check wheth-
No
er the communication has been improved.
The following characters cannot be used with SSID, so please
change if you are using. [ " , ' , < , > , & ]
If the problem persists, please hold down the RESET switch
of Wi-Fi interface for 2 seconds. And please go through this
No
procedure again from the beginning after a while.
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