Mitsubishi Electric MSZ-LN18VGW-E1 Service Manual page 27

2. Check of Wi-Fi interface
Follow the procedure below if the air conditioner cannot be monitored or controlled with a device such as a
smartphone.
Start
Is the UNIT lamp 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 the NET lamp on the Wi-Fi interface blinking?
Yes
Is the ERR lamp on the Wi-Fi interface blinking?
Yes
If the problem persists, go through this
procedure again from the beginning.
OBH766B
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 com-
munication with the air conditioner is normal if the UNIT lamp 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 the NET lamp is not blinking, the Wi-Fi interface and the router
are not communicating properly. Move the router and check
No
whether the communication has been improved.
The following characters can not be used with SSID, so please
change if you are using. [ " , ' , < , > , & ]
Communication between the Wi-Fi interface and the router (or
MELCloud) has been failed.
The following characters can not be used with SSID, so please
No
change if you are using. [ " , ' , < , > , & ]
Refer to the SETUP MANUAL at the following URL.
http://www.melcloud.com/Support
27