Mitsubishi Electric MSZ-LN25VGW Service Manual page 26

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.
OBH766
There is a problem in communication between the air conditioner
and the Wi-Fi interface. Check whether the air conditioner can be
No
operated with a remote controller.
If the air conditioner does not operate, refer to10-3.1. .
If the air conditioner operates, hold down the RESET switch of Wi-Fi
interface for 2 seconds. The communication with the air conditioner
is normal if the UNIT lamp starts blinking after about 30 seconds.
If the problem persists, check for the cable and the connector of Wi-
Fi interface. (If all else failed, replace the Wi-Fi interface.)
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
No
check whether the communication has been improved.
Communication between the Wi-Fi interface and the router (or
MELCloud) has been failed. Refer to the manual at the follow-
ing URL.
No
http://www.melcloud.com/Support
26