Mitsubishi Electric MAC-558IF-E, Installation Manual

10

4.  Connecting the Wi-Fi Adaptor

• Before dismantling the indoor unit turn off and verify the power has been disconnected to the complete 

air-conditioning system.

• Dismantle the indoor unit in accordance with the service manual and locate CN105 on the Main control PCB.
• The connecting cable (5-core) connected to a room air conditioner (CN105) should be mounted at the 

room air conditioner or its vicinity. 

• Cable length outside air conditioner: less than 50cm.

Mounting  

cord clamp   

Cable 

mount

Connecting  

cable (5-core)

Mounting  

cord clamp 

Screw   

Screw   

Taken out from 

the left side

Taken out from 

the right side

Screw 

Screw 

Establishing Wi-Fi connection

After connecting the Wi-Fi adaptor to the air conditioner and reassembling the system, the Wi-Fi adaptor 
must register with the access point or Wi-Fi router (to communicate with the server). For this Wi-Fi 
adaptor, the use of WPS-Push is recommended. (Refer to 8.)
1)  Hold down the WPS switch on the Wi-Fi adaptor for about 2 seconds to activate WPS-Push.  

When WPS-Push on the Wi-Fi adaptor is ready to communicate with the access point, LED 1 flashes  
at a 0.5-second interval.

2) Activate WPS-Push on the access point.
3)  When WPS-Push is successfully enabled, LED 1 lights up for 5 seconds. If it failed, LED 2 lights up for 

5 seconds, so try again from step 1.

Main causes that WPS failed are as follows: 

Communication distance (from the Wi-Fi adaptor to access point), access point settings (encryption, 

authentication, limit of connections, etc.) Refer to the instruction manual for more information.

     Do not install the Wi-Fi adaptor  

inside the indoor unit.

CASE1

CASE2

(For details on each system, see the relevant instruction manual.)

5. Specifications

Input Voltage 

DC12.7V (from indoor unit)

Power consumption 

MAX 2W

Size W×H×D (mm) 

88×49×18.5

Weight 

105g (including cable  )

RF channel

1ch ~ 13ch

Radio protocol

IEEE 802.11b/g/n (20)

Encryption

AES

Authentication

PSK

3. Parts

1

Adaptor unit  

[with connecting cable 

(5-core)]

1

4

Mounting cord  
clamp 

1

2

Screw for mounting  
3.5×16

1

5

Fastener  

(for bundling the 

wires)

1

3

Screw for mounting  
4×16

1