Mitsubishi Electric Mr.SLIM SEZ-M25DA Installation Manual page 16

8. Electrical work
Only the wiring from the signal receiving unit and between the remote controllers is
shown in [Fig. 8-4-1]. The wiring differs depending on the unit to be connected or
the system to be used.
For details on restrictions, refer to the installation manual or the service handbook
that came with the unit.
1. Connecting to Mr. SLIM air conditioner
(1) Standard 1:1
① Connecting the signal receiving unit
Connect the signal receiving unit to the CN90 (Connect to the wireless remote
controller board) on the indoor unit using the supplied remote controller wire.
Connect the signal receiving units to all the indoor units.
2) Installing procedures
Refer to the installation manual that comes with each remote controller for details.
8.4.3. Setting
1) Setting the pair number switch
[Fig. 8-4-2] (P.6)
<Indoor controller board>
1. Setting method
Assign the same pair number to the wireless remote controller as that of the
indoor unit. If not doing so, the remote controller cannot be operated. Refer to
the installation manual that came with the wireless remote controller for how to
set pair numbers of wireless remote controllers.
Position of daisy wire on the controller circuit board on the indoor unit.
Controller circuit board on the indoor unit (reference)
[Fig. 8-4-2] (P.6)
Ⓐ CN90: Connector for remote controller wire connection
For pair number settings, the following 4 patters (A-D) are available.
Pair number Pair number on
setting pattern remote controller side
A 0
B 1
C 2
D 3~9
2. Setting example
(1) To use the units in the same room
[Fig. 8-4-3] (P.6)
① Separate setting
Assign a different pair number to each indoor unit to operate each indoor unit
by its own wireless remote controller.
[Fig. 8-4-4] (P.6)
② Single setting
Assign the same pair number to all the indoor units to operate all the indoor
units by a single wireless remote controller.
[Fig. 8-4-5] (P.6)
(2) To use the units in different rooms
Assign the same pair number to the wireless remote controller as that of the
indoor unit. (Leave the setting as it is at purchase.)
2) Setting the Model No.
① Insert batteries.
② Press the SET button with something sharp at the end.
blinke and Model No. lighted.
MODEL SELECT
③ Press the temp button to set the Model No.
④ Press the SET button with something sharp at the end.
and Model No. are lighted for three seconds, then turned off.
MODEL SELECT
Indoor
heat pump models
SEZ
cooling only models
16
Indoor controller circuit board side Point
where the daisy wire is disconnected
Not disconnected
J41 disconnected
J42 disconnected
J41 and J42 disconnected
Outdoor Model No.
026
058
8.5. Function settings
8.5.1. For wired remote controller
① [Fig. 8-5-1] (P.7)
• Select "Service" from the Main menu, and press the [SELECT] button.
• Select "Function setting" with the [F1] or [F2] button, and press the [SELECT]
button.
② [Fig. 8-5-2] (P.7)
• Set the indoor unit refrigerant addresses and unit numbers with the [F1]
through [F4] buttons, and then press the [SELECT] button to confirm the
current setting.
<Checking the Indoor unit No.>
When the [SELECT] button is pressed, the target indoor unit will start fan
operation. If the unit is common or when running all units, all indoor units for the
selected refrigerant address will start fan operation.
③ [Fig. 8-5-3] (P.7)
• When data collection from the indoor units is completed, the current settings
appears highlighted. Non-highlighted items indicate that no function settings
are made. Screen appearance varies depending on the "Unit No." setting.
④ [Fig. 8-5-4] (P.7)
• Use the [F1] or [F2] button to move the cursor to select the mode number, and
change the setting number with the [F3] or [F4] button.
⑤ [Fig. 8-5-5] (P.7)
• When the settings are completed, press the [SELECT] button to send the
setting data from the remote controller to the indoor units.
• When the transmission is successfully completed, the screen will return to the
Function setting screen.
8.5.2. For wireless remote controller
[Fig. 8-5-6] (P.7)
Ⓐ Hour button
Ⓑ Minute button
Ⓒ TEMP button
Ⓓ TEMP button
Ⓔ ON/OFF button
Ⓕ CHECK button
1. Changing the external static pressure setting.
• Be sure to change the external static pressure setting depending on the duct
and the grill used.
① Go to the function select mode
Press the CHECK button Ⓕ twice continuously.
(Start this operation from the status of remote controller display turned off.)
is lighted and "00" blinks.
CHECK
Press the TEMP button Ⓒ once to set "50". Direct the wireless remote controller
toward the receiver of the indoor unit and press the Hour button Ⓐ .
② Setting the unit number
Press the TEMP button Ⓒ and Ⓓ to set the unit number to 01-04 or AL. Direct
the wireless remote controller toward the receiver of the indoor unit and press
the Minute button Ⓑ .
③ Selecting a mode
Enter 08 to change the external static pressure setting using the Ⓒ and Ⓓ
buttons.
Direct the wireless remote controller toward the receiver of the indoor unit and
press the Hour button Ⓐ .
Current setting number: 1 = 1 beep (one second)
2 = 2 beeps (one second each)
3 = 3 beeps (one second each)
④ Selecting the setting number
Use the Ⓒ and Ⓓ buttons to change the external static pressure setting to be
used.
Direct the wireless remote controller toward the sensor of the indoor unit and
press the Hour button Ⓐ .
⑤ To set the external static pressure
Repeat steps ③ and ④ to set the mode number to 10.
⑥ Complete function selection
Direct the wireless remote controller toward the sensor of the indoor unit and
press the ON/OFF button Ⓔ .
Note:
• Whenever changes are made to the function settings after installation or
maintenance, be sure to record the changes with a mark in the "Check"
column of the Function table.