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Service functions 8 – MITSUBISHI ELECTRIC Mitsubishi Split-Type User Manual

Page 9

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SERVICE FUNCTIONS

8

8-2. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATION

A maximum of 4 indoor units with wireless remote controllers can be used in a room.
In this case, to operate each indoor unit individually by each remote controller, P.C. boards of remote controller must be
modified according to the number of the indoor unit.

8-1. TIMER SHORT MODE

For service, set time can be shortened by short circuit of JPG and JPS the electronic control P.C. board.
The time will be shortened as follows. (Refer to 9-7.)
Set time : 1-minute

1-second

Set time : 3-minute

3-second (It takes 3 minutes for the compressor to start operation. However, the starting time is

shortened by short circuit of JPG and JPS.)

No. 1 unit

No. 2 unit

No. 3 unit

No. 4 unit

1 unit operation

No modification

2 units operation

Same as at left

Solder J1

3 units operation

Same as at left

Same as at left

Solder J2

4 units operation

Same as at left

Same as at left

Same as at left

Solder both J1 and J2

Table 1

How to set the remote controller exclusively for particular indoor unit.
After you turn the breaker ON, the first remote controller that sends the signal to the indoor unit will be regarded as the remote
controller for the indoor unit.
The indoor unit will only accept the signal from the remote controller that has been assigned to the indoor unit once they are
set.
The setting will be cancelled if the breaker has turned off, or the power supply has shut down.
Please conduct the above setting once again after the power has restored.

How to modify the remote controller P.C. board

Remove batteries before modification.
The board has a print as shown below :

The P.C. board has the print “J1” and “J2”. Solder “J1” and “J2” according to the number of indoor unit as shown in Table 1.
After modification, press the RESET button.

NOTE : For remodelling, take out

the batteries and press the
OPERATE/STOP(ON/OFF)
button twice or 3 times at
first.
After finish remodelling,
put back the batteries then
press the RESET button.

Remote controller model : KM05B

J2

J1

MSZ-GA22VA -
MSZ-GA25VA -
MSZ-GA35VA -

E1

E1

E1

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