Service Functions - Mitsubishi Electric Mr. Slim MS09TW Service Manual

10

SERVICE FUNCTIONS

MS09TW MS12TN MS15TN MS17TN
10-1. 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 page 39 or 40.)
Set time : 1 minute
Set time : 3 minute
10-2. 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 indoor unit number.
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.
Table 1
No. 1 unit
No. 2 unit
No. 3 unit
No. 4 unit
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 accepts 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.
1-second
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.)
1 unit operation 2 units operation
No modification
–
–
–
3 units operation
Same as at left
Solder J1
–
–
OB274-31
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 but-
ton.
4 units operation
Same as at left
Same as at left
Solder J2
– Solder both J1 and J2
Same as at left
Same as at left
Same as at left