Service Functions - Mitsubishi Electric MS-09SN-C1 Service Manual

9

SERVICE FUNCTIONS

MS-09SN - MS-12SN -
C1
MS-09SN - MS-12SN -
C2
MS-10SN - MS-15SN -
C1
MS-10SN - MS-15SN -
C2
9-1. 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 40 or 41.)
Set time : 1-minute
Set time : 3-minute
9-2. 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.
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, push 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.
MS-17SN -
C1
MS-18SN -
C2
MS-24SN -
C1
C2
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
No modification
–
–
–
C1
C1
C1
2 units operation
Same as at left
Solder J1
–
–
32
NOTE : For remodelling, take out the batter-
ies and push the
OPERATE/STOP(ON/OFF) button
twice or 3 times at first.
After finish remodelling, put back
the batteries then push the RESET
button.
3 units operation
Same as at left
Same as at left
Solder J2
Solder both J1 and J2
–
4 units operation
Same as at left
Same as at left
Same as at left