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10-3. 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
The P.C. board has the print “J1” and “J2”. Jumper wires are mounted to each “J1” and “J2”.Cut “J1” and “J2” according to
the number of indoor unit as shown in Table 1.
After modification, push the RESET. button near the MIN-button on the remote controller.
Remove batteries before modification.
The board has a print as shown below;
NOTE : Fore re-modelling, take out the batteries at first.
After finish re-modelling, put back the batteries then push the RESET-button.
No.1 unit
No.2 unit
No.3 unit
No.4 unit
1 unit operation
No modification
2 unit operation
Same as at left
Cut J1
3 unit operation
Same as at left
Same as at left
Cut J2
4 unit operation
Same as at left
Same as at left
Same as at left
Cut both J1 and J2
Table1.
10
SERVICE FUNCTIONS
MSZ-A09RV -
MUZ-A09RV -
MSZ-A12RV -
MUZ-A12RV -
E1
E1
E1
E1
10-1. CHANGE IN DEFROST SETTING
<JP7> When the JP7 wire of the outdoor electronic control P.C. board is cut, the defrost temperature will be changed.
(Refer to page 55.)
Jumper wire
Change point
Deforst finish temperature changes from 13
:
to 15
:
.
JP7
10-2. 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 54.)
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.)
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.
OB230-2.qxp 02.5.28 7:37 PM Page 38
