Service Functions - Mitsubishi Electric MSZ-D30NA Service Manual

7

SERVICE FUNCTIONS

MSZ-GE06NA MSZ-GE09NA MSZ-GE12NA MSZ-GE15NA MSZ-GE18NA MSZ-GE24NA
MSY-GE09NA MSY-GE12NA MSY-GE15NA MSY-GE18NA MSY-GE24NA
7-1. TIMER SHORT MODE
For service, the set time can be shortened by bridging of JPG and JPS the indoor electronic control P.C. board.
The time will be shortened as follows. (Refer to 9-7.)
• The set time for the ON/OFF timer can be reduced to 1 second for each minutes.
• After the breaker is turned on, the time for starting the compressor, which normally takes 3 minuets, can be reduced to
3 seconds. Restarting the compressor, which takes 3 minuets, cannot be reduced.
7-2. 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, 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 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 been restored.
OBH548D
J1
1 unit operation
No modifi cation
—
—
—
NOTE: For modification, take out the batteries and
J2
2 units operation
Same as at left
Solder J1
—
—
12
press the OPERATE/STOP (ON/OFF) button
twice or 3 times at first.
After finish modification, put back the batteries
then press 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