Service Functions - Mitsubishi Electric MS-18NV Service Manual

9

SERVICE FUNCTIONS

MS-18NV -
E4
9-1. TIMER SHORT MODE
For service, set time can be shortened by short circuit of JPG and JPS on the electronics control P.C. board.
The time will be shortened as follows.
3-minutes delay : 3-minutes
AUTO START : 1 hour
AUTO STOP : 1 hour
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". 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.
Table 1.
1 unit operation
No. 1 unit No modification
No. 2 unit
No. 3 unit
No. 4 unit
NOTE :
At power supply failure or installation, indoor unit deletes the memory about remote controller. When the power supply
is turned on and indoor unit receives the first signals from the remote controller, the remote controller number is
designated as the indoor unit number. Therefore at and after the second time indoor unit accepts the remote controller
of the initial setting number.
At setting-error, turn the power supply off to cancel the individual operation, and then turn the power supply on to
restart the setting.
3-seconds.
1-minute
}
Short the connector during the timer mode.
1-minute
2 units operation
Same as at left
–
–
–
3 units operation
Same as at left
Cut J1 Same as at left
–
–
16
NOTE : For remodelling, take out
the batteries at first.
After finish remodelling, put
back the batteries then
push the RESET button.
4 units operation
Same as at left
Same as at left
Cut J2 Same as at left
– Cut both J1 and J2