Service Functions - Mitsubishi Electric MCF-13NV-E3 Service Manual

10

SERVICE FUNCTIONS

MCF-13NV -
E3
10-1. TIMER SHORT MODE
For service, set time can be shortened by short circuit of JPG and JPS on the electronic control P.C. board.
The time will be shortened as follows.
3-minutes time delay : 3-minutes
AUTO START : 1 hour
AUTO STOP : 1 hour
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
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;
NOTE : Fore remodelling, take out the batteries at first.
After finish remodelling, put back the batteries then push the RESET button.
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.
Table1.
No.1 unit
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.
10-3. RELEASE OF AUTO RESTART FUNCTION
The jumper line is soldered with "JHA (refer to page 27)" on the indoor electronic control P.C. board.
Remove the auto restart P.C. board from "Connector CN104".
3-seconds.
1-minute
}
Short the connector during the timer mode.
1-minute
"J1" and "J2" Jumper wires
1 unit operation 2 units operation
No modification
3 units operation
Same as at left
Cut J1
21
4 units operation
Same as at left
Same as at left
Cut J2
Cut both J1 and J2
Same as at left
Same as at left
Same as at left